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-rw-r--r--drivers/base/Makefile3
-rw-r--r--drivers/base/attribute_container.c9
-rw-r--r--drivers/base/base.h64
-rw-r--r--drivers/base/bus.c501
-rw-r--r--drivers/base/class.c319
-rw-r--r--drivers/base/core.c582
-rw-r--r--drivers/base/cpu.c2
-rw-r--r--drivers/base/dd.c164
-rw-r--r--drivers/base/driver.c216
-rw-r--r--drivers/base/firmware.c26
-rw-r--r--drivers/base/hypervisor.c12
-rw-r--r--drivers/base/init.c10
-rw-r--r--drivers/base/memory.c2
-rw-r--r--drivers/base/module.c94
-rw-r--r--drivers/base/node.c2
-rw-r--r--drivers/base/platform.c239
-rw-r--r--drivers/base/power/Makefile1
-rw-r--r--drivers/base/power/main.c502
-rw-r--r--drivers/base/power/power.h19
-rw-r--r--drivers/base/power/shutdown.c48
-rw-r--r--drivers/base/sys.c49
21 files changed, 1681 insertions, 1183 deletions
diff --git a/drivers/base/Makefile b/drivers/base/Makefile
index b39ea3f59c9b..63e09c015ca0 100644
--- a/drivers/base/Makefile
+++ b/drivers/base/Makefile
@@ -11,6 +11,9 @@ obj-$(CONFIG_FW_LOADER) += firmware_class.o
obj-$(CONFIG_NUMA) += node.o
obj-$(CONFIG_MEMORY_HOTPLUG_SPARSE) += memory.o
obj-$(CONFIG_SMP) += topology.o
+ifeq ($(CONFIG_SYSFS),y)
+obj-$(CONFIG_MODULES) += module.o
+endif
obj-$(CONFIG_SYS_HYPERVISOR) += hypervisor.o
ifeq ($(CONFIG_DEBUG_DRIVER),y)
diff --git a/drivers/base/attribute_container.c b/drivers/base/attribute_container.c
index 7370d7cf5988..d4dfb97de3b0 100644
--- a/drivers/base/attribute_container.c
+++ b/drivers/base/attribute_container.c
@@ -61,7 +61,7 @@ attribute_container_classdev_to_container(struct class_device *classdev)
}
EXPORT_SYMBOL_GPL(attribute_container_classdev_to_container);
-static struct list_head attribute_container_list;
+static LIST_HEAD(attribute_container_list);
static DEFINE_MUTEX(attribute_container_mutex);
@@ -429,10 +429,3 @@ attribute_container_find_class_device(struct attribute_container *cont,
return cdev;
}
EXPORT_SYMBOL_GPL(attribute_container_find_class_device);
-
-int __init
-attribute_container_init(void)
-{
- INIT_LIST_HEAD(&attribute_container_list);
- return 0;
-}
diff --git a/drivers/base/base.h b/drivers/base/base.h
index 10b2fb6c9ce6..c0444146c09a 100644
--- a/drivers/base/base.h
+++ b/drivers/base/base.h
@@ -1,6 +1,42 @@
-/* initialisation functions */
+/**
+ * struct bus_type_private - structure to hold the private to the driver core portions of the bus_type structure.
+ *
+ * @subsys - the struct kset that defines this bus. This is the main kobject
+ * @drivers_kset - the list of drivers associated with this bus
+ * @devices_kset - the list of devices associated with this bus
+ * @klist_devices - the klist to iterate over the @devices_kset
+ * @klist_drivers - the klist to iterate over the @drivers_kset
+ * @bus_notifier - the bus notifier list for anything that cares about things
+ * on this bus.
+ * @bus - pointer back to the struct bus_type that this structure is associated
+ * with.
+ *
+ * This structure is the one that is the actual kobject allowing struct
+ * bus_type to be statically allocated safely. Nothing outside of the driver
+ * core should ever touch these fields.
+ */
+struct bus_type_private {
+ struct kset subsys;
+ struct kset *drivers_kset;
+ struct kset *devices_kset;
+ struct klist klist_devices;
+ struct klist klist_drivers;
+ struct blocking_notifier_head bus_notifier;
+ unsigned int drivers_autoprobe:1;
+ struct bus_type *bus;
+};
+
+struct driver_private {
+ struct kobject kobj;
+ struct klist klist_devices;
+ struct klist_node knode_bus;
+ struct module_kobject *mkobj;
+ struct device_driver *driver;
+};
+#define to_driver(obj) container_of(obj, struct driver_private, kobj)
+/* initialisation functions */
extern int devices_init(void);
extern int buses_init(void);
extern int classes_init(void);
@@ -13,17 +49,16 @@ static inline int hypervisor_init(void) { return 0; }
extern int platform_bus_init(void);
extern int system_bus_init(void);
extern int cpu_dev_init(void);
-extern int attribute_container_init(void);
-extern int bus_add_device(struct device * dev);
-extern void bus_attach_device(struct device * dev);
-extern void bus_remove_device(struct device * dev);
+extern int bus_add_device(struct device *dev);
+extern void bus_attach_device(struct device *dev);
+extern void bus_remove_device(struct device *dev);
-extern int bus_add_driver(struct device_driver *);
-extern void bus_remove_driver(struct device_driver *);
+extern int bus_add_driver(struct device_driver *drv);
+extern void bus_remove_driver(struct device_driver *drv);
-extern void driver_detach(struct device_driver * drv);
-extern int driver_probe_device(struct device_driver *, struct device *);
+extern void driver_detach(struct device_driver *drv);
+extern int driver_probe_device(struct device_driver *drv, struct device *dev);
extern void sysdev_shutdown(void);
extern int sysdev_suspend(pm_message_t state);
@@ -44,4 +79,13 @@ extern char *make_class_name(const char *name, struct kobject *kobj);
extern int devres_release_all(struct device *dev);
-extern struct kset devices_subsys;
+extern struct kset *devices_kset;
+
+#if defined(CONFIG_MODULES) && defined(CONFIG_SYSFS)
+extern void module_add_driver(struct module *mod, struct device_driver *drv);
+extern void module_remove_driver(struct device_driver *drv);
+#else
+static inline void module_add_driver(struct module *mod,
+ struct device_driver *drv) { }
+static inline void module_remove_driver(struct device_driver *drv) { }
+#endif
diff --git a/drivers/base/bus.c b/drivers/base/bus.c
index 9a19b071c573..f484495b2ad1 100644
--- a/drivers/base/bus.c
+++ b/drivers/base/bus.c
@@ -3,6 +3,8 @@
*
* Copyright (c) 2002-3 Patrick Mochel
* Copyright (c) 2002-3 Open Source Development Labs
+ * Copyright (c) 2007 Greg Kroah-Hartman <gregkh@suse.de>
+ * Copyright (c) 2007 Novell Inc.
*
* This file is released under the GPLv2
*
@@ -17,14 +19,13 @@
#include "power/power.h"
#define to_bus_attr(_attr) container_of(_attr, struct bus_attribute, attr)
-#define to_bus(obj) container_of(obj, struct bus_type, subsys.kobj)
+#define to_bus(obj) container_of(obj, struct bus_type_private, subsys.kobj)
/*
* sysfs bindings for drivers
*/
#define to_drv_attr(_attr) container_of(_attr, struct driver_attribute, attr)
-#define to_driver(obj) container_of(obj, struct device_driver, kobj)
static int __must_check bus_rescan_devices_helper(struct device *dev,
@@ -32,37 +33,40 @@ static int __must_check bus_rescan_devices_helper(struct device *dev,
static struct bus_type *bus_get(struct bus_type *bus)
{
- return bus ? container_of(kset_get(&bus->subsys),
- struct bus_type, subsys) : NULL;
+ if (bus) {
+ kset_get(&bus->p->subsys);
+ return bus;
+ }
+ return NULL;
}
static void bus_put(struct bus_type *bus)
{
- kset_put(&bus->subsys);
+ if (bus)
+ kset_put(&bus->p->subsys);
}
-static ssize_t
-drv_attr_show(struct kobject * kobj, struct attribute * attr, char * buf)
+static ssize_t drv_attr_show(struct kobject *kobj, struct attribute *attr,
+ char *buf)
{
- struct driver_attribute * drv_attr = to_drv_attr(attr);
- struct device_driver * drv = to_driver(kobj);
+ struct driver_attribute *drv_attr = to_drv_attr(attr);
+ struct driver_private *drv_priv = to_driver(kobj);
ssize_t ret = -EIO;
if (drv_attr->show)
- ret = drv_attr->show(drv, buf);
+ ret = drv_attr->show(drv_priv->driver, buf);
return ret;
}
-static ssize_t
-drv_attr_store(struct kobject * kobj, struct attribute * attr,
- const char * buf, size_t count)
+static ssize_t drv_attr_store(struct kobject *kobj, struct attribute *attr,
+ const char *buf, size_t count)
{
- struct driver_attribute * drv_attr = to_drv_attr(attr);
- struct device_driver * drv = to_driver(kobj);
+ struct driver_attribute *drv_attr = to_drv_attr(attr);
+ struct driver_private *drv_priv = to_driver(kobj);
ssize_t ret = -EIO;
if (drv_attr->store)
- ret = drv_attr->store(drv, buf, count);
+ ret = drv_attr->store(drv_priv->driver, buf, count);
return ret;
}
@@ -71,22 +75,12 @@ static struct sysfs_ops driver_sysfs_ops = {
.store = drv_attr_store,
};
-
-static void driver_release(struct kobject * kobj)
+static void driver_release(struct kobject *kobj)
{
- /*
- * Yes this is an empty release function, it is this way because struct
- * device is always a static object, not a dynamic one. Yes, this is
- * not nice and bad, but remember, drivers are code, reference counted
- * by the module count, not a device, which is really data. And yes,
- * in the future I do want to have all drivers be created dynamically,
- * and am working toward that goal, but it will take a bit longer...
- *
- * But do not let this example give _anyone_ the idea that they can
- * create a release function without any code in it at all, to do that
- * is almost always wrong. If you have any questions about this,
- * please send an email to <greg@kroah.com>
- */
+ struct driver_private *drv_priv = to_driver(kobj);
+
+ pr_debug("driver: '%s': %s\n", kobject_name(kobj), __FUNCTION__);
+ kfree(drv_priv);
}
static struct kobj_type driver_ktype = {
@@ -94,34 +88,30 @@ static struct kobj_type driver_ktype = {
.release = driver_release,
};
-
/*
* sysfs bindings for buses
*/
-
-
-static ssize_t
-bus_attr_show(struct kobject * kobj, struct attribute * attr, char * buf)
+static ssize_t bus_attr_show(struct kobject *kobj, struct attribute *attr,
+ char *buf)
{
- struct bus_attribute * bus_attr = to_bus_attr(attr);
- struct bus_type * bus = to_bus(kobj);
+ struct bus_attribute *bus_attr = to_bus_attr(attr);
+ struct bus_type_private *bus_priv = to_bus(kobj);
ssize_t ret = 0;
if (bus_attr->show)
- ret = bus_attr->show(bus, buf);
+ ret = bus_attr->show(bus_priv->bus, buf);
return ret;
}
-static ssize_t
-bus_attr_store(struct kobject * kobj, struct attribute * attr,
- const char * buf, size_t count)
+static ssize_t bus_attr_store(struct kobject *kobj, struct attribute *attr,
+ const char *buf, size_t count)
{
- struct bus_attribute * bus_attr = to_bus_attr(attr);
- struct bus_type * bus = to_bus(kobj);
+ struct bus_attribute *bus_attr = to_bus_attr(attr);
+ struct bus_type_private *bus_priv = to_bus(kobj);
ssize_t ret = 0;
if (bus_attr->store)
- ret = bus_attr->store(bus, buf, count);
+ ret = bus_attr->store(bus_priv->bus, buf, count);
return ret;
}
@@ -130,24 +120,26 @@ static struct sysfs_ops bus_sysfs_ops = {
.store = bus_attr_store,
};
-int bus_create_file(struct bus_type * bus, struct bus_attribute * attr)
+int bus_create_file(struct bus_type *bus, struct bus_attribute *attr)
{
int error;
if (bus_get(bus)) {
- error = sysfs_create_file(&bus->subsys.kobj, &attr->attr);
+ error = sysfs_create_file(&bus->p->subsys.kobj, &attr->attr);
bus_put(bus);
} else
error = -EINVAL;
return error;
}
+EXPORT_SYMBOL_GPL(bus_create_file);
-void bus_remove_file(struct bus_type * bus, struct bus_attribute * attr)
+void bus_remove_file(struct bus_type *bus, struct bus_attribute *attr)
{
if (bus_get(bus)) {
- sysfs_remove_file(&bus->subsys.kobj, &attr->attr);
+ sysfs_remove_file(&bus->p->subsys.kobj, &attr->attr);
bus_put(bus);
}
}
+EXPORT_SYMBOL_GPL(bus_remove_file);
static struct kobj_type bus_ktype = {
.sysfs_ops = &bus_sysfs_ops,
@@ -166,7 +158,7 @@ static struct kset_uevent_ops bus_uevent_ops = {
.filter = bus_uevent_filter,
};
-static decl_subsys(bus, &bus_ktype, &bus_uevent_ops);
+static struct kset *bus_kset;
#ifdef CONFIG_HOTPLUG
@@ -224,10 +216,13 @@ static ssize_t driver_bind(struct device_driver *drv,
if (dev->parent)
up(&dev->parent->sem);
- if (err > 0) /* success */
+ if (err > 0) {
+ /* success */
err = count;
- else if (err == 0) /* driver didn't accept device */
+ } else if (err == 0) {
+ /* driver didn't accept device */
err = -ENODEV;
+ }
}
put_device(dev);
bus_put(bus);
@@ -237,16 +232,16 @@ static DRIVER_ATTR(bind, S_IWUSR, NULL, driver_bind);
static ssize_t show_drivers_autoprobe(struct bus_type *bus, char *buf)
{
- return sprintf(buf, "%d\n", bus->drivers_autoprobe);
+ return sprintf(buf, "%d\n", bus->p->drivers_autoprobe);
}
static ssize_t store_drivers_autoprobe(struct bus_type *bus,
const char *buf, size_t count)
{
if (buf[0] == '0')
- bus->drivers_autoprobe = 0;
+ bus->p->drivers_autoprobe = 0;
else
- bus->drivers_autoprobe = 1;
+ bus->p->drivers_autoprobe = 1;
return count;
}
@@ -264,49 +259,49 @@ static ssize_t store_drivers_probe(struct bus_type *bus,
}
#endif
-static struct device * next_device(struct klist_iter * i)
+static struct device *next_device(struct klist_iter *i)
{
- struct klist_node * n = klist_next(i);
+ struct klist_node *n = klist_next(i);
return n ? container_of(n, struct device, knode_bus) : NULL;
}
/**
- * bus_for_each_dev - device iterator.
- * @bus: bus type.
- * @start: device to start iterating from.
- * @data: data for the callback.
- * @fn: function to be called for each device.
+ * bus_for_each_dev - device iterator.
+ * @bus: bus type.
+ * @start: device to start iterating from.
+ * @data: data for the callback.
+ * @fn: function to be called for each device.
*
- * Iterate over @bus's list of devices, and call @fn for each,
- * passing it @data. If @start is not NULL, we use that device to
- * begin iterating from.
+ * Iterate over @bus's list of devices, and call @fn for each,
+ * passing it @data. If @start is not NULL, we use that device to
+ * begin iterating from.
*
- * We check the return of @fn each time. If it returns anything
- * other than 0, we break out and return that value.
+ * We check the return of @fn each time. If it returns anything
+ * other than 0, we break out and return that value.
*
- * NOTE: The device that returns a non-zero value is not retained
- * in any way, nor is its refcount incremented. If the caller needs
- * to retain this data, it should do, and increment the reference
- * count in the supplied callback.
+ * NOTE: The device that returns a non-zero value is not retained
+ * in any way, nor is its refcount incremented. If the caller needs
+ * to retain this data, it should do, and increment the reference
+ * count in the supplied callback.
*/
-
-int bus_for_each_dev(struct bus_type * bus, struct device * start,
- void * data, int (*fn)(struct device *, void *))
+int bus_for_each_dev(struct bus_type *bus, struct device *start,
+ void *data, int (*fn)(struct device *, void *))
{
struct klist_iter i;
- struct device * dev;
+ struct device *dev;
int error = 0;
if (!bus)
return -EINVAL;
- klist_iter_init_node(&bus->klist_devices, &i,
+ klist_iter_init_node(&bus->p->klist_devices, &i,
(start ? &start->knode_bus : NULL));
while ((dev = next_device(&i)) && !error)
error = fn(dev, data);
klist_iter_exit(&i);
return error;
}
+EXPORT_SYMBOL_GPL(bus_for_each_dev);
/**
* bus_find_device - device iterator for locating a particular device.
@@ -323,9 +318,9 @@ int bus_for_each_dev(struct bus_type * bus, struct device * start,
* if it does. If the callback returns non-zero, this function will
* return to the caller and not iterate over any more devices.
*/
-struct device * bus_find_device(struct bus_type *bus,
- struct device *start, void *data,
- int (*match)(struct device *, void *))
+struct device *bus_find_device(struct bus_type *bus,
+ struct device *start, void *data,
+ int (*match)(struct device *dev, void *data))
{
struct klist_iter i;
struct device *dev;
@@ -333,7 +328,7 @@ struct device * bus_find_device(struct bus_type *bus,
if (!bus)
return NULL;
- klist_iter_init_node(&bus->klist_devices, &i,
+ klist_iter_init_node(&bus->p->klist_devices, &i,
(start ? &start->knode_bus : NULL));
while ((dev = next_device(&i)))
if (match(dev, data) && get_device(dev))
@@ -341,51 +336,57 @@ struct device * bus_find_device(struct bus_type *bus,
klist_iter_exit(&i);
return dev;
}
+EXPORT_SYMBOL_GPL(bus_find_device);
-
-static struct device_driver * next_driver(struct klist_iter * i)
+static struct device_driver *next_driver(struct klist_iter *i)
{
- struct klist_node * n = klist_next(i);
- return n ? container_of(n, struct device_driver, knode_bus) : NULL;
+ struct klist_node *n = klist_next(i);
+ struct driver_private *drv_priv;
+
+ if (n) {
+ drv_priv = container_of(n, struct driver_private, knode_bus);
+ return drv_priv->driver;
+ }
+ return NULL;
}
/**
- * bus_for_each_drv - driver iterator
- * @bus: bus we're dealing with.
- * @start: driver to start iterating on.
- * @data: data to pass to the callback.
- * @fn: function to call for each driver.
+ * bus_for_each_drv - driver iterator
+ * @bus: bus we're dealing with.
+ * @start: driver to start iterating on.
+ * @data: data to pass to the callback.
+ * @fn: function to call for each driver.
*
- * This is nearly identical to the device iterator above.
- * We iterate over each driver that belongs to @bus, and call
- * @fn for each. If @fn returns anything but 0, we break out
- * and return it. If @start is not NULL, we use it as the head
- * of the list.
+ * This is nearly identical to the device iterator above.
+ * We iterate over each driver that belongs to @bus, and call
+ * @fn for each. If @fn returns anything but 0, we break out
+ * and return it. If @start is not NULL, we use it as the head
+ * of the list.
*
- * NOTE: we don't return the driver that returns a non-zero
- * value, nor do we leave the reference count incremented for that
- * driver. If the caller needs to know that info, it must set it
- * in the callback. It must also be sure to increment the refcount
- * so it doesn't disappear before returning to the caller.
+ * NOTE: we don't return the driver that returns a non-zero
+ * value, nor do we leave the reference count incremented for that
+ * driver. If the caller needs to know that info, it must set it
+ * in the callback. It must also be sure to increment the refcount
+ * so it doesn't disappear before returning to the caller.
*/
-
-int bus_for_each_drv(struct bus_type * bus, struct device_driver * start,
- void * data, int (*fn)(struct device_driver *, void *))
+int bus_for_each_drv(struct bus_type *bus, struct device_driver *start,
+ void *data, int (*fn)(struct device_driver *, void *))
{
struct klist_iter i;
- struct device_driver * drv;
+ struct device_driver *drv;
int error = 0;
if (!bus)
return -EINVAL;
- klist_iter_init_node(&bus->klist_drivers, &i,
- start ? &start->knode_bus : NULL);
+ klist_iter_init_node(&bus->p->klist_drivers, &i,
+ start ? &start->p->knode_bus : NULL);
while ((drv = next_driver(&i)) && !error)
error = fn(drv, data);
klist_iter_exit(&i);
return error;
}
+EXPORT_SYMBOL_GPL(bus_for_each_drv);
static int device_add_attrs(struct bus_type *bus, struct device *dev)
{
@@ -396,7 +397,7 @@ static int device_add_attrs(struct bus_type *bus, struct device *dev)
return 0;
for (i = 0; attr_name(bus->dev_attrs[i]); i++) {
- error = device_create_file(dev,&bus->dev_attrs[i]);
+ error = device_create_file(dev, &bus->dev_attrs[i]);
if (error) {
while (--i >= 0)
device_remove_file(dev, &bus->dev_attrs[i]);
@@ -406,13 +407,13 @@ static int device_add_attrs(struct bus_type *bus, struct device *dev)
return error;
}
-static void device_remove_attrs(struct bus_type * bus, struct device * dev)
+static void device_remove_attrs(struct bus_type *bus, struct device *dev)
{
int i;
if (bus->dev_attrs) {
for (i = 0; attr_name(bus->dev_attrs[i]); i++)
- device_remove_file(dev,&bus->dev_attrs[i]);
+ device_remove_file(dev, &bus->dev_attrs[i]);
}
}
@@ -420,7 +421,7 @@ static void device_remove_attrs(struct bus_type * bus, struct device * dev)
static int make_deprecated_bus_links(struct device *dev)
{
return sysfs_create_link(&dev->kobj,
- &dev->bus->subsys.kobj, "bus");
+ &dev->bus->p->subsys.kobj, "bus");
}
static void remove_deprecated_bus_links(struct device *dev)
@@ -433,28 +434,28 @@ static inline void remove_deprecated_bus_links(struct device *dev) { }
#endif
/**
- * bus_add_device - add device to bus
- * @dev: device being added
+ * bus_add_device - add device to bus
+ * @dev: device being added
*
- * - Add the device to its bus's list of devices.
- * - Create link to device's bus.
+ * - Add the device to its bus's list of devices.
+ * - Create link to device's bus.
*/
-int bus_add_device(struct device * dev)
+int bus_add_device(struct device *dev)
{
- struct bus_type * bus = bus_get(dev->bus);
+ struct bus_type *bus = bus_get(dev->bus);
int error = 0;
if (bus) {
- pr_debug("bus %s: add device %s\n", bus->name, dev->bus_id);
+ pr_debug("bus: '%s': add device %s\n", bus->name, dev->bus_id);
error = device_add_attrs(bus, dev);
if (error)
goto out_put;
- error = sysfs_create_link(&bus->devices.kobj,
+ error = sysfs_create_link(&bus->p->devices_kset->kobj,
&dev->kobj, dev->bus_id);
if (error)
goto out_id;
error = sysfs_create_link(&dev->kobj,
- &dev->bus->subsys.kobj, "subsystem");
+ &dev->bus->p->subsys.kobj, "subsystem");
if (error)
goto out_subsys;
error = make_deprecated_bus_links(dev);
@@ -466,7 +467,7 @@ int bus_add_device(struct device * dev)
out_deprecated:
sysfs_remove_link(&dev->kobj, "subsystem");
out_subsys:
- sysfs_remove_link(&bus->devices.kobj, dev->bus_id);
+ sysfs_remove_link(&bus->p->devices_kset->kobj, dev->bus_id);
out_id:
device_remove_attrs(bus, dev);
out_put:
@@ -475,56 +476,58 @@ out_put:
}
/**
- * bus_attach_device - add device to bus
- * @dev: device tried to attach to a driver
+ * bus_attach_device - add device to bus
+ * @dev: device tried to attach to a driver
*
- * - Add device to bus's list of devices.
- * - Try to attach to driver.
+ * - Add device to bus's list of devices.
+ * - Try to attach to driver.
*/
-void bus_attach_device(struct device * dev)
+void bus_attach_device(struct device *dev)
{
struct bus_type *bus = dev->bus;
int ret = 0;
if (bus) {
dev->is_registered = 1;
- if (bus->drivers_autoprobe)
+ if (bus->p->drivers_autoprobe)
ret = device_attach(dev);
WARN_ON(ret < 0);
if (ret >= 0)
- klist_add_tail(&dev->knode_bus, &bus->klist_devices);
+ klist_add_tail(&dev->knode_bus, &bus->p->klist_devices);
else
dev->is_registered = 0;
}
}
/**
- * bus_remove_device - remove device from bus
- * @dev: device to be removed
+ * bus_remove_device - remove device from bus
+ * @dev: device to be removed
*
- * - Remove symlink from bus's directory.
- * - Delete device from bus's list.
- * - Detach from its driver.
- * - Drop reference taken in bus_add_device().
+ * - Remove symlink from bus's directory.
+ * - Delete device from bus's list.
+ * - Detach from its driver.
+ * - Drop reference taken in bus_add_device().
*/
-void bus_remove_device(struct device * dev)
+void bus_remove_device(struct device *dev)
{
if (dev->bus) {
sysfs_remove_link(&dev->kobj, "subsystem");
remove_deprecated_bus_links(dev);
- sysfs_remove_link(&dev->bus->devices.kobj, dev->bus_id);
+ sysfs_remove_link(&dev->bus->p->devices_kset->kobj,
+ dev->bus_id);
device_remove_attrs(dev->bus, dev);
if (dev->is_registered) {
dev->is_registered = 0;
klist_del(&dev->knode_bus);
}
- pr_debug("bus %s: remove device %s\n", dev->bus->name, dev->bus_id);
+ pr_debug("bus: '%s': remove device %s\n",
+ dev->bus->name, dev->bus_id);
device_release_driver(dev);
bus_put(dev->bus);
}
}
-static int driver_add_attrs(struct bus_type * bus, struct device_driver * drv)
+static int driver_add_attrs(struct bus_type *bus, struct device_driver *drv)
{
int error = 0;
int i;
@@ -533,19 +536,19 @@ static int driver_add_attrs(struct bus_type * bus, struct device_driver * drv)
for (i = 0; attr_name(bus->drv_attrs[i]); i++) {
error = driver_create_file(drv, &bus->drv_attrs[i]);
if (error)
- goto Err;
+ goto err;
}
}
- Done:
+done:
return error;
- Err:
+err:
while (--i >= 0)
driver_remove_file(drv, &bus->drv_attrs[i]);
- goto Done;
+ goto done;
}
-
-static void driver_remove_attrs(struct bus_type * bus, struct device_driver * drv)
+static void driver_remove_attrs(struct bus_type *bus,
+ struct device_driver *drv)
{
int i;
@@ -616,39 +619,46 @@ static ssize_t driver_uevent_store(struct device_driver *drv,
enum kobject_action action;
if (kobject_action_type(buf, count, &action) == 0)
- kobject_uevent(&drv->kobj, action);
+ kobject_uevent(&drv->p->kobj, action);
return count;
}
static DRIVER_ATTR(uevent, S_IWUSR, NULL, driver_uevent_store);
/**
- * bus_add_driver - Add a driver to the bus.
- * @drv: driver.
- *
+ * bus_add_driver - Add a driver to the bus.
+ * @drv: driver.
*/
int bus_add_driver(struct device_driver *drv)
{
- struct bus_type * bus = bus_get(drv->bus);
+ struct bus_type *bus;
+ struct driver_private *priv;
int error = 0;
+ bus = bus_get(drv->bus);
if (!bus)
return -EINVAL;
- pr_debug("bus %s: add driver %s\n", bus->name, drv->name);
- error = kobject_set_name(&drv->kobj, "%s", drv->name);
- if (error)
- goto out_put_bus;
- drv->kobj.kset = &bus->drivers;
- error = kobject_register(&drv->kobj);
+ pr_debug("bus: '%s': add driver %s\n", bus->name, drv->name);
+
+ priv = kzalloc(sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ klist_init(&priv->klist_devices, NULL, NULL);
+ priv->driver = drv;
+ drv->p = priv;
+ priv->kobj.kset = bus->p->drivers_kset;
+ error = kobject_init_and_add(&priv->kobj, &driver_ktype, NULL,
+ "%s", drv->name);
if (error)
goto out_put_bus;
- if (drv->bus->drivers_autoprobe) {
+ if (drv->bus->p->drivers_autoprobe) {
error = driver_attach(drv);
if (error)
goto out_unregister;
}
- klist_add_tail(&drv->knode_bus, &bus->klist_drivers);
+ klist_add_tail(&priv->knode_bus, &bus->p->klist_drivers);
module_add_driver(drv->owner, drv);
error = driver_create_file(drv, &driver_attr_uevent);
@@ -669,24 +679,24 @@ int bus_add_driver(struct device_driver *drv)
__FUNCTION__, drv->name);
}
+ kobject_uevent(&priv->kobj, KOBJ_ADD);
return error;
out_unregister:
- kobject_unregister(&drv->kobj);
+ kobject_put(&priv->kobj);
out_put_bus:
bus_put(bus);
return error;
}
/**
- * bus_remove_driver - delete driver from bus's knowledge.
- * @drv: driver.
+ * bus_remove_driver - delete driver from bus's knowledge.
+ * @drv: driver.
*
- * Detach the driver from the devices it controls, and remove
- * it from its bus's list of drivers. Finally, we drop the reference
- * to the bus we took in bus_add_driver().
+ * Detach the driver from the devices it controls, and remove
+ * it from its bus's list of drivers. Finally, we drop the reference
+ * to the bus we took in bus_add_driver().
*/
-
-void bus_remove_driver(struct device_driver * drv)
+void bus_remove_driver(struct device_driver *drv)
{
if (!drv->bus)
return;
@@ -694,18 +704,17 @@ void bus_remove_driver(struct device_driver * drv)
remove_bind_files(drv);
driver_remove_attrs(drv->bus, drv);
driver_remove_file(drv, &driver_attr_uevent);
- klist_remove(&drv->knode_bus);
- pr_debug("bus %s: remove driver %s\n", drv->bus->name, drv->name);
+ klist_remove(&drv->p->knode_bus);
+ pr_debug("bus: '%s': remove driver %s\n", drv->bus->name, drv->name);
driver_detach(drv);
module_remove_driver(drv);
- kobject_unregister(&drv->kobj);
+ kobject_put(&drv->p->kobj);
bus_put(drv->bus);
}
-
/* Helper for bus_rescan_devices's iter */
static int __must_check bus_rescan_devices_helper(struct device *dev,
- void *data)
+ void *data)
{
int ret = 0;
@@ -727,10 +736,11 @@ static int __must_check bus_rescan_devices_helper(struct device *dev,
* attached and rescan it against existing drivers to see if it matches
* any by calling device_attach() for the unbound devices.
*/
-int bus_rescan_devices(struct bus_type * bus)
+int bus_rescan_devices(struct bus_type *bus)
{
return bus_for_each_dev(bus, NULL, NULL, bus_rescan_devices_helper);
}
+EXPORT_SYMBOL_GPL(bus_rescan_devices);
/**
* device_reprobe - remove driver for a device and probe for a new driver
@@ -755,55 +765,55 @@ int device_reprobe(struct device *dev)
EXPORT_SYMBOL_GPL(device_reprobe);
/**
- * find_bus - locate bus by name.
- * @name: name of bus.
+ * find_bus - locate bus by name.
+ * @name: name of bus.
*
- * Call kset_find_obj() to iterate over list of buses to
- * find a bus by name. Return bus if found.
+ * Call kset_find_obj() to iterate over list of buses to
+ * find a bus by name. Return bus if found.
*
- * Note that kset_find_obj increments bus' reference count.
+ * Note that kset_find_obj increments bus' reference count.
*/
#if 0
-struct bus_type * find_bus(char * name)
+struct bus_type *find_bus(char *name)
{
- struct kobject * k = kset_find_obj(&bus_subsys.kset, name);
+ struct kobject *k = kset_find_obj(bus_kset, name);
return k ? to_bus(k) : NULL;
}
#endif /* 0 */
/**
- * bus_add_attrs - Add default attributes for this bus.
- * @bus: Bus that has just been registered.
+ * bus_add_attrs - Add default attributes for this bus.
+ * @bus: Bus that has just been registered.
*/
-static int bus_add_attrs(struct bus_type * bus)
+static int bus_add_attrs(struct bus_type *bus)
{
int error = 0;
int i;
if (bus->bus_attrs) {
for (i = 0; attr_name(bus->bus_attrs[i]); i++) {
- error = bus_create_file(bus,&bus->bus_attrs[i]);
+ error = bus_create_file(bus, &bus->bus_attrs[i]);
if (error)
- goto Err;
+ goto err;
}
}
- Done:
+done:
return error;
- Err:
+err:
while (--i >= 0)
- bus_remove_file(bus,&bus->bus_attrs[i]);
- goto Done;
+ bus_remove_file(bus, &bus->bus_attrs[i]);
+ goto done;
}
-static void bus_remove_attrs(struct bus_type * bus)
+static void bus_remove_attrs(struct bus_type *bus)
{
int i;
if (bus->bus_attrs) {
for (i = 0; attr_name(bus->bus_attrs[i]); i++)
- bus_remove_file(bus,&bus->bus_attrs[i]);
+ bus_remove_file(bus, &bus->bus_attrs[i]);
}
}
@@ -827,32 +837,42 @@ static ssize_t bus_uevent_store(struct bus_type *bus,
enum kobject_action action;
if (kobject_action_type(buf, count, &action) == 0)
- kobject_uevent(&bus->subsys.kobj, action);
+ kobject_uevent(&bus->p->subsys.kobj, action);
return count;
}
static BUS_ATTR(uevent, S_IWUSR, NULL, bus_uevent_store);
/**
- * bus_register - register a bus with the system.
- * @bus: bus.
+ * bus_register - register a bus with the system.
+ * @bus: bus.
*
- * Once we have that, we registered the bus with the kobject
- * infrastructure, then register the children subsystems it has:
- * the devices and drivers that belong to the bus.
+ * Once we have that, we registered the bus with the kobject
+ * infrastructure, then register the children subsystems it has:
+ * the devices and drivers that belong to the bus.
*/
-int bus_register(struct bus_type * bus)
+int bus_register(struct bus_type *bus)
{
int retval;
+ struct bus_type_private *priv;
+
+ priv = kzalloc(sizeof(struct bus_type_private), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
- BLOCKING_INIT_NOTIFIER_HEAD(&bus->bus_notifier);
+ priv->bus = bus;
+ bus->p = priv;
- retval = kobject_set_name(&bus->subsys.kobj, "%s", bus->name);
+ BLOCKING_INIT_NOTIFIER_HEAD(&priv->bus_notifier);
+
+ retval = kobject_set_name(&priv->subsys.kobj, "%s", bus->name);
if (retval)
goto out;
- bus->subsys.kobj.kset = &bus_subsys;
+ priv->subsys.kobj.kset = bus_kset;
+ priv->subsys.kobj.ktype = &bus_ktype;
+ priv->drivers_autoprobe = 1;
- retval = subsystem_register(&bus->subsys);
+ retval = kset_register(&priv->subsys);
if (retval)
goto out;
@@ -860,23 +880,23 @@ int bus_register(struct bus_type * bus)
if (retval)
goto bus_uevent_fail;
- kobject_set_name(&bus->devices.kobj, "devices");
- bus->devices.kobj.parent = &bus->subsys.kobj;
- retval = kset_register(&bus->devices);
- if (retval)
+ priv->devices_kset = kset_create_and_add("devices", NULL,
+ &priv->subsys.kobj);
+ if (!priv->devices_kset) {
+ retval = -ENOMEM;
goto bus_devices_fail;
+ }
- kobject_set_name(&bus->drivers.kobj, "drivers");
- bus->drivers.kobj.parent = &bus->subsys.kobj;
- bus->drivers.ktype = &driver_ktype;
- retval = kset_register(&bus->drivers);
- if (retval)
+ priv->drivers_kset = kset_create_and_add("drivers", NULL,
+ &priv->subsys.kobj);
+ if (!priv->drivers_kset) {
+ retval = -ENOMEM;
goto bus_drivers_fail;
+ }
- klist_init(&bus->klist_devices, klist_devices_get, klist_devices_put);
- klist_init(&bus->klist_drivers, NULL, NULL);
+ klist_init(&priv->klist_devices, klist_devices_get, klist_devices_put);
+ klist_init(&priv->klist_drivers, NULL, NULL);
- bus->drivers_autoprobe = 1;
retval = add_probe_files(bus);
if (retval)
goto bus_probe_files_fail;
@@ -885,66 +905,73 @@ int bus_register(struct bus_type * bus)
if (retval)
goto bus_attrs_fail;
- pr_debug("bus type '%s' registered\n", bus->name);
+ pr_debug("bus: '%s': registered\n", bus->name);
return 0;
bus_attrs_fail:
remove_probe_files(bus);
bus_probe_files_fail:
- kset_unregister(&bus->drivers);
+ kset_unregister(bus->p->drivers_kset);
bus_drivers_fail:
- kset_unregister(&bus->devices);
+ kset_unregister(bus->p->devices_kset);
bus_devices_fail:
bus_remove_file(bus, &bus_attr_uevent);
bus_uevent_fail:
- subsystem_unregister(&bus->subsys);
+ kset_unregister(&bus->p->subsys);
+ kfree(bus->p);
out:
return retval;
}
+EXPORT_SYMBOL_GPL(bus_register);
/**
- * bus_unregister - remove a bus from the system
- * @bus: bus.
+ * bus_unregister - remove a bus from the system
+ * @bus: bus.
*
- * Unregister the child subsystems and the bus itself.
- * Finally, we call bus_put() to release the refcount
+ * Unregister the child subsystems and the bus itself.
+ * Finally, we call bus_put() to release the refcount
*/
-void bus_unregister(struct bus_type * bus)
+void bus_unregister(struct bus_type *bus)
{
- pr_debug("bus %s: unregistering\n", bus->name);
+ pr_debug("bus: '%s': unregistering\n", bus->name);
bus_remove_attrs(bus);
remove_probe_files(bus);
- kset_unregister(&bus->drivers);
- kset_unregister(&bus->devices);
+ kset_unregister(bus->p->drivers_kset);
+ kset_unregister(bus->p->devices_kset);
bus_remove_file(bus, &bus_attr_uevent);
- subsystem_unregister(&bus->subsys);
+ kset_unregister(&bus->p->subsys);
+ kfree(bus->p);
}
+EXPORT_SYMBOL_GPL(bus_unregister);
int bus_register_notifier(struct bus_type *bus, struct notifier_block *nb)
{
- return blocking_notifier_chain_register(&bus->bus_notifier, nb);
+ return blocking_notifier_chain_register(&bus->p->bus_notifier, nb);
}
EXPORT_SYMBOL_GPL(bus_register_notifier);
int bus_unregister_notifier(struct bus_type *bus, struct notifier_block *nb)
{
- return blocking_notifier_chain_unregister(&bus->bus_notifier, nb);
+ return blocking_notifier_chain_unregister(&bus->p->bus_notifier, nb);
}
EXPORT_SYMBOL_GPL(bus_unregister_notifier);
-int __init buses_init(void)
+struct kset *bus_get_kset(struct bus_type *bus)
{
- return subsystem_register(&bus_subsys);
+ return &bus->p->subsys;
}
+EXPORT_SYMBOL_GPL(bus_get_kset);
+struct klist *bus_get_device_klist(struct bus_type *bus)
+{
+ return &bus->p->klist_devices;
+}
+EXPORT_SYMBOL_GPL(bus_get_device_klist);
-EXPORT_SYMBOL_GPL(bus_for_each_dev);
-EXPORT_SYMBOL_GPL(bus_find_device);
-EXPORT_SYMBOL_GPL(bus_for_each_drv);
-
-EXPORT_SYMBOL_GPL(bus_register);
-EXPORT_SYMBOL_GPL(bus_unregister);
-EXPORT_SYMBOL_GPL(bus_rescan_devices);
-
-EXPORT_SYMBOL_GPL(bus_create_file);
-EXPORT_SYMBOL_GPL(bus_remove_file);
+int __init buses_init(void)
+{
+ bus_kset = kset_create_and_add("bus", &bus_uevent_ops, NULL);
+ if (!bus_kset)
+ return -ENOMEM;
+ return 0;
+}
diff --git a/drivers/base/class.c b/drivers/base/class.c
index a863bb091e11..59cf35894cfc 100644
--- a/drivers/base/class.c
+++ b/drivers/base/class.c
@@ -17,16 +17,17 @@
#include <linux/kdev_t.h>
#include <linux/err.h>
#include <linux/slab.h>
+#include <linux/genhd.h>
#include "base.h"
#define to_class_attr(_attr) container_of(_attr, struct class_attribute, attr)
#define to_class(obj) container_of(obj, struct class, subsys.kobj)
-static ssize_t
-class_attr_show(struct kobject * kobj, struct attribute * attr, char * buf)
+static ssize_t class_attr_show(struct kobject *kobj, struct attribute *attr,
+ char *buf)
{
- struct class_attribute * class_attr = to_class_attr(attr);
- struct class * dc = to_class(kobj);
+ struct class_attribute *class_attr = to_class_attr(attr);
+ struct class *dc = to_class(kobj);
ssize_t ret = -EIO;
if (class_attr->show)
@@ -34,12 +35,11 @@ class_attr_show(struct kobject * kobj, struct attribute * attr, char * buf)
return ret;
}
-static ssize_t
-class_attr_store(struct kobject * kobj, struct attribute * attr,
- const char * buf, size_t count)
+static ssize_t class_attr_store(struct kobject *kobj, struct attribute *attr,
+ const char *buf, size_t count)
{
- struct class_attribute * class_attr = to_class_attr(attr);
- struct class * dc = to_class(kobj);
+ struct class_attribute *class_attr = to_class_attr(attr);
+ struct class *dc = to_class(kobj);
ssize_t ret = -EIO;
if (class_attr->store)
@@ -47,7 +47,7 @@ class_attr_store(struct kobject * kobj, struct attribute * attr,
return ret;
}
-static void class_release(struct kobject * kobj)
+static void class_release(struct kobject *kobj)
{
struct class *class = to_class(kobj);
@@ -71,20 +71,20 @@ static struct kobj_type class_ktype = {
};
/* Hotplug events for classes go to the class_obj subsys */
-static decl_subsys(class, &class_ktype, NULL);
+static struct kset *class_kset;
-int class_create_file(struct class * cls, const struct class_attribute * attr)
+int class_create_file(struct class *cls, const struct class_attribute *attr)
{
int error;
- if (cls) {
+ if (cls)
error = sysfs_create_file(&cls->subsys.kobj, &attr->attr);
- } else
+ else
error = -EINVAL;
return error;
}
-void class_remove_file(struct class * cls, const struct class_attribute * attr)
+void class_remove_file(struct class *cls, const struct class_attribute *attr)
{
if (cls)
sysfs_remove_file(&cls->subsys.kobj, &attr->attr);
@@ -93,48 +93,48 @@ void class_remove_file(struct class * cls, const struct class_attribute * attr)
static struct class *class_get(struct class *cls)
{
if (cls)
- return container_of(kset_get(&cls->subsys), struct class, subsys);
+ return container_of(kset_get(&cls->subsys),
+ struct class, subsys);
return NULL;
}
-static void class_put(struct class * cls)
+static void class_put(struct class *cls)
{
if (cls)
kset_put(&cls->subsys);
}
-
-static int add_class_attrs(struct class * cls)
+static int add_class_attrs(struct class *cls)
{
int i;
int error = 0;
if (cls->class_attrs) {
for (i = 0; attr_name(cls->class_attrs[i]); i++) {
- error = class_create_file(cls,&cls->class_attrs[i]);
+ error = class_create_file(cls, &cls->class_attrs[i]);
if (error)
- goto Err;
+ goto error;
}
}
- Done:
+done:
return error;
- Err:
+error:
while (--i >= 0)
- class_remove_file(cls,&cls->class_attrs[i]);
- goto Done;
+ class_remove_file(cls, &cls->class_attrs[i]);
+ goto done;
}
-static void remove_class_attrs(struct class * cls)
+static void remove_class_attrs(struct class *cls)
{
int i;
if (cls->class_attrs) {
for (i = 0; attr_name(cls->class_attrs[i]); i++)
- class_remove_file(cls,&cls->class_attrs[i]);
+ class_remove_file(cls, &cls->class_attrs[i]);
}
}
-int class_register(struct class * cls)
+int class_register(struct class *cls)
{
int error;
@@ -149,9 +149,16 @@ int class_register(struct class * cls)
if (error)
return error;
- cls->subsys.kobj.kset = &class_subsys;
+#ifdef CONFIG_SYSFS_DEPRECATED
+ /* let the block class directory show up in the root of sysfs */
+ if (cls != &block_class)
+ cls->subsys.kobj.kset = class_kset;
+#else
+ cls->subsys.kobj.kset = class_kset;
+#endif
+ cls->subsys.kobj.ktype = &class_ktype;
- error = subsystem_register(&cls->subsys);
+ error = kset_register(&cls->subsys);
if (!error) {
error = add_class_attrs(class_get(cls));
class_put(cls);
@@ -159,11 +166,11 @@ int class_register(struct class * cls)
return error;
}
-void class_unregister(struct class * cls)
+void class_unregister(struct class *cls)
{
pr_debug("device class '%s': unregistering\n", cls->name);
remove_class_attrs(cls);
- subsystem_unregister(&cls->subsys);
+ kset_unregister(&cls->subsys);
}
static void class_create_release(struct class *cls)
@@ -241,8 +248,8 @@ void class_destroy(struct class *cls)
/* Class Device Stuff */
-int class_device_create_file(struct class_device * class_dev,
- const struct class_device_attribute * attr)
+int class_device_create_file(struct class_device *class_dev,
+ const struct class_device_attribute *attr)
{
int error = -EINVAL;
if (class_dev)
@@ -250,8 +257,8 @@ int class_device_create_file(struct class_device * class_dev,
return error;
}
-void class_device_remove_file(struct class_device * class_dev,
- const struct class_device_attribute * attr)
+void class_device_remove_file(struct class_device *class_dev,
+ const struct class_device_attribute *attr)
{
if (class_dev)
sysfs_remove_file(&class_dev->kobj, &attr->attr);
@@ -273,12 +280,11 @@ void class_device_remove_bin_file(struct class_device *class_dev,
sysfs_remove_bin_file(&class_dev->kobj, attr);
}
-static ssize_t
-class_device_attr_show(struct kobject * kobj, struct attribute * attr,
- char * buf)
+static ssize_t class_device_attr_show(struct kobject *kobj,
+ struct attribute *attr, char *buf)
{
- struct class_device_attribute * class_dev_attr = to_class_dev_attr(attr);
- struct class_device * cd = to_class_dev(kobj);
+ struct class_device_attribute *class_dev_attr = to_class_dev_attr(attr);
+ struct class_device *cd = to_class_dev(kobj);
ssize_t ret = 0;
if (class_dev_attr->show)
@@ -286,12 +292,12 @@ class_device_attr_show(struct kobject * kobj, struct attribute * attr,
return ret;
}
-static ssize_t
-class_device_attr_store(struct kobject * kobj, struct attribute * attr,
- const char * buf, size_t count)
+static ssize_t class_device_attr_store(struct kobject *kobj,
+ struct attribute *attr,
+ const char *buf, size_t count)
{
- struct class_device_attribute * class_dev_attr = to_class_dev_attr(attr);
- struct class_device * cd = to_class_dev(kobj);
+ struct class_device_attribute *class_dev_attr = to_class_dev_attr(attr);
+ struct class_device *cd = to_class_dev(kobj);
ssize_t ret = 0;
if (class_dev_attr->store)
@@ -304,10 +310,10 @@ static struct sysfs_ops class_dev_sysfs_ops = {
.store = class_device_attr_store,
};
-static void class_dev_release(struct kobject * kobj)
+static void class_dev_release(struct kobject *kobj)
{
struct class_device *cd = to_class_dev(kobj);
- struct class * cls = cd->class;
+ struct class *cls = cd->class;
pr_debug("device class '%s': release.\n", cd->class_id);
@@ -316,8 +322,8 @@ static void class_dev_release(struct kobject * kobj)
else if (cls->release)
cls->release(cd);
else {
- printk(KERN_ERR "Class Device '%s' does not have a release() function, "
- "it is broken and must be fixed.\n",
+ printk(KERN_ERR "Class Device '%s' does not have a release() "
+ "function, it is broken and must be fixed.\n",
cd->class_id);
WARN_ON(1);
}
@@ -428,7 +434,8 @@ static int class_uevent(struct kset *kset, struct kobject *kobj,
add_uevent_var(env, "PHYSDEVBUS=%s", dev->bus->name);
if (dev->driver)
- add_uevent_var(env, "PHYSDEVDRIVER=%s", dev->driver->name);
+ add_uevent_var(env, "PHYSDEVDRIVER=%s",
+ dev->driver->name);
}
if (class_dev->uevent) {
@@ -452,43 +459,49 @@ static struct kset_uevent_ops class_uevent_ops = {
.uevent = class_uevent,
};
-static decl_subsys(class_obj, &class_device_ktype, &class_uevent_ops);
-
+/*
+ * DO NOT copy how this is created, kset_create_and_add() should be
+ * called, but this is a hold-over from the old-way and will be deleted
+ * entirely soon.
+ */
+static struct kset class_obj_subsys = {
+ .uevent_ops = &class_uevent_ops,
+};
-static int class_device_add_attrs(struct class_device * cd)
+static int class_device_add_attrs(struct class_device *cd)
{
int i;
int error = 0;
- struct class * cls = cd->class;
+ struct class *cls = cd->class;
if (cls->class_dev_attrs) {
for (i = 0; attr_name(cls->class_dev_attrs[i]); i++) {
error = class_device_create_file(cd,
- &cls->class_dev_attrs[i]);
+ &cls->class_dev_attrs[i]);
if (error)
- goto Err;
+ goto err;
}
}
- Done:
+done:
return error;
- Err:
+err:
while (--i >= 0)
- class_device_remove_file(cd,&cls->class_dev_attrs[i]);
- goto Done;
+ class_device_remove_file(cd, &cls->class_dev_attrs[i]);
+ goto done;
}
-static void class_device_remove_attrs(struct class_device * cd)
+static void class_device_remove_attrs(struct class_device *cd)
{
int i;
- struct class * cls = cd->class;
+ struct class *cls = cd->class;
if (cls->class_dev_attrs) {
for (i = 0; attr_name(cls->class_dev_attrs[i]); i++)
- class_device_remove_file(cd,&cls->class_dev_attrs[i]);
+ class_device_remove_file(cd, &cls->class_dev_attrs[i]);
}
}
-static int class_device_add_groups(struct class_device * cd)
+static int class_device_add_groups(struct class_device *cd)
{
int i;
int error = 0;
@@ -498,7 +511,8 @@ static int class_device_add_groups(struct class_device * cd)
error = sysfs_create_group(&cd->kobj, cd->groups[i]);
if (error) {
while (--i >= 0)
- sysfs_remove_group(&cd->kobj, cd->groups[i]);
+ sysfs_remove_group(&cd->kobj,
+ cd->groups[i]);
goto out;
}
}
@@ -507,14 +521,12 @@ out:
return error;
}
-static void class_device_remove_groups(struct class_device * cd)
+static void class_device_remove_groups(struct class_device *cd)
{
int i;
- if (cd->groups) {
- for (i = 0; cd->groups[i]; i++) {
+ if (cd->groups)
+ for (i = 0; cd->groups[i]; i++)
sysfs_remove_group(&cd->kobj, cd->groups[i]);
- }
- }
}
static ssize_t show_dev(struct class_device *class_dev, char *buf)
@@ -537,8 +549,8 @@ static struct class_device_attribute class_uevent_attr =
void class_device_initialize(struct class_device *class_dev)
{
- kobj_set_kset_s(class_dev, class_obj_subsys);
- kobject_init(&class_dev->kobj);
+ class_dev->kobj.kset = &class_obj_subsys;
+ kobject_init(&class_dev->kobj, &class_device_ktype);
INIT_LIST_HEAD(&class_dev->node);
}
@@ -566,16 +578,13 @@ int class_device_add(struct class_device *class_dev)
class_dev->class_id);
/* first, register with generic layer. */
- error = kobject_set_name(&class_dev->kobj, "%s", class_dev->class_id);
- if (error)
- goto out2;
-
if (parent_class_dev)
class_dev->kobj.parent = &parent_class_dev->kobj;
else
class_dev->kobj.parent = &parent_class->subsys.kobj;
- error = kobject_add(&class_dev->kobj);
+ error = kobject_add(&class_dev->kobj, class_dev->kobj.parent,
+ "%s", class_dev->class_id);
if (error)
goto out2;
@@ -642,7 +651,7 @@ int class_device_add(struct class_device *class_dev)
out3:
kobject_del(&class_dev->kobj);
out2:
- if(parent_class_dev)
+ if (parent_class_dev)
class_device_put(parent_class_dev);
class_put(parent_class);
out1:
@@ -659,9 +668,11 @@ int class_device_register(struct class_device *class_dev)
/**
* class_device_create - creates a class device and registers it with sysfs
* @cls: pointer to the struct class that this device should be registered to.
- * @parent: pointer to the parent struct class_device of this new device, if any.
+ * @parent: pointer to the parent struct class_device of this new device, if
+ * any.
* @devt: the dev_t for the char device to be added.
- * @device: a pointer to a struct device that is assiociated with this class device.
+ * @device: a pointer to a struct device that is assiociated with this class
+ * device.
* @fmt: string for the class device's name
*
* This function can be used by char device classes. A struct
@@ -785,7 +796,7 @@ void class_device_destroy(struct class *cls, dev_t devt)
class_device_unregister(class_dev);
}
-struct class_device * class_device_get(struct class_device *class_dev)
+struct class_device *class_device_get(struct class_device *class_dev)
{
if (class_dev)
return to_class_dev(kobject_get(&class_dev->kobj));
@@ -798,6 +809,139 @@ void class_device_put(struct class_device *class_dev)
kobject_put(&class_dev->kobj);
}
+/**
+ * class_for_each_device - device iterator
+ * @class: the class we're iterating
+ * @data: data for the callback
+ * @fn: function to be called for each device
+ *
+ * Iterate over @class's list of devices, and call @fn for each,
+ * passing it @data.
+ *
+ * We check the return of @fn each time. If it returns anything
+ * other than 0, we break out and return that value.
+ *
+ * Note, we hold class->sem in this function, so it can not be
+ * re-acquired in @fn, otherwise it will self-deadlocking. For
+ * example, calls to add or remove class members would be verboten.
+ */
+int class_for_each_device(struct class *class, void *data,
+ int (*fn)(struct device *, void *))
+{
+ struct device *dev;
+ int error = 0;
+
+ if (!class)
+ return -EINVAL;
+ down(&class->sem);
+ list_for_each_entry(dev, &class->devices, node) {
+ dev = get_device(dev);
+ if (dev) {
+ error = fn(dev, data);
+ put_device(dev);
+ } else
+ error = -ENODEV;
+ if (error)
+ break;
+ }
+ up(&class->sem);
+
+ return error;
+}
+EXPORT_SYMBOL_GPL(class_for_each_device);
+
+/**
+ * class_find_device - device iterator for locating a particular device
+ * @class: the class we're iterating
+ * @data: data for the match function
+ * @match: function to check device
+ *
+ * This is similar to the class_for_each_dev() function above, but it
+ * returns a reference to a device that is 'found' for later use, as
+ * determined by the @match callback.
+ *
+ * The callback should return 0 if the device doesn't match and non-zero
+ * if it does. If the callback returns non-zero, this function will
+ * return to the caller and not iterate over any more devices.
+
+ * Note, you will need to drop the reference with put_device() after use.
+ *
+ * We hold class->sem in this function, so it can not be
+ * re-acquired in @match, otherwise it will self-deadlocking. For
+ * example, calls to add or remove class members would be verboten.
+ */
+struct device *class_find_device(struct class *class, void *data,
+ int (*match)(struct device *, void *))
+{
+ struct device *dev;
+ int found = 0;
+
+ if (!class)
+ return NULL;
+
+ down(&class->sem);
+ list_for_each_entry(dev, &class->devices, node) {
+ dev = get_device(dev);
+ if (dev) {
+ if (match(dev, data)) {
+ found = 1;
+ break;
+ } else
+ put_device(dev);
+ } else
+ break;
+ }
+ up(&class->sem);
+
+ return found ? dev : NULL;
+}
+EXPORT_SYMBOL_GPL(class_find_device);
+
+/**
+ * class_find_child - device iterator for locating a particular class_device
+ * @class: the class we're iterating
+ * @data: data for the match function
+ * @match: function to check class_device
+ *
+ * This function returns a reference to a class_device that is 'found' for
+ * later use, as determined by the @match callback.
+ *
+ * The callback should return 0 if the class_device doesn't match and non-zero
+ * if it does. If the callback returns non-zero, this function will
+ * return to the caller and not iterate over any more class_devices.
+ *
+ * Note, you will need to drop the reference with class_device_put() after use.
+ *
+ * We hold class->sem in this function, so it can not be
+ * re-acquired in @match, otherwise it will self-deadlocking. For
+ * example, calls to add or remove class members would be verboten.
+ */
+struct class_device *class_find_child(struct class *class, void *data,
+ int (*match)(struct class_device *, void *))
+{
+ struct class_device *dev;
+ int found = 0;
+
+ if (!class)
+ return NULL;
+
+ down(&class->sem);
+ list_for_each_entry(dev, &class->children, node) {
+ dev = class_device_get(dev);
+ if (dev) {
+ if (match(dev, data)) {
+ found = 1;
+ break;
+ } else
+ class_device_put(dev);
+ } else
+ break;
+ }
+ up(&class->sem);
+
+ return found ? dev : NULL;
+}
+EXPORT_SYMBOL_GPL(class_find_child);
int class_interface_register(struct class_interface *class_intf)
{
@@ -829,7 +973,7 @@ int class_interface_register(struct class_interface *class_intf)
void class_interface_unregister(struct class_interface *class_intf)
{
- struct class * parent = class_intf->class;
+ struct class *parent = class_intf->class;
struct class_device *class_dev;
struct device *dev;
@@ -853,15 +997,14 @@ void class_interface_unregister(struct class_interface *class_intf)
int __init classes_init(void)
{
- int retval;
-
- retval = subsystem_register(&class_subsys);
- if (retval)
- return retval;
+ class_kset = kset_create_and_add("class", NULL, NULL);
+ if (!class_kset)
+ return -ENOMEM;
/* ick, this is ugly, the things we go through to keep from showing up
* in sysfs... */
kset_init(&class_obj_subsys);
+ kobject_set_name(&class_obj_subsys.kobj, "class_obj");
if (!class_obj_subsys.kobj.parent)
class_obj_subsys.kobj.parent = &class_obj_subsys.kobj;
return 0;
diff --git a/drivers/base/core.c b/drivers/base/core.c
index 2683eac30c68..edf3bbeb8d6a 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -18,14 +18,14 @@
#include <linux/string.h>
#include <linux/kdev_t.h>
#include <linux/notifier.h>
-
+#include <linux/genhd.h>
#include <asm/semaphore.h>
#include "base.h"
#include "power/power.h"
-int (*platform_notify)(struct device * dev) = NULL;
-int (*platform_notify_remove)(struct device * dev) = NULL;
+int (*platform_notify)(struct device *dev) = NULL;
+int (*platform_notify_remove)(struct device *dev) = NULL;
/*
* sysfs bindings for devices.
@@ -51,11 +51,11 @@ EXPORT_SYMBOL(dev_driver_string);
#define to_dev(obj) container_of(obj, struct device, kobj)
#define to_dev_attr(_attr) container_of(_attr, struct device_attribute, attr)
-static ssize_t
-dev_attr_show(struct kobject * kobj, struct attribute * attr, char * buf)
+static ssize_t dev_attr_show(struct kobject *kobj, struct attribute *attr,
+ char *buf)
{
- struct device_attribute * dev_attr = to_dev_attr(attr);
- struct device * dev = to_dev(kobj);
+ struct device_attribute *dev_attr = to_dev_attr(attr);
+ struct device *dev = to_dev(kobj);
ssize_t ret = -EIO;
if (dev_attr->show)
@@ -63,12 +63,11 @@ dev_attr_show(struct kobject * kobj, struct attribute * attr, char * buf)
return ret;
}
-static ssize_t
-dev_attr_store(struct kobject * kobj, struct attribute * attr,
- const char * buf, size_t count)
+static ssize_t dev_attr_store(struct kobject *kobj, struct attribute *attr,
+ const char *buf, size_t count)
{
- struct device_attribute * dev_attr = to_dev_attr(attr);
- struct device * dev = to_dev(kobj);
+ struct device_attribute *dev_attr = to_dev_attr(attr);
+ struct device *dev = to_dev(kobj);
ssize_t ret = -EIO;
if (dev_attr->store)
@@ -90,9 +89,9 @@ static struct sysfs_ops dev_sysfs_ops = {
* reaches 0. We forward the call to the device's release
* method, which should handle actually freeing the structure.
*/
-static void device_release(struct kobject * kobj)
+static void device_release(struct kobject *kobj)
{
- struct device * dev = to_dev(kobj);
+ struct device *dev = to_dev(kobj);
if (dev->release)
dev->release(dev);
@@ -101,8 +100,8 @@ static void device_release(struct kobject * kobj)
else if (dev->class && dev->class->dev_release)
dev->class->dev_release(dev);
else {
- printk(KERN_ERR "Device '%s' does not have a release() function, "
- "it is broken and must be fixed.\n",
+ printk(KERN_ERR "Device '%s' does not have a release() "
+ "function, it is broken and must be fixed.\n",
dev->bus_id);
WARN_ON(1);
}
@@ -185,7 +184,8 @@ static int dev_uevent(struct kset *kset, struct kobject *kobj,
add_uevent_var(env, "PHYSDEVBUS=%s", dev->bus->name);
if (dev->driver)
- add_uevent_var(env, "PHYSDEVDRIVER=%s", dev->driver->name);
+ add_uevent_var(env, "PHYSDEVDRIVER=%s",
+ dev->driver->name);
}
#endif
@@ -193,15 +193,16 @@ static int dev_uevent(struct kset *kset, struct kobject *kobj,
if (dev->bus && dev->bus->uevent) {
retval = dev->bus->uevent(dev, env);
if (retval)
- pr_debug ("%s: bus uevent() returned %d\n",
- __FUNCTION__, retval);
+ pr_debug("device: '%s': %s: bus uevent() returned %d\n",
+ dev->bus_id, __FUNCTION__, retval);
}
/* have the class specific function add its stuff */
if (dev->class && dev->class->dev_uevent) {
retval = dev->class->dev_uevent(dev, env);
if (retval)
- pr_debug("%s: class uevent() returned %d\n",
+ pr_debug("device: '%s': %s: class uevent() "
+ "returned %d\n", dev->bus_id,
__FUNCTION__, retval);
}
@@ -209,7 +210,8 @@ static int dev_uevent(struct kset *kset, struct kobject *kobj,
if (dev->type && dev->type->uevent) {
retval = dev->type->uevent(dev, env);
if (retval)
- pr_debug("%s: dev_type uevent() returned %d\n",
+ pr_debug("device: '%s': %s: dev_type uevent() "
+ "returned %d\n", dev->bus_id,
__FUNCTION__, retval);
}
@@ -325,7 +327,8 @@ static int device_add_groups(struct device *dev,
error = sysfs_create_group(&dev->kobj, groups[i]);
if (error) {
while (--i >= 0)
- sysfs_remove_group(&dev->kobj, groups[i]);
+ sysfs_remove_group(&dev->kobj,
+ groups[i]);
break;
}
}
@@ -401,20 +404,15 @@ static ssize_t show_dev(struct device *dev, struct device_attribute *attr,
static struct device_attribute devt_attr =
__ATTR(dev, S_IRUGO, show_dev, NULL);
-/*
- * devices_subsys - structure to be registered with kobject core.
- */
-
-decl_subsys(devices, &device_ktype, &device_uevent_ops);
-
+/* kset to create /sys/devices/ */
+struct kset *devices_kset;
/**
- * device_create_file - create sysfs attribute file for device.
- * @dev: device.
- * @attr: device attribute descriptor.
+ * device_create_file - create sysfs attribute file for device.
+ * @dev: device.
+ * @attr: device attribute descriptor.
*/
-
-int device_create_file(struct device * dev, struct device_attribute * attr)
+int device_create_file(struct device *dev, struct device_attribute *attr)
{
int error = 0;
if (get_device(dev)) {
@@ -425,12 +423,11 @@ int device_create_file(struct device * dev, struct device_attribute * attr)
}
/**
- * device_remove_file - remove sysfs attribute file.
- * @dev: device.
- * @attr: device attribute descriptor.
+ * device_remove_file - remove sysfs attribute file.
+ * @dev: device.
+ * @attr: device attribute descriptor.
*/
-
-void device_remove_file(struct device * dev, struct device_attribute * attr)
+void device_remove_file(struct device *dev, struct device_attribute *attr)
{
if (get_device(dev)) {
sysfs_remove_file(&dev->kobj, &attr->attr);
@@ -511,22 +508,20 @@ static void klist_children_put(struct klist_node *n)
put_device(dev);
}
-
/**
- * device_initialize - init device structure.
- * @dev: device.
+ * device_initialize - init device structure.
+ * @dev: device.
*
- * This prepares the device for use by other layers,
- * including adding it to the device hierarchy.
- * It is the first half of device_register(), if called by
- * that, though it can also be called separately, so one
- * may use @dev's fields (e.g. the refcount).
+ * This prepares the device for use by other layers,
+ * including adding it to the device hierarchy.
+ * It is the first half of device_register(), if called by
+ * that, though it can also be called separately, so one
+ * may use @dev's fields (e.g. the refcount).
*/
-
void device_initialize(struct device *dev)
{
- kobj_set_kset_s(dev, devices_subsys);
- kobject_init(&dev->kobj);
+ dev->kobj.kset = devices_kset;
+ kobject_init(&dev->kobj, &device_ktype);
klist_init(&dev->klist_children, klist_children_get,
klist_children_put);
INIT_LIST_HEAD(&dev->dma_pools);
@@ -539,36 +534,39 @@ void device_initialize(struct device *dev)
}
#ifdef CONFIG_SYSFS_DEPRECATED
-static struct kobject * get_device_parent(struct device *dev,
- struct device *parent)
+static struct kobject *get_device_parent(struct device *dev,
+ struct device *parent)
{
- /*
- * Set the parent to the class, not the parent device
- * for topmost devices in class hierarchy.
- * This keeps sysfs from having a symlink to make old
- * udevs happy
- */
+ /* class devices without a parent live in /sys/class/<classname>/ */
if (dev->class && (!parent || parent->class != dev->class))
return &dev->class->subsys.kobj;
+ /* all other devices keep their parent */
else if (parent)
return &parent->kobj;
return NULL;
}
+
+static inline void cleanup_device_parent(struct device *dev) {}
+static inline void cleanup_glue_dir(struct device *dev,
+ struct kobject *glue_dir) {}
#else
static struct kobject *virtual_device_parent(struct device *dev)
{
static struct kobject *virtual_dir = NULL;
if (!virtual_dir)
- virtual_dir = kobject_add_dir(&devices_subsys.kobj, "virtual");
+ virtual_dir = kobject_create_and_add("virtual",
+ &devices_kset->kobj);
return virtual_dir;
}
-static struct kobject * get_device_parent(struct device *dev,
- struct device *parent)
+static struct kobject *get_device_parent(struct device *dev,
+ struct device *parent)
{
+ int retval;
+
if (dev->class) {
struct kobject *kobj = NULL;
struct kobject *parent_kobj;
@@ -576,8 +574,8 @@ static struct kobject * get_device_parent(struct device *dev,
/*
* If we have no parent, we live in "virtual".
- * Class-devices with a bus-device as parent, live
- * in a class-directory to prevent namespace collisions.
+ * Class-devices with a non class-device as parent, live
+ * in a "glue" directory to prevent namespace collisions.
*/
if (parent == NULL)
parent_kobj = virtual_device_parent(dev);
@@ -598,25 +596,45 @@ static struct kobject * get_device_parent(struct device *dev,
return kobj;
/* or create a new class-directory at the parent device */
- return kobject_kset_add_dir(&dev->class->class_dirs,
- parent_kobj, dev->class->name);
+ k = kobject_create();
+ if (!k)
+ return NULL;
+ k->kset = &dev->class->class_dirs;
+ retval = kobject_add(k, parent_kobj, "%s", dev->class->name);
+ if (retval < 0) {
+ kobject_put(k);
+ return NULL;
+ }
+ /* do not emit an uevent for this simple "glue" directory */
+ return k;
}
if (parent)
return &parent->kobj;
return NULL;
}
+
+static void cleanup_glue_dir(struct device *dev, struct kobject *glue_dir)
+{
+ /* see if we live in a "glue" directory */
+ if (!dev->class || glue_dir->kset != &dev->class->class_dirs)
+ return;
+
+ kobject_put(glue_dir);
+}
+
+static void cleanup_device_parent(struct device *dev)
+{
+ cleanup_glue_dir(dev, dev->kobj.parent);
+}
#endif
-static int setup_parent(struct device *dev, struct device *parent)
+static void setup_parent(struct device *dev, struct device *parent)
{
struct kobject *kobj;
kobj = get_device_parent(dev, parent);
- if (IS_ERR(kobj))
- return PTR_ERR(kobj);
if (kobj)
dev->kobj.parent = kobj;
- return 0;
}
static int device_add_class_symlinks(struct device *dev)
@@ -625,65 +643,76 @@ static int device_add_class_symlinks(struct device *dev)
if (!dev->class)
return 0;
+
error = sysfs_create_link(&dev->kobj, &dev->class->subsys.kobj,
"subsystem");
if (error)
goto out;
- /*
- * If this is not a "fake" compatible device, then create the
- * symlink from the class to the device.
- */
- if (dev->kobj.parent != &dev->class->subsys.kobj) {
+
+#ifdef CONFIG_SYSFS_DEPRECATED
+ /* stacked class devices need a symlink in the class directory */
+ if (dev->kobj.parent != &dev->class->subsys.kobj &&
+ dev->type != &part_type) {
error = sysfs_create_link(&dev->class->subsys.kobj, &dev->kobj,
dev->bus_id);
if (error)
goto out_subsys;
}
- if (dev->parent) {
-#ifdef CONFIG_SYSFS_DEPRECATED
- {
- struct device *parent = dev->parent;
- char *class_name;
-
- /*
- * In old sysfs stacked class devices had 'device'
- * link pointing to real device instead of parent
- */
- while (parent->class && !parent->bus && parent->parent)
- parent = parent->parent;
-
- error = sysfs_create_link(&dev->kobj,
- &parent->kobj,
- "device");
- if (error)
- goto out_busid;
- class_name = make_class_name(dev->class->name,
- &dev->kobj);
- if (class_name)
- error = sysfs_create_link(&dev->parent->kobj,
- &dev->kobj, class_name);
- kfree(class_name);
- if (error)
- goto out_device;
- }
-#else
- error = sysfs_create_link(&dev->kobj, &dev->parent->kobj,
+ if (dev->parent && dev->type != &part_type) {
+ struct device *parent = dev->parent;
+ char *class_name;
+
+ /*
+ * stacked class devices have the 'device' link
+ * pointing to the bus device instead of the parent
+ */
+ while (parent->class && !parent->bus && parent->parent)
+ parent = parent->parent;
+
+ error = sysfs_create_link(&dev->kobj,
+ &parent->kobj,
"device");
if (error)
goto out_busid;
-#endif
+
+ class_name = make_class_name(dev->class->name,
+ &dev->kobj);
+ if (class_name)
+ error = sysfs_create_link(&dev->parent->kobj,
+ &dev->kobj, class_name);
+ kfree(class_name);
+ if (error)
+ goto out_device;
}
return 0;
-#ifdef CONFIG_SYSFS_DEPRECATED
out_device:
- if (dev->parent)
+ if (dev->parent && dev->type != &part_type)
sysfs_remove_link(&dev->kobj, "device");
-#endif
out_busid:
- if (dev->kobj.parent != &dev->class->subsys.kobj)
+ if (dev->kobj.parent != &dev->class->subsys.kobj &&
+ dev->type != &part_type)
sysfs_remove_link(&dev->class->subsys.kobj, dev->bus_id);
+#else
+ /* link in the class directory pointing to the device */
+ error = sysfs_create_link(&dev->class->subsys.kobj, &dev->kobj,
+ dev->bus_id);
+ if (error)
+ goto out_subsys;
+
+ if (dev->parent && dev->type != &part_type) {
+ error = sysfs_create_link(&dev->kobj, &dev->parent->kobj,
+ "device");
+ if (error)
+ goto out_busid;
+ }
+ return 0;
+
+out_busid:
+ sysfs_remove_link(&dev->class->subsys.kobj, dev->bus_id);
+#endif
+
out_subsys:
sysfs_remove_link(&dev->kobj, "subsystem");
out:
@@ -694,8 +723,9 @@ static void device_remove_class_symlinks(struct device *dev)
{
if (!dev->class)
return;
- if (dev->parent) {
+
#ifdef CONFIG_SYSFS_DEPRECATED
+ if (dev->parent && dev->type != &part_type) {
char *class_name;
class_name = make_class_name(dev->class->name, &dev->kobj);
@@ -703,45 +733,59 @@ static void device_remove_class_symlinks(struct device *dev)
sysfs_remove_link(&dev->parent->kobj, class_name);
kfree(class_name);
}
-#endif
sysfs_remove_link(&dev->kobj, "device");
}
- if (dev->kobj.parent != &dev->class->subsys.kobj)
+
+ if (dev->kobj.parent != &dev->class->subsys.kobj &&
+ dev->type != &part_type)
sysfs_remove_link(&dev->class->subsys.kobj, dev->bus_id);
+#else
+ if (dev->parent && dev->type != &part_type)
+ sysfs_remove_link(&dev->kobj, "device");
+
+ sysfs_remove_link(&dev->class->subsys.kobj, dev->bus_id);
+#endif
+
sysfs_remove_link(&dev->kobj, "subsystem");
}
/**
- * device_add - add device to device hierarchy.
- * @dev: device.
+ * device_add - add device to device hierarchy.
+ * @dev: device.
*
- * This is part 2 of device_register(), though may be called
- * separately _iff_ device_initialize() has been called separately.
+ * This is part 2 of device_register(), though may be called
+ * separately _iff_ device_initialize() has been called separately.
*
- * This adds it to the kobject hierarchy via kobject_add(), adds it
- * to the global and sibling lists for the device, then
- * adds it to the other relevant subsystems of the driver model.
+ * This adds it to the kobject hierarchy via kobject_add(), adds it
+ * to the global and sibling lists for the device, then
+ * adds it to the other relevant subsystems of the driver model.
*/
int device_add(struct device *dev)
{
struct device *parent = NULL;
struct class_interface *class_intf;
- int error = -EINVAL;
+ int error;
+
+ error = pm_sleep_lock();
+ if (error) {
+ dev_warn(dev, "Suspicious %s during suspend\n", __FUNCTION__);
+ dump_stack();
+ return error;
+ }
dev = get_device(dev);
- if (!dev || !strlen(dev->bus_id))
+ if (!dev || !strlen(dev->bus_id)) {
+ error = -EINVAL;
goto Error;
+ }
- pr_debug("DEV: registering device: ID = '%s'\n", dev->bus_id);
+ pr_debug("device: '%s': %s\n", dev->bus_id, __FUNCTION__);
parent = get_device(dev->parent);
- error = setup_parent(dev, parent);
- if (error)
- goto Error;
+ setup_parent(dev, parent);
/* first, register with generic layer. */
- kobject_set_name(&dev->kobj, "%s", dev->bus_id);
- error = kobject_add(&dev->kobj);
+ error = kobject_add(&dev->kobj, dev->kobj.parent, "%s", dev->bus_id);
if (error)
goto Error;
@@ -751,7 +795,7 @@ int device_add(struct device *dev)
/* notify clients of device entry (new way) */
if (dev->bus)
- blocking_notifier_call_chain(&dev->bus->bus_notifier,
+ blocking_notifier_call_chain(&dev->bus->p->bus_notifier,
BUS_NOTIFY_ADD_DEVICE, dev);
error = device_create_file(dev, &uevent_attr);
@@ -795,13 +839,14 @@ int device_add(struct device *dev)
}
Done:
put_device(dev);
+ pm_sleep_unlock();
return error;
BusError:
device_pm_remove(dev);
dpm_sysfs_remove(dev);
PMError:
if (dev->bus)
- blocking_notifier_call_chain(&dev->bus->bus_notifier,
+ blocking_notifier_call_chain(&dev->bus->p->bus_notifier,
BUS_NOTIFY_DEL_DEVICE, dev);
device_remove_attrs(dev);
AttrsError:
@@ -809,124 +854,84 @@ int device_add(struct device *dev)
SymlinkError:
if (MAJOR(dev->devt))
device_remove_file(dev, &devt_attr);
-
- if (dev->class) {
- sysfs_remove_link(&dev->kobj, "subsystem");
- /* If this is not a "fake" compatible device, remove the
- * symlink from the class to the device. */
- if (dev->kobj.parent != &dev->class->subsys.kobj)
- sysfs_remove_link(&dev->class->subsys.kobj,
- dev->bus_id);
- if (parent) {
-#ifdef CONFIG_SYSFS_DEPRECATED
- char *class_name = make_class_name(dev->class->name,
- &dev->kobj);
- if (class_name)
- sysfs_remove_link(&dev->parent->kobj,
- class_name);
- kfree(class_name);
-#endif
- sysfs_remove_link(&dev->kobj, "device");
- }
- }
ueventattrError:
device_remove_file(dev, &uevent_attr);
attrError:
kobject_uevent(&dev->kobj, KOBJ_REMOVE);
kobject_del(&dev->kobj);
Error:
+ cleanup_device_parent(dev);
if (parent)
put_device(parent);
goto Done;
}
-
/**
- * device_register - register a device with the system.
- * @dev: pointer to the device structure
+ * device_register - register a device with the system.
+ * @dev: pointer to the device structure
*
- * This happens in two clean steps - initialize the device
- * and add it to the system. The two steps can be called
- * separately, but this is the easiest and most common.
- * I.e. you should only call the two helpers separately if
- * have a clearly defined need to use and refcount the device
- * before it is added to the hierarchy.
+ * This happens in two clean steps - initialize the device
+ * and add it to the system. The two steps can be called
+ * separately, but this is the easiest and most common.
+ * I.e. you should only call the two helpers separately if
+ * have a clearly defined need to use and refcount the device
+ * before it is added to the hierarchy.
*/
-
int device_register(struct device *dev)
{
device_initialize(dev);
return device_add(dev);
}
-
/**
- * get_device - increment reference count for device.
- * @dev: device.
+ * get_device - increment reference count for device.
+ * @dev: device.
*
- * This simply forwards the call to kobject_get(), though
- * we do take care to provide for the case that we get a NULL
- * pointer passed in.
+ * This simply forwards the call to kobject_get(), though
+ * we do take care to provide for the case that we get a NULL
+ * pointer passed in.
*/
-
-struct device * get_device(struct device * dev)
+struct device *get_device(struct device *dev)
{
return dev ? to_dev(kobject_get(&dev->kobj)) : NULL;
}
-
/**
- * put_device - decrement reference count.
- * @dev: device in question.
+ * put_device - decrement reference count.
+ * @dev: device in question.
*/
-void put_device(struct device * dev)
+void put_device(struct device *dev)
{
+ /* might_sleep(); */
if (dev)
kobject_put(&dev->kobj);
}
-
/**
- * device_del - delete device from system.
- * @dev: device.
+ * device_del - delete device from system.
+ * @dev: device.
*
- * This is the first part of the device unregistration
- * sequence. This removes the device from the lists we control
- * from here, has it removed from the other driver model
- * subsystems it was added to in device_add(), and removes it
- * from the kobject hierarchy.
+ * This is the first part of the device unregistration
+ * sequence. This removes the device from the lists we control
+ * from here, has it removed from the other driver model
+ * subsystems it was added to in device_add(), and removes it
+ * from the kobject hierarchy.
*
- * NOTE: this should be called manually _iff_ device_add() was
- * also called manually.
+ * NOTE: this should be called manually _iff_ device_add() was
+ * also called manually.
*/
-
-void device_del(struct device * dev)
+void device_del(struct device *dev)
{
- struct device * parent = dev->parent;
+ struct device *parent = dev->parent;
struct class_interface *class_intf;
+ device_pm_remove(dev);
if (parent)
klist_del(&dev->knode_parent);
if (MAJOR(dev->devt))
device_remove_file(dev, &devt_attr);
if (dev->class) {
- sysfs_remove_link(&dev->kobj, "subsystem");
- /* If this is not a "fake" compatible device, remove the
- * symlink from the class to the device. */
- if (dev->kobj.parent != &dev->class->subsys.kobj)
- sysfs_remove_link(&dev->class->subsys.kobj,
- dev->bus_id);
- if (parent) {
-#ifdef CONFIG_SYSFS_DEPRECATED
- char *class_name = make_class_name(dev->class->name,
- &dev->kobj);
- if (class_name)
- sysfs_remove_link(&dev->parent->kobj,
- class_name);
- kfree(class_name);
-#endif
- sysfs_remove_link(&dev->kobj, "device");
- }
+ device_remove_class_symlinks(dev);
down(&dev->class->sem);
/* notify any interfaces that the device is now gone */
@@ -936,31 +941,6 @@ void device_del(struct device * dev)
/* remove the device from the class list */
list_del_init(&dev->node);
up(&dev->class->sem);
-
- /* If we live in a parent class-directory, unreference it */
- if (dev->kobj.parent->kset == &dev->class->class_dirs) {
- struct device *d;
- int other = 0;
-
- /*
- * if we are the last child of our class, delete
- * our class-directory at this parent
- */
- down(&dev->class->sem);
- list_for_each_entry(d, &dev->class->devices, node) {
- if (d == dev)
- continue;
- if (d->kobj.parent == dev->kobj.parent) {
- other = 1;
- break;
- }
- }
- if (!other)
- kobject_del(dev->kobj.parent);
-
- kobject_put(dev->kobj.parent);
- up(&dev->class->sem);
- }
}
device_remove_file(dev, &uevent_attr);
device_remove_attrs(dev);
@@ -979,57 +959,55 @@ void device_del(struct device * dev)
if (platform_notify_remove)
platform_notify_remove(dev);
if (dev->bus)
- blocking_notifier_call_chain(&dev->bus->bus_notifier,
+ blocking_notifier_call_chain(&dev->bus->p->bus_notifier,
BUS_NOTIFY_DEL_DEVICE, dev);
- device_pm_remove(dev);
kobject_uevent(&dev->kobj, KOBJ_REMOVE);
+ cleanup_device_parent(dev);
kobject_del(&dev->kobj);
- if (parent)
- put_device(parent);
+ put_device(parent);
}
/**
- * device_unregister - unregister device from system.
- * @dev: device going away.
+ * device_unregister - unregister device from system.
+ * @dev: device going away.
*
- * We do this in two parts, like we do device_register(). First,
- * we remove it from all the subsystems with device_del(), then
- * we decrement the reference count via put_device(). If that
- * is the final reference count, the device will be cleaned up
- * via device_release() above. Otherwise, the structure will
- * stick around until the final reference to the device is dropped.
+ * We do this in two parts, like we do device_register(). First,
+ * we remove it from all the subsystems with device_del(), then
+ * we decrement the reference count via put_device(). If that
+ * is the final reference count, the device will be cleaned up
+ * via device_release() above. Otherwise, the structure will
+ * stick around until the final reference to the device is dropped.
*/
-void device_unregister(struct device * dev)
+void device_unregister(struct device *dev)
{
- pr_debug("DEV: Unregistering device. ID = '%s'\n", dev->bus_id);
+ pr_debug("device: '%s': %s\n", dev->bus_id, __FUNCTION__);
device_del(dev);
put_device(dev);
}
-
-static struct device * next_device(struct klist_iter * i)
+static struct device *next_device(struct klist_iter *i)
{
- struct klist_node * n = klist_next(i);
+ struct klist_node *n = klist_next(i);
return n ? container_of(n, struct device, knode_parent) : NULL;
}
/**
- * device_for_each_child - device child iterator.
- * @parent: parent struct device.
- * @data: data for the callback.
- * @fn: function to be called for each device.
+ * device_for_each_child - device child iterator.
+ * @parent: parent struct device.
+ * @data: data for the callback.
+ * @fn: function to be called for each device.
*
- * Iterate over @parent's child devices, and call @fn for each,
- * passing it @data.
+ * Iterate over @parent's child devices, and call @fn for each,
+ * passing it @data.
*
- * We check the return of @fn each time. If it returns anything
- * other than 0, we break out and return that value.
+ * We check the return of @fn each time. If it returns anything
+ * other than 0, we break out and return that value.
*/
-int device_for_each_child(struct device * parent, void * data,
- int (*fn)(struct device *, void *))
+int device_for_each_child(struct device *parent, void *data,
+ int (*fn)(struct device *dev, void *data))
{
struct klist_iter i;
- struct device * child;
+ struct device *child;
int error = 0;
klist_iter_init(&parent->klist_children, &i);
@@ -1054,8 +1032,8 @@ int device_for_each_child(struct device * parent, void * data,
* current device can be obtained, this function will return to the caller
* and not iterate over any more devices.
*/
-struct device * device_find_child(struct device *parent, void *data,
- int (*match)(struct device *, void *))
+struct device *device_find_child(struct device *parent, void *data,
+ int (*match)(struct device *dev, void *data))
{
struct klist_iter i;
struct device *child;
@@ -1073,7 +1051,10 @@ struct device * device_find_child(struct device *parent, void *data,
int __init devices_init(void)
{
- return subsystem_register(&devices_subsys);
+ devices_kset = kset_create_and_add("devices", &device_uevent_ops, NULL);
+ if (!devices_kset)
+ return -ENOMEM;
+ return 0;
}
EXPORT_SYMBOL_GPL(device_for_each_child);
@@ -1094,7 +1075,7 @@ EXPORT_SYMBOL_GPL(device_remove_file);
static void device_create_release(struct device *dev)
{
- pr_debug("%s called for %s\n", __FUNCTION__, dev->bus_id);
+ pr_debug("device: '%s': %s\n", dev->bus_id, __FUNCTION__);
kfree(dev);
}
@@ -1156,14 +1137,11 @@ error:
EXPORT_SYMBOL_GPL(device_create);
/**
- * device_destroy - removes a device that was created with device_create()
+ * find_device - finds a device that was created with device_create()
* @class: pointer to the struct class that this device was registered with
* @devt: the dev_t of the device that was previously registered
- *
- * This call unregisters and cleans up a device that was created with a
- * call to device_create().
*/
-void device_destroy(struct class *class, dev_t devt)
+static struct device *find_device(struct class *class, dev_t devt)
{
struct device *dev = NULL;
struct device *dev_tmp;
@@ -1176,12 +1154,54 @@ void device_destroy(struct class *class, dev_t devt)
}
}
up(&class->sem);
+ return dev;
+}
+
+/**
+ * device_destroy - removes a device that was created with device_create()
+ * @class: pointer to the struct class that this device was registered with
+ * @devt: the dev_t of the device that was previously registered
+ *
+ * This call unregisters and cleans up a device that was created with a
+ * call to device_create().
+ */
+void device_destroy(struct class *class, dev_t devt)
+{
+ struct device *dev;
+ dev = find_device(class, devt);
if (dev)
device_unregister(dev);
}
EXPORT_SYMBOL_GPL(device_destroy);
+#ifdef CONFIG_PM_SLEEP
+/**
+ * destroy_suspended_device - asks the PM core to remove a suspended device
+ * @class: pointer to the struct class that this device was registered with
+ * @devt: the dev_t of the device that was previously registered
+ *
+ * This call notifies the PM core of the necessity to unregister a suspended
+ * device created with a call to device_create() (devices cannot be
+ * unregistered directly while suspended, since the PM core holds their
+ * semaphores at that time).
+ *
+ * It can only be called within the scope of a system sleep transition. In
+ * practice this means it has to be directly or indirectly invoked either by
+ * a suspend or resume method, or by the PM core (e.g. via
+ * disable_nonboot_cpus() or enable_nonboot_cpus()).
+ */
+void destroy_suspended_device(struct class *class, dev_t devt)
+{
+ struct device *dev;
+
+ dev = find_device(class, devt);
+ if (dev)
+ device_pm_schedule_removal(dev);
+}
+EXPORT_SYMBOL_GPL(destroy_suspended_device);
+#endif /* CONFIG_PM_SLEEP */
+
/**
* device_rename - renames a device
* @dev: the pointer to the struct device to be renamed
@@ -1198,7 +1218,8 @@ int device_rename(struct device *dev, char *new_name)
if (!dev)
return -EINVAL;
- pr_debug("DEVICE: renaming '%s' to '%s'\n", dev->bus_id, new_name);
+ pr_debug("device: '%s': %s: renaming to '%s'\n", dev->bus_id,
+ __FUNCTION__, new_name);
#ifdef CONFIG_SYSFS_DEPRECATED
if ((dev->class) && (dev->parent))
@@ -1279,8 +1300,7 @@ static int device_move_class_links(struct device *dev,
class_name);
if (error)
sysfs_remove_link(&dev->kobj, "device");
- }
- else
+ } else
error = 0;
out:
kfree(class_name);
@@ -1311,16 +1331,13 @@ int device_move(struct device *dev, struct device *new_parent)
return -EINVAL;
new_parent = get_device(new_parent);
- new_parent_kobj = get_device_parent (dev, new_parent);
- if (IS_ERR(new_parent_kobj)) {
- error = PTR_ERR(new_parent_kobj);
- put_device(new_parent);
- goto out;
- }
- pr_debug("DEVICE: moving '%s' to '%s'\n", dev->bus_id,
- new_parent ? new_parent->bus_id : "<NULL>");
+ new_parent_kobj = get_device_parent(dev, new_parent);
+
+ pr_debug("device: '%s': %s: moving to '%s'\n", dev->bus_id,
+ __FUNCTION__, new_parent ? new_parent->bus_id : "<NULL>");
error = kobject_move(&dev->kobj, new_parent_kobj);
if (error) {
+ cleanup_glue_dir(dev, new_parent_kobj);
put_device(new_parent);
goto out;
}
@@ -1343,6 +1360,7 @@ int device_move(struct device *dev, struct device *new_parent)
klist_add_tail(&dev->knode_parent,
&old_parent->klist_children);
}
+ cleanup_glue_dir(dev, new_parent_kobj);
put_device(new_parent);
goto out;
}
@@ -1352,5 +1370,23 @@ out:
put_device(dev);
return error;
}
-
EXPORT_SYMBOL_GPL(device_move);
+
+/**
+ * device_shutdown - call ->shutdown() on each device to shutdown.
+ */
+void device_shutdown(void)
+{
+ struct device *dev, *devn;
+
+ list_for_each_entry_safe_reverse(dev, devn, &devices_kset->list,
+ kobj.entry) {
+ if (dev->bus && dev->bus->shutdown) {
+ dev_dbg(dev, "shutdown\n");
+ dev->bus->shutdown(dev);
+ } else if (dev->driver && dev->driver->shutdown) {
+ dev_dbg(dev, "shutdown\n");
+ dev->driver->shutdown(dev);
+ }
+ }
+}
diff --git a/drivers/base/cpu.c b/drivers/base/cpu.c
index 40545071e3c9..c5885f5ce0ac 100644
--- a/drivers/base/cpu.c
+++ b/drivers/base/cpu.c
@@ -14,7 +14,7 @@
#include "base.h"
struct sysdev_class cpu_sysdev_class = {
- set_kset_name("cpu"),
+ .name = "cpu",
};
EXPORT_SYMBOL(cpu_sysdev_class);
diff --git a/drivers/base/dd.c b/drivers/base/dd.c
index 7ac474db88c5..a5cde94bb982 100644
--- a/drivers/base/dd.c
+++ b/drivers/base/dd.c
@@ -1,18 +1,20 @@
/*
- * drivers/base/dd.c - The core device/driver interactions.
+ * drivers/base/dd.c - The core device/driver interactions.
*
- * This file contains the (sometimes tricky) code that controls the
- * interactions between devices and drivers, which primarily includes
- * driver binding and unbinding.
+ * This file contains the (sometimes tricky) code that controls the
+ * interactions between devices and drivers, which primarily includes
+ * driver binding and unbinding.
*
- * All of this code used to exist in drivers/base/bus.c, but was
- * relocated to here in the name of compartmentalization (since it wasn't
- * strictly code just for the 'struct bus_type'.
+ * All of this code used to exist in drivers/base/bus.c, but was
+ * relocated to here in the name of compartmentalization (since it wasn't
+ * strictly code just for the 'struct bus_type'.
*
- * Copyright (c) 2002-5 Patrick Mochel
- * Copyright (c) 2002-3 Open Source Development Labs
+ * Copyright (c) 2002-5 Patrick Mochel
+ * Copyright (c) 2002-3 Open Source Development Labs
+ * Copyright (c) 2007 Greg Kroah-Hartman <gregkh@suse.de>
+ * Copyright (c) 2007 Novell Inc.
*
- * This file is released under the GPLv2
+ * This file is released under the GPLv2
*/
#include <linux/device.h>
@@ -23,8 +25,6 @@
#include "base.h"
#include "power/power.h"
-#define to_drv(node) container_of(node, struct device_driver, kobj.entry)
-
static void driver_bound(struct device *dev)
{
@@ -34,27 +34,27 @@ static void driver_bound(struct device *dev)
return;
}
- pr_debug("bound device '%s' to driver '%s'\n",
- dev->bus_id, dev->driver->name);
+ pr_debug("driver: '%s': %s: bound to device '%s'\n", dev->bus_id,
+ __FUNCTION__, dev->driver->name);
if (dev->bus)
- blocking_notifier_call_chain(&dev->bus->bus_notifier,
+ blocking_notifier_call_chain(&dev->bus->p->bus_notifier,
BUS_NOTIFY_BOUND_DRIVER, dev);
- klist_add_tail(&dev->knode_driver, &dev->driver->klist_devices);
+ klist_add_tail(&dev->knode_driver, &dev->driver->p->klist_devices);
}
static int driver_sysfs_add(struct device *dev)
{
int ret;
- ret = sysfs_create_link(&dev->driver->kobj, &dev->kobj,
+ ret = sysfs_create_link(&dev->driver->p->kobj, &dev->kobj,
kobject_name(&dev->kobj));
if (ret == 0) {
- ret = sysfs_create_link(&dev->kobj, &dev->driver->kobj,
+ ret = sysfs_create_link(&dev->kobj, &dev->driver->p->kobj,
"driver");
if (ret)
- sysfs_remove_link(&dev->driver->kobj,
+ sysfs_remove_link(&dev->driver->p->kobj,
kobject_name(&dev->kobj));
}
return ret;
@@ -65,24 +65,24 @@ static void driver_sysfs_remove(struct device *dev)
struct device_driver *drv = dev->driver;
if (drv) {
- sysfs_remove_link(&drv->kobj, kobject_name(&dev->kobj));
+ sysfs_remove_link(&drv->p->kobj, kobject_name(&dev->kobj));
sysfs_remove_link(&dev->kobj, "driver");
}
}
/**
- * device_bind_driver - bind a driver to one device.
- * @dev: device.
+ * device_bind_driver - bind a driver to one device.
+ * @dev: device.
*
- * Allow manual attachment of a driver to a device.
- * Caller must have already set @dev->driver.
+ * Allow manual attachment of a driver to a device.
+ * Caller must have already set @dev->driver.
*
- * Note that this does not modify the bus reference count
- * nor take the bus's rwsem. Please verify those are accounted
- * for before calling this. (It is ok to call with no other effort
- * from a driver's probe() method.)
+ * Note that this does not modify the bus reference count
+ * nor take the bus's rwsem. Please verify those are accounted
+ * for before calling this. (It is ok to call with no other effort
+ * from a driver's probe() method.)
*
- * This function must be called with @dev->sem held.
+ * This function must be called with @dev->sem held.
*/
int device_bind_driver(struct device *dev)
{
@@ -93,6 +93,7 @@ int device_bind_driver(struct device *dev)
driver_bound(dev);
return ret;
}
+EXPORT_SYMBOL_GPL(device_bind_driver);
static atomic_t probe_count = ATOMIC_INIT(0);
static DECLARE_WAIT_QUEUE_HEAD(probe_waitqueue);
@@ -102,8 +103,8 @@ static int really_probe(struct device *dev, struct device_driver *drv)
int ret = 0;
atomic_inc(&probe_count);
- pr_debug("%s: Probing driver %s with device %s\n",
- drv->bus->name, drv->name, dev->bus_id);
+ pr_debug("bus: '%s': %s: probing driver %s with device %s\n",
+ drv->bus->name, __FUNCTION__, drv->name, dev->bus_id);
WARN_ON(!list_empty(&dev->devres_head));
dev->driver = drv;
@@ -125,8 +126,8 @@ static int really_probe(struct device *dev, struct device_driver *drv)
driver_bound(dev);
ret = 1;
- pr_debug("%s: Bound Device %s to Driver %s\n",
- drv->bus->name, dev->bus_id, drv->name);
+ pr_debug("bus: '%s': %s: bound device %s to driver %s\n",
+ drv->bus->name, __FUNCTION__, dev->bus_id, drv->name);
goto done;
probe_failed:
@@ -183,7 +184,7 @@ int driver_probe_done(void)
* This function must be called with @dev->sem held. When called for a
* USB interface, @dev->parent->sem must be held as well.
*/
-int driver_probe_device(struct device_driver * drv, struct device * dev)
+int driver_probe_device(struct device_driver *drv, struct device *dev)
{
int ret = 0;
@@ -192,8 +193,8 @@ int driver_probe_device(struct device_driver * drv, struct device * dev)
if (drv->bus->match && !drv->bus->match(dev, drv))
goto done;
- pr_debug("%s: Matched Device %s with Driver %s\n",
- drv->bus->name, dev->bus_id, drv->name);
+ pr_debug("bus: '%s': %s: matched device %s with driver %s\n",
+ drv->bus->name, __FUNCTION__, dev->bus_id, drv->name);
ret = really_probe(dev, drv);
@@ -201,27 +202,27 @@ done:
return ret;
}
-static int __device_attach(struct device_driver * drv, void * data)
+static int __device_attach(struct device_driver *drv, void *data)
{
- struct device * dev = data;
+ struct device *dev = data;
return driver_probe_device(drv, dev);
}
/**
- * device_attach - try to attach device to a driver.
- * @dev: device.
+ * device_attach - try to attach device to a driver.
+ * @dev: device.
*
- * Walk the list of drivers that the bus has and call
- * driver_probe_device() for each pair. If a compatible
- * pair is found, break out and return.
+ * Walk the list of drivers that the bus has and call
+ * driver_probe_device() for each pair. If a compatible
+ * pair is found, break out and return.
*
- * Returns 1 if the device was bound to a driver;
- * 0 if no matching device was found;
- * -ENODEV if the device is not registered.
+ * Returns 1 if the device was bound to a driver;
+ * 0 if no matching device was found;
+ * -ENODEV if the device is not registered.
*
- * When called for a USB interface, @dev->parent->sem must be held.
+ * When called for a USB interface, @dev->parent->sem must be held.
*/
-int device_attach(struct device * dev)
+int device_attach(struct device *dev)
{
int ret = 0;
@@ -240,10 +241,11 @@ int device_attach(struct device * dev)
up(&dev->sem);
return ret;
}
+EXPORT_SYMBOL_GPL(device_attach);
-static int __driver_attach(struct device * dev, void * data)
+static int __driver_attach(struct device *dev, void *data)
{
- struct device_driver * drv = data;
+ struct device_driver *drv = data;
/*
* Lock device and try to bind to it. We drop the error
@@ -268,35 +270,35 @@ static int __driver_attach(struct device * dev, void * data)
}
/**
- * driver_attach - try to bind driver to devices.
- * @drv: driver.
+ * driver_attach - try to bind driver to devices.
+ * @drv: driver.
*
- * Walk the list of devices that the bus has on it and try to
- * match the driver with each one. If driver_probe_device()
- * returns 0 and the @dev->driver is set, we've found a
- * compatible pair.
+ * Walk the list of devices that the bus has on it and try to
+ * match the driver with each one. If driver_probe_device()
+ * returns 0 and the @dev->driver is set, we've found a
+ * compatible pair.
*/
-int driver_attach(struct device_driver * drv)
+int driver_attach(struct device_driver *drv)
{
return bus_for_each_dev(drv->bus, NULL, drv, __driver_attach);
}
+EXPORT_SYMBOL_GPL(driver_attach);
/*
- * __device_release_driver() must be called with @dev->sem held.
- * When called for a USB interface, @dev->parent->sem must be held as well.
+ * __device_release_driver() must be called with @dev->sem held.
+ * When called for a USB interface, @dev->parent->sem must be held as well.
*/
-static void __device_release_driver(struct device * dev)
+static void __device_release_driver(struct device *dev)
{
- struct device_driver * drv;
+ struct device_driver *drv;
- drv = get_driver(dev->driver);
+ drv = dev->driver;
if (drv) {
driver_sysfs_remove(dev);
sysfs_remove_link(&dev->kobj, "driver");
- klist_remove(&dev->knode_driver);
if (dev->bus)
- blocking_notifier_call_chain(&dev->bus->bus_notifier,
+ blocking_notifier_call_chain(&dev->bus->p->bus_notifier,
BUS_NOTIFY_UNBIND_DRIVER,
dev);
@@ -306,18 +308,18 @@ static void __device_release_driver(struct device * dev)
drv->remove(dev);
devres_release_all(dev);
dev->driver = NULL;
- put_driver(drv);
+ klist_remove(&dev->knode_driver);
}
}
/**
- * device_release_driver - manually detach device from driver.
- * @dev: device.
+ * device_release_driver - manually detach device from driver.
+ * @dev: device.
*
- * Manually detach device from driver.
- * When called for a USB interface, @dev->parent->sem must be held.
+ * Manually detach device from driver.
+ * When called for a USB interface, @dev->parent->sem must be held.
*/
-void device_release_driver(struct device * dev)
+void device_release_driver(struct device *dev)
{
/*
* If anyone calls device_release_driver() recursively from
@@ -328,26 +330,26 @@ void device_release_driver(struct device * dev)
__device_release_driver(dev);
up(&dev->sem);
}
-
+EXPORT_SYMBOL_GPL(device_release_driver);
/**
* driver_detach - detach driver from all devices it controls.
* @drv: driver.
*/
-void driver_detach(struct device_driver * drv)
+void driver_detach(struct device_driver *drv)
{
- struct device * dev;
+ struct device *dev;
for (;;) {
- spin_lock(&drv->klist_devices.k_lock);
- if (list_empty(&drv->klist_devices.k_list)) {
- spin_unlock(&drv->klist_devices.k_lock);
+ spin_lock(&drv->p->klist_devices.k_lock);
+ if (list_empty(&drv->p->klist_devices.k_list)) {
+ spin_unlock(&drv->p->klist_devices.k_lock);
break;
}
- dev = list_entry(drv->klist_devices.k_list.prev,
+ dev = list_entry(drv->p->klist_devices.k_list.prev,
struct device, knode_driver.n_node);
get_device(dev);
- spin_unlock(&drv->klist_devices.k_lock);
+ spin_unlock(&drv->p->klist_devices.k_lock);
if (dev->parent) /* Needed for USB */
down(&dev->parent->sem);
@@ -360,9 +362,3 @@ void driver_detach(struct device_driver * drv)
put_device(dev);
}
}
-
-EXPORT_SYMBOL_GPL(device_bind_driver);
-EXPORT_SYMBOL_GPL(device_release_driver);
-EXPORT_SYMBOL_GPL(device_attach);
-EXPORT_SYMBOL_GPL(driver_attach);
-
diff --git a/drivers/base/driver.c b/drivers/base/driver.c
index eb11475293ed..a35f04121a00 100644
--- a/drivers/base/driver.c
+++ b/drivers/base/driver.c
@@ -3,6 +3,8 @@
*
* Copyright (c) 2002-3 Patrick Mochel
* Copyright (c) 2002-3 Open Source Development Labs
+ * Copyright (c) 2007 Greg Kroah-Hartman <gregkh@suse.de>
+ * Copyright (c) 2007 Novell Inc.
*
* This file is released under the GPLv2
*
@@ -15,46 +17,42 @@
#include "base.h"
#define to_dev(node) container_of(node, struct device, driver_list)
-#define to_drv(obj) container_of(obj, struct device_driver, kobj)
-static struct device * next_device(struct klist_iter * i)
+static struct device *next_device(struct klist_iter *i)
{
- struct klist_node * n = klist_next(i);
+ struct klist_node *n = klist_next(i);
return n ? container_of(n, struct device, knode_driver) : NULL;
}
/**
- * driver_for_each_device - Iterator for devices bound to a driver.
- * @drv: Driver we're iterating.
- * @start: Device to begin with
- * @data: Data to pass to the callback.
- * @fn: Function to call for each device.
+ * driver_for_each_device - Iterator for devices bound to a driver.
+ * @drv: Driver we're iterating.
+ * @start: Device to begin with
+ * @data: Data to pass to the callback.
+ * @fn: Function to call for each device.
*
- * Iterate over the @drv's list of devices calling @fn for each one.
+ * Iterate over the @drv's list of devices calling @fn for each one.
*/
-
-int driver_for_each_device(struct device_driver * drv, struct device * start,
- void * data, int (*fn)(struct device *, void *))
+int driver_for_each_device(struct device_driver *drv, struct device *start,
+ void *data, int (*fn)(struct device *, void *))
{
struct klist_iter i;
- struct device * dev;
+ struct device *dev;
int error = 0;
if (!drv)
return -EINVAL;
- klist_iter_init_node(&drv->klist_devices, &i,
+ klist_iter_init_node(&drv->p->klist_devices, &i,
start ? &start->knode_driver : NULL);
while ((dev = next_device(&i)) && !error)
error = fn(dev, data);
klist_iter_exit(&i);
return error;
}
-
EXPORT_SYMBOL_GPL(driver_for_each_device);
-
/**
* driver_find_device - device iterator for locating a particular device.
* @drv: The device's driver
@@ -70,9 +68,9 @@ EXPORT_SYMBOL_GPL(driver_for_each_device);
* if it does. If the callback returns non-zero, this function will
* return to the caller and not iterate over any more devices.
*/
-struct device * driver_find_device(struct device_driver *drv,
- struct device * start, void * data,
- int (*match)(struct device *, void *))
+struct device *driver_find_device(struct device_driver *drv,
+ struct device *start, void *data,
+ int (*match)(struct device *dev, void *data))
{
struct klist_iter i;
struct device *dev;
@@ -80,7 +78,7 @@ struct device * driver_find_device(struct device_driver *drv,
if (!drv)
return NULL;
- klist_iter_init_node(&drv->klist_devices, &i,
+ klist_iter_init_node(&drv->p->klist_devices, &i,
(start ? &start->knode_driver : NULL));
while ((dev = next_device(&i)))
if (match(dev, data) && get_device(dev))
@@ -91,111 +89,179 @@ struct device * driver_find_device(struct device_driver *drv,
EXPORT_SYMBOL_GPL(driver_find_device);
/**
- * driver_create_file - create sysfs file for driver.
- * @drv: driver.
- * @attr: driver attribute descriptor.
+ * driver_create_file - create sysfs file for driver.
+ * @drv: driver.
+ * @attr: driver attribute descriptor.
*/
-
-int driver_create_file(struct device_driver * drv, struct driver_attribute * attr)
+int driver_create_file(struct device_driver *drv,
+ struct driver_attribute *attr)
{
int error;
if (get_driver(drv)) {
- error = sysfs_create_file(&drv->kobj, &attr->attr);
+ error = sysfs_create_file(&drv->p->kobj, &attr->attr);
put_driver(drv);
} else
error = -EINVAL;
return error;
}
-
+EXPORT_SYMBOL_GPL(driver_create_file);
/**
- * driver_remove_file - remove sysfs file for driver.
- * @drv: driver.
- * @attr: driver attribute descriptor.
+ * driver_remove_file - remove sysfs file for driver.
+ * @drv: driver.
+ * @attr: driver attribute descriptor.
*/
-
-void driver_remove_file(struct device_driver * drv, struct driver_attribute * attr)
+void driver_remove_file(struct device_driver *drv,
+ struct driver_attribute *attr)
{
if (get_driver(drv)) {
- sysfs_remove_file(&drv->kobj, &attr->attr);
+ sysfs_remove_file(&drv->p->kobj, &attr->attr);
put_driver(drv);
}
}
-
+EXPORT_SYMBOL_GPL(driver_remove_file);
/**
- * get_driver - increment driver reference count.
- * @drv: driver.
+ * driver_add_kobj - add a kobject below the specified driver
+ *
+ * You really don't want to do this, this is only here due to one looney
+ * iseries driver, go poke those developers if you are annoyed about
+ * this...
*/
-struct device_driver * get_driver(struct device_driver * drv)
+int driver_add_kobj(struct device_driver *drv, struct kobject *kobj,
+ const char *fmt, ...)
{
- return drv ? to_drv(kobject_get(&drv->kobj)) : NULL;
+ va_list args;
+ char *name;
+
+ va_start(args, fmt);
+ name = kvasprintf(GFP_KERNEL, fmt, args);
+ va_end(args);
+
+ if (!name)
+ return -ENOMEM;
+
+ return kobject_add(kobj, &drv->p->kobj, "%s", name);
}
+EXPORT_SYMBOL_GPL(driver_add_kobj);
+
+/**
+ * get_driver - increment driver reference count.
+ * @drv: driver.
+ */
+struct device_driver *get_driver(struct device_driver *drv)
+{
+ if (drv) {
+ struct driver_private *priv;
+ struct kobject *kobj;
+ kobj = kobject_get(&drv->p->kobj);
+ priv = to_driver(kobj);
+ return priv->driver;
+ }
+ return NULL;
+}
+EXPORT_SYMBOL_GPL(get_driver);
/**
- * put_driver - decrement driver's refcount.
- * @drv: driver.
+ * put_driver - decrement driver's refcount.
+ * @drv: driver.
*/
-void put_driver(struct device_driver * drv)
+void put_driver(struct device_driver *drv)
+{
+ kobject_put(&drv->p->kobj);
+}
+EXPORT_SYMBOL_GPL(put_driver);
+
+static int driver_add_groups(struct device_driver *drv,
+ struct attribute_group **groups)
{
- kobject_put(&drv->kobj);
+ int error = 0;
+ int i;
+
+ if (groups) {
+ for (i = 0; groups[i]; i++) {
+ error = sysfs_create_group(&drv->p->kobj, groups[i]);
+ if (error) {
+ while (--i >= 0)
+ sysfs_remove_group(&drv->p->kobj,
+ groups[i]);
+ break;
+ }
+ }
+ }
+ return error;
+}
+
+static void driver_remove_groups(struct device_driver *drv,
+ struct attribute_group **groups)
+{
+ int i;
+
+ if (groups)
+ for (i = 0; groups[i]; i++)
+ sysfs_remove_group(&drv->p->kobj, groups[i]);
}
/**
- * driver_register - register driver with bus
- * @drv: driver to register
+ * driver_register - register driver with bus
+ * @drv: driver to register
*
- * We pass off most of the work to the bus_add_driver() call,
- * since most of the things we have to do deal with the bus
- * structures.
+ * We pass off most of the work to the bus_add_driver() call,
+ * since most of the things we have to do deal with the bus
+ * structures.
*/
-int driver_register(struct device_driver * drv)
+int driver_register(struct device_driver *drv)
{
+ int ret;
+
if ((drv->bus->probe && drv->probe) ||
(drv->bus->remove && drv->remove) ||
- (drv->bus->shutdown && drv->shutdown)) {
- printk(KERN_WARNING "Driver '%s' needs updating - please use bus_type methods\n", drv->name);
- }
- klist_init(&drv->klist_devices, NULL, NULL);
- return bus_add_driver(drv);
+ (drv->bus->shutdown && drv->shutdown))
+ printk(KERN_WARNING "Driver '%s' needs updating - please use "
+ "bus_type methods\n", drv->name);
+ ret = bus_add_driver(drv);
+ if (ret)
+ return ret;
+ ret = driver_add_groups(drv, drv->groups);
+ if (ret)
+ bus_remove_driver(drv);
+ return ret;
}
+EXPORT_SYMBOL_GPL(driver_register);
/**
- * driver_unregister - remove driver from system.
- * @drv: driver.
+ * driver_unregister - remove driver from system.
+ * @drv: driver.
*
- * Again, we pass off most of the work to the bus-level call.
+ * Again, we pass off most of the work to the bus-level call.
*/
-
-void driver_unregister(struct device_driver * drv)
+void driver_unregister(struct device_driver *drv)
{
+ driver_remove_groups(drv, drv->groups);
bus_remove_driver(drv);
}
+EXPORT_SYMBOL_GPL(driver_unregister);
/**
- * driver_find - locate driver on a bus by its name.
- * @name: name of the driver.
- * @bus: bus to scan for the driver.
+ * driver_find - locate driver on a bus by its name.
+ * @name: name of the driver.
+ * @bus: bus to scan for the driver.
*
- * Call kset_find_obj() to iterate over list of drivers on
- * a bus to find driver by name. Return driver if found.
+ * Call kset_find_obj() to iterate over list of drivers on
+ * a bus to find driver by name. Return driver if found.
*
- * Note that kset_find_obj increments driver's reference count.
+ * Note that kset_find_obj increments driver's reference count.
*/
struct device_driver *driver_find(const char *name, struct bus_type *bus)
{
- struct kobject *k = kset_find_obj(&bus->drivers, name);
- if (k)
- return to_drv(k);
+ struct kobject *k = kset_find_obj(bus->p->drivers_kset, name);
+ struct driver_private *priv;
+
+ if (k) {
+ priv = to_driver(k);
+ return priv->driver;
+ }
return NULL;
}
-
-EXPORT_SYMBOL_GPL(driver_register);
-EXPORT_SYMBOL_GPL(driver_unregister);
-EXPORT_SYMBOL_GPL(get_driver);
-EXPORT_SYMBOL_GPL(put_driver);
EXPORT_SYMBOL_GPL(driver_find);
-
-EXPORT_SYMBOL_GPL(driver_create_file);
-EXPORT_SYMBOL_GPL(driver_remove_file);
diff --git a/drivers/base/firmware.c b/drivers/base/firmware.c
index 90c862932169..113815556809 100644
--- a/drivers/base/firmware.c
+++ b/drivers/base/firmware.c
@@ -3,11 +3,11 @@
*
* Copyright (c) 2002-3 Patrick Mochel
* Copyright (c) 2002-3 Open Source Development Labs
+ * Copyright (c) 2007 Greg Kroah-Hartman <gregkh@suse.de>
+ * Copyright (c) 2007 Novell Inc.
*
* This file is released under the GPLv2
- *
*/
-
#include <linux/kobject.h>
#include <linux/module.h>
#include <linux/init.h>
@@ -15,23 +15,13 @@
#include "base.h"
-static decl_subsys(firmware, NULL, NULL);
-
-int firmware_register(struct kset *s)
-{
- kobj_set_kset_s(s, firmware_subsys);
- return subsystem_register(s);
-}
-
-void firmware_unregister(struct kset *s)
-{
- subsystem_unregister(s);
-}
+struct kobject *firmware_kobj;
+EXPORT_SYMBOL_GPL(firmware_kobj);
int __init firmware_init(void)
{
- return subsystem_register(&firmware_subsys);
+ firmware_kobj = kobject_create_and_add("firmware", NULL);
+ if (!firmware_kobj)
+ return -ENOMEM;
+ return 0;
}
-
-EXPORT_SYMBOL_GPL(firmware_register);
-EXPORT_SYMBOL_GPL(firmware_unregister);
diff --git a/drivers/base/hypervisor.c b/drivers/base/hypervisor.c
index 7080b413ddc9..6428cba3aadd 100644
--- a/drivers/base/hypervisor.c
+++ b/drivers/base/hypervisor.c
@@ -2,19 +2,23 @@
* hypervisor.c - /sys/hypervisor subsystem.
*
* Copyright (C) IBM Corp. 2006
+ * Copyright (C) 2007 Greg Kroah-Hartman <gregkh@suse.de>
+ * Copyright (C) 2007 Novell Inc.
*
* This file is released under the GPLv2
*/
#include <linux/kobject.h>
#include <linux/device.h>
-
#include "base.h"
-decl_subsys(hypervisor, NULL, NULL);
-EXPORT_SYMBOL_GPL(hypervisor_subsys);
+struct kobject *hypervisor_kobj;
+EXPORT_SYMBOL_GPL(hypervisor_kobj);
int __init hypervisor_init(void)
{
- return subsystem_register(&hypervisor_subsys);
+ hypervisor_kobj = kobject_create_and_add("hypervisor", NULL);
+ if (!hypervisor_kobj)
+ return -ENOMEM;
+ return 0;
}
diff --git a/drivers/base/init.c b/drivers/base/init.c
index 37138154f9e8..7bd9b6a5b01f 100644
--- a/drivers/base/init.c
+++ b/drivers/base/init.c
@@ -1,10 +1,8 @@
/*
- *
* Copyright (c) 2002-3 Patrick Mochel
* Copyright (c) 2002-3 Open Source Development Labs
*
* This file is released under the GPLv2
- *
*/
#include <linux/device.h>
@@ -14,12 +12,11 @@
#include "base.h"
/**
- * driver_init - initialize driver model.
+ * driver_init - initialize driver model.
*
- * Call the driver model init functions to initialize their
- * subsystems. Called early from init/main.c.
+ * Call the driver model init functions to initialize their
+ * subsystems. Called early from init/main.c.
*/
-
void __init driver_init(void)
{
/* These are the core pieces */
@@ -36,5 +33,4 @@ void __init driver_init(void)
system_bus_init();
cpu_dev_init();
memory_dev_init();
- attribute_container_init();
}
diff --git a/drivers/base/memory.c b/drivers/base/memory.c
index 7868707c7eda..7ae413fdd5fc 100644
--- a/drivers/base/memory.c
+++ b/drivers/base/memory.c
@@ -26,7 +26,7 @@
#define MEMORY_CLASS_NAME "memory"
static struct sysdev_class memory_sysdev_class = {
- set_kset_name(MEMORY_CLASS_NAME),
+ .name = MEMORY_CLASS_NAME,
};
static const char *memory_uevent_name(struct kset *kset, struct kobject *kobj)
diff --git a/drivers/base/module.c b/drivers/base/module.c
new file mode 100644
index 000000000000..103be9cacb05
--- /dev/null
+++ b/drivers/base/module.c
@@ -0,0 +1,94 @@
+/*
+ * module.c - module sysfs fun for drivers
+ *
+ * This file is released under the GPLv2
+ *
+ */
+#include <linux/device.h>
+#include <linux/module.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include "base.h"
+
+static char *make_driver_name(struct device_driver *drv)
+{
+ char *driver_name;
+
+ driver_name = kmalloc(strlen(drv->name) + strlen(drv->bus->name) + 2,
+ GFP_KERNEL);
+ if (!driver_name)
+ return NULL;
+
+ sprintf(driver_name, "%s:%s", drv->bus->name, drv->name);
+ return driver_name;
+}
+
+static void module_create_drivers_dir(struct module_kobject *mk)
+{
+ if (!mk || mk->drivers_dir)
+ return;
+
+ mk->drivers_dir = kobject_create_and_add("drivers", &mk->kobj);
+}
+
+void module_add_driver(struct module *mod, struct device_driver *drv)
+{
+ char *driver_name;
+ int no_warn;
+ struct module_kobject *mk = NULL;
+
+ if (!drv)
+ return;
+
+ if (mod)
+ mk = &mod->mkobj;
+ else if (drv->mod_name) {
+ struct kobject *mkobj;
+
+ /* Lookup built-in module entry in /sys/modules */
+ mkobj = kset_find_obj(module_kset, drv->mod_name);
+ if (mkobj) {
+ mk = container_of(mkobj, struct module_kobject, kobj);
+ /* remember our module structure */
+ drv->p->mkobj = mk;
+ /* kset_find_obj took a reference */
+ kobject_put(mkobj);
+ }
+ }
+
+ if (!mk)
+ return;
+
+ /* Don't check return codes; these calls are idempotent */
+ no_warn = sysfs_create_link(&drv->p->kobj, &mk->kobj, "module");
+ driver_name = make_driver_name(drv);
+ if (driver_name) {
+ module_create_drivers_dir(mk);
+ no_warn = sysfs_create_link(mk->drivers_dir, &drv->p->kobj,
+ driver_name);
+ kfree(driver_name);
+ }
+}
+
+void module_remove_driver(struct device_driver *drv)
+{
+ struct module_kobject *mk = NULL;
+ char *driver_name;
+
+ if (!drv)
+ return;
+
+ sysfs_remove_link(&drv->p->kobj, "module");
+
+ if (drv->owner)
+ mk = &drv->owner->mkobj;
+ else if (drv->p->mkobj)
+ mk = drv->p->mkobj;
+ if (mk && mk->drivers_dir) {
+ driver_name = make_driver_name(drv);
+ if (driver_name) {
+ sysfs_remove_link(mk->drivers_dir, driver_name);
+ kfree(driver_name);
+ }
+ }
+}
diff --git a/drivers/base/node.c b/drivers/base/node.c
index 88eeed72b5d6..e59861f18ce5 100644
--- a/drivers/base/node.c
+++ b/drivers/base/node.c
@@ -15,7 +15,7 @@
#include <linux/device.h>
static struct sysdev_class node_class = {
- set_kset_name("node"),
+ .name = "node",
};
diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index fb5609241482..efaf282c438c 100644
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c
@@ -20,7 +20,8 @@
#include "base.h"
-#define to_platform_driver(drv) (container_of((drv), struct platform_driver, driver))
+#define to_platform_driver(drv) (container_of((drv), struct platform_driver, \
+ driver))
struct device platform_bus = {
.bus_id = "platform",
@@ -28,14 +29,13 @@ struct device platform_bus = {
EXPORT_SYMBOL_GPL(platform_bus);
/**
- * platform_get_resource - get a resource for a device
- * @dev: platform device
- * @type: resource type
- * @num: resource index
+ * platform_get_resource - get a resource for a device
+ * @dev: platform device
+ * @type: resource type
+ * @num: resource index
*/
-struct resource *
-platform_get_resource(struct platform_device *dev, unsigned int type,
- unsigned int num)
+struct resource *platform_get_resource(struct platform_device *dev,
+ unsigned int type, unsigned int num)
{
int i;
@@ -43,8 +43,7 @@ platform_get_resource(struct platform_device *dev, unsigned int type,
struct resource *r = &dev->resource[i];
if ((r->flags & (IORESOURCE_IO|IORESOURCE_MEM|
- IORESOURCE_IRQ|IORESOURCE_DMA))
- == type)
+ IORESOURCE_IRQ|IORESOURCE_DMA)) == type)
if (num-- == 0)
return r;
}
@@ -53,9 +52,9 @@ platform_get_resource(struct platform_device *dev, unsigned int type,
EXPORT_SYMBOL_GPL(platform_get_resource);
/**
- * platform_get_irq - get an IRQ for a device
- * @dev: platform device
- * @num: IRQ number index
+ * platform_get_irq - get an IRQ for a device
+ * @dev: platform device
+ * @num: IRQ number index
*/
int platform_get_irq(struct platform_device *dev, unsigned int num)
{
@@ -66,14 +65,13 @@ int platform_get_irq(struct platform_device *dev, unsigned int num)
EXPORT_SYMBOL_GPL(platform_get_irq);
/**
- * platform_get_resource_byname - get a resource for a device by name
- * @dev: platform device
- * @type: resource type
- * @name: resource name
+ * platform_get_resource_byname - get a resource for a device by name
+ * @dev: platform device
+ * @type: resource type
+ * @name: resource name
*/
-struct resource *
-platform_get_resource_byname(struct platform_device *dev, unsigned int type,
- char *name)
+struct resource *platform_get_resource_byname(struct platform_device *dev,
+ unsigned int type, char *name)
{
int i;
@@ -90,22 +88,23 @@ platform_get_resource_byname(struct platform_device *dev, unsigned int type,
EXPORT_SYMBOL_GPL(platform_get_resource_byname);
/**
- * platform_get_irq - get an IRQ for a device
- * @dev: platform device
- * @name: IRQ name
+ * platform_get_irq - get an IRQ for a device
+ * @dev: platform device
+ * @name: IRQ name
*/
int platform_get_irq_byname(struct platform_device *dev, char *name)
{
- struct resource *r = platform_get_resource_byname(dev, IORESOURCE_IRQ, name);
+ struct resource *r = platform_get_resource_byname(dev, IORESOURCE_IRQ,
+ name);
return r ? r->start : -ENXIO;
}
EXPORT_SYMBOL_GPL(platform_get_irq_byname);
/**
- * platform_add_devices - add a numbers of platform devices
- * @devs: array of platform devices to add
- * @num: number of platform devices in array
+ * platform_add_devices - add a numbers of platform devices
+ * @devs: array of platform devices to add
+ * @num: number of platform devices in array
*/
int platform_add_devices(struct platform_device **devs, int num)
{
@@ -130,12 +129,11 @@ struct platform_object {
};
/**
- * platform_device_put
- * @pdev: platform device to free
+ * platform_device_put
+ * @pdev: platform device to free
*
- * Free all memory associated with a platform device. This function
- * must _only_ be externally called in error cases. All other usage
- * is a bug.
+ * Free all memory associated with a platform device. This function must
+ * _only_ be externally called in error cases. All other usage is a bug.
*/
void platform_device_put(struct platform_device *pdev)
{
@@ -146,7 +144,8 @@ EXPORT_SYMBOL_GPL(platform_device_put);
static void platform_device_release(struct device *dev)
{
- struct platform_object *pa = container_of(dev, struct platform_object, pdev.dev);
+ struct platform_object *pa = container_of(dev, struct platform_object,
+ pdev.dev);
kfree(pa->pdev.dev.platform_data);
kfree(pa->pdev.resource);
@@ -154,12 +153,12 @@ static void platform_device_release(struct device *dev)
}
/**
- * platform_device_alloc
- * @name: base name of the device we're adding
- * @id: instance id
+ * platform_device_alloc
+ * @name: base name of the device we're adding
+ * @id: instance id
*
- * Create a platform device object which can have other objects attached
- * to it, and which will have attached objects freed when it is released.
+ * Create a platform device object which can have other objects attached
+ * to it, and which will have attached objects freed when it is released.
*/
struct platform_device *platform_device_alloc(const char *name, int id)
{
@@ -179,16 +178,17 @@ struct platform_device *platform_device_alloc(const char *name, int id)
EXPORT_SYMBOL_GPL(platform_device_alloc);
/**
- * platform_device_add_resources
- * @pdev: platform device allocated by platform_device_alloc to add resources to
- * @res: set of resources that needs to be allocated for the device
- * @num: number of resources
+ * platform_device_add_resources
+ * @pdev: platform device allocated by platform_device_alloc to add resources to
+ * @res: set of resources that needs to be allocated for the device
+ * @num: number of resources
*
- * Add a copy of the resources to the platform device. The memory
- * associated with the resources will be freed when the platform
- * device is released.
+ * Add a copy of the resources to the platform device. The memory
+ * associated with the resources will be freed when the platform device is
+ * released.
*/
-int platform_device_add_resources(struct platform_device *pdev, struct resource *res, unsigned int num)
+int platform_device_add_resources(struct platform_device *pdev,
+ struct resource *res, unsigned int num)
{
struct resource *r;
@@ -203,16 +203,17 @@ int platform_device_add_resources(struct platform_device *pdev, struct resource
EXPORT_SYMBOL_GPL(platform_device_add_resources);
/**
- * platform_device_add_data
- * @pdev: platform device allocated by platform_device_alloc to add resources to
- * @data: platform specific data for this platform device
- * @size: size of platform specific data
+ * platform_device_add_data
+ * @pdev: platform device allocated by platform_device_alloc to add resources to
+ * @data: platform specific data for this platform device
+ * @size: size of platform specific data
*
- * Add a copy of platform specific data to the platform device's platform_data
- * pointer. The memory associated with the platform data will be freed
- * when the platform device is released.
+ * Add a copy of platform specific data to the platform device's
+ * platform_data pointer. The memory associated with the platform data
+ * will be freed when the platform device is released.
*/
-int platform_device_add_data(struct platform_device *pdev, const void *data, size_t size)
+int platform_device_add_data(struct platform_device *pdev, const void *data,
+ size_t size)
{
void *d;
@@ -226,11 +227,11 @@ int platform_device_add_data(struct platform_device *pdev, const void *data, siz
EXPORT_SYMBOL_GPL(platform_device_add_data);
/**
- * platform_device_add - add a platform device to device hierarchy
- * @pdev: platform device we're adding
+ * platform_device_add - add a platform device to device hierarchy
+ * @pdev: platform device we're adding
*
- * This is part 2 of platform_device_register(), though may be called
- * separately _iff_ pdev was allocated by platform_device_alloc().
+ * This is part 2 of platform_device_register(), though may be called
+ * separately _iff_ pdev was allocated by platform_device_alloc().
*/
int platform_device_add(struct platform_device *pdev)
{
@@ -289,13 +290,12 @@ int platform_device_add(struct platform_device *pdev)
EXPORT_SYMBOL_GPL(platform_device_add);
/**
- * platform_device_del - remove a platform-level device
- * @pdev: platform device we're removing
+ * platform_device_del - remove a platform-level device
+ * @pdev: platform device we're removing
*
- * Note that this function will also release all memory- and port-based
- * resources owned by the device (@dev->resource). This function
- * must _only_ be externally called in error cases. All other usage
- * is a bug.
+ * Note that this function will also release all memory- and port-based
+ * resources owned by the device (@dev->resource). This function must
+ * _only_ be externally called in error cases. All other usage is a bug.
*/
void platform_device_del(struct platform_device *pdev)
{
@@ -314,11 +314,10 @@ void platform_device_del(struct platform_device *pdev)
EXPORT_SYMBOL_GPL(platform_device_del);
/**
- * platform_device_register - add a platform-level device
- * @pdev: platform device we're adding
- *
+ * platform_device_register - add a platform-level device
+ * @pdev: platform device we're adding
*/
-int platform_device_register(struct platform_device * pdev)
+int platform_device_register(struct platform_device *pdev)
{
device_initialize(&pdev->dev);
return platform_device_add(pdev);
@@ -326,14 +325,14 @@ int platform_device_register(struct platform_device * pdev)
EXPORT_SYMBOL_GPL(platform_device_register);
/**
- * platform_device_unregister - unregister a platform-level device
- * @pdev: platform device we're unregistering
+ * platform_device_unregister - unregister a platform-level device
+ * @pdev: platform device we're unregistering
*
- * Unregistration is done in 2 steps. First we release all resources
- * and remove it from the subsystem, then we drop reference count by
- * calling platform_device_put().
+ * Unregistration is done in 2 steps. First we release all resources
+ * and remove it from the subsystem, then we drop reference count by
+ * calling platform_device_put().
*/
-void platform_device_unregister(struct platform_device * pdev)
+void platform_device_unregister(struct platform_device *pdev)
{
platform_device_del(pdev);
platform_device_put(pdev);
@@ -341,27 +340,29 @@ void platform_device_unregister(struct platform_device * pdev)
EXPORT_SYMBOL_GPL(platform_device_unregister);
/**
- * platform_device_register_simple
- * @name: base name of the device we're adding
- * @id: instance id
- * @res: set of resources that needs to be allocated for the device
- * @num: number of resources
+ * platform_device_register_simple
+ * @name: base name of the device we're adding
+ * @id: instance id
+ * @res: set of resources that needs to be allocated for the device
+ * @num: number of resources
*
- * This function creates a simple platform device that requires minimal
- * resource and memory management. Canned release function freeing
- * memory allocated for the device allows drivers using such devices
- * to be unloaded without waiting for the last reference to the device
- * to be dropped.
+ * This function creates a simple platform device that requires minimal
+ * resource and memory management. Canned release function freeing memory
+ * allocated for the device allows drivers using such devices to be
+ * unloaded without waiting for the last reference to the device to be
+ * dropped.
*
- * This interface is primarily intended for use with legacy drivers
- * which probe hardware directly. Because such drivers create sysfs
- * device nodes themselves, rather than letting system infrastructure
- * handle such device enumeration tasks, they don't fully conform to
- * the Linux driver model. In particular, when such drivers are built
- * as modules, they can't be "hotplugged".
+ * This interface is primarily intended for use with legacy drivers which
+ * probe hardware directly. Because such drivers create sysfs device nodes
+ * themselves, rather than letting system infrastructure handle such device
+ * enumeration tasks, they don't fully conform to the Linux driver model.
+ * In particular, when such drivers are built as modules, they can't be
+ * "hotplugged".
*/
-struct platform_device *platform_device_register_simple(char *name, int id,
- struct resource *res, unsigned int num)
+struct platform_device *platform_device_register_simple(const char *name,
+ int id,
+ struct resource *res,
+ unsigned int num)
{
struct platform_device *pdev;
int retval;
@@ -436,8 +437,8 @@ static int platform_drv_resume(struct device *_dev)
}
/**
- * platform_driver_register
- * @drv: platform driver structure
+ * platform_driver_register
+ * @drv: platform driver structure
*/
int platform_driver_register(struct platform_driver *drv)
{
@@ -457,8 +458,8 @@ int platform_driver_register(struct platform_driver *drv)
EXPORT_SYMBOL_GPL(platform_driver_register);
/**
- * platform_driver_unregister
- * @drv: platform driver structure
+ * platform_driver_unregister
+ * @drv: platform driver structure
*/
void platform_driver_unregister(struct platform_driver *drv)
{
@@ -497,12 +498,12 @@ int __init_or_module platform_driver_probe(struct platform_driver *drv,
* if the probe was successful, and make sure any forced probes of
* new devices fail.
*/
- spin_lock(&platform_bus_type.klist_drivers.k_lock);
+ spin_lock(&platform_bus_type.p->klist_drivers.k_lock);
drv->probe = NULL;
- if (code == 0 && list_empty(&drv->driver.klist_devices.k_list))
+ if (code == 0 && list_empty(&drv->driver.p->klist_devices.k_list))
retval = -ENODEV;
drv->driver.probe = platform_drv_probe_fail;
- spin_unlock(&platform_bus_type.klist_drivers.k_lock);
+ spin_unlock(&platform_bus_type.p->klist_drivers.k_lock);
if (code != retval)
platform_driver_unregister(drv);
@@ -516,8 +517,8 @@ EXPORT_SYMBOL_GPL(platform_driver_probe);
* (b) sysfs attribute lets new-style coldplug recover from hotplug events
* mishandled before system is fully running: "modprobe $(cat modalias)"
*/
-static ssize_t
-modalias_show(struct device *dev, struct device_attribute *a, char *buf)
+static ssize_t modalias_show(struct device *dev, struct device_attribute *a,
+ char *buf)
{
struct platform_device *pdev = to_platform_device(dev);
int len = snprintf(buf, PAGE_SIZE, "platform:%s\n", pdev->name);
@@ -538,26 +539,24 @@ static int platform_uevent(struct device *dev, struct kobj_uevent_env *env)
return 0;
}
-
/**
- * platform_match - bind platform device to platform driver.
- * @dev: device.
- * @drv: driver.
+ * platform_match - bind platform device to platform driver.
+ * @dev: device.
+ * @drv: driver.
*
- * Platform device IDs are assumed to be encoded like this:
- * "<name><instance>", where <name> is a short description of the
- * type of device, like "pci" or "floppy", and <instance> is the
- * enumerated instance of the device, like '0' or '42'.
- * Driver IDs are simply "<name>".
- * So, extract the <name> from the platform_device structure,
- * and compare it against the name of the driver. Return whether
- * they match or not.
+ * Platform device IDs are assumed to be encoded like this:
+ * "<name><instance>", where <name> is a short description of the type of
+ * device, like "pci" or "floppy", and <instance> is the enumerated
+ * instance of the device, like '0' or '42'. Driver IDs are simply
+ * "<name>". So, extract the <name> from the platform_device structure,
+ * and compare it against the name of the driver. Return whether they match
+ * or not.
*/
-
-static int platform_match(struct device * dev, struct device_driver * drv)
+static int platform_match(struct device *dev, struct device_driver *drv)
{
- struct platform_device *pdev = container_of(dev, struct platform_device, dev);
+ struct platform_device *pdev;
+ pdev = container_of(dev, struct platform_device, dev);
return (strncmp(pdev->name, drv->name, BUS_ID_SIZE) == 0);
}
@@ -574,9 +573,10 @@ static int platform_suspend(struct device *dev, pm_message_t mesg)
static int platform_suspend_late(struct device *dev, pm_message_t mesg)
{
struct platform_driver *drv = to_platform_driver(dev->driver);
- struct platform_device *pdev = container_of(dev, struct platform_device, dev);
+ struct platform_device *pdev;
int ret = 0;
+ pdev = container_of(dev, struct platform_device, dev);
if (dev->driver && drv->suspend_late)
ret = drv->suspend_late(pdev, mesg);
@@ -586,16 +586,17 @@ static int platform_suspend_late(struct device *dev, pm_message_t mesg)
static int platform_resume_early(struct device *dev)
{
struct platform_driver *drv = to_platform_driver(dev->driver);
- struct platform_device *pdev = container_of(dev, struct platform_device, dev);
+ struct platform_device *pdev;
int ret = 0;
+ pdev = container_of(dev, struct platform_device, dev);
if (dev->driver && drv->resume_early)
ret = drv->resume_early(pdev);
return ret;
}
-static int platform_resume(struct device * dev)
+static int platform_resume(struct device *dev)
{
int ret = 0;
diff --git a/drivers/base/power/Makefile b/drivers/base/power/Makefile
index 44504e6618fb..06a86fe6a78d 100644
--- a/drivers/base/power/Makefile
+++ b/drivers/base/power/Makefile
@@ -1,4 +1,3 @@
-obj-y := shutdown.o
obj-$(CONFIG_PM) += sysfs.o
obj-$(CONFIG_PM_SLEEP) += main.o
obj-$(CONFIG_PM_TRACE) += trace.o
diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c
index 691ffb64cc37..200ed5fafd50 100644
--- a/drivers/base/power/main.c
+++ b/drivers/base/power/main.c
@@ -24,20 +24,45 @@
#include <linux/mutex.h>
#include <linux/pm.h>
#include <linux/resume-trace.h>
+#include <linux/rwsem.h>
#include "../base.h"
#include "power.h"
+/*
+ * The entries in the dpm_active list are in a depth first order, simply
+ * because children are guaranteed to be discovered after parents, and
+ * are inserted at the back of the list on discovery.
+ *
+ * All the other lists are kept in the same order, for consistency.
+ * However the lists aren't always traversed in the same order.
+ * Semaphores must be acquired from the top (i.e., front) down
+ * and released in the opposite order. Devices must be suspended
+ * from the bottom (i.e., end) up and resumed in the opposite order.
+ * That way no parent will be suspended while it still has an active
+ * child.
+ *
+ * Since device_pm_add() may be called with a device semaphore held,
+ * we must never try to acquire a device semaphore while holding
+ * dpm_list_mutex.
+ */
+
LIST_HEAD(dpm_active);
+static LIST_HEAD(dpm_locked);
static LIST_HEAD(dpm_off);
static LIST_HEAD(dpm_off_irq);
+static LIST_HEAD(dpm_destroy);
-static DEFINE_MUTEX(dpm_mtx);
static DEFINE_MUTEX(dpm_list_mtx);
-int (*platform_enable_wakeup)(struct device *dev, int is_on);
+static DECLARE_RWSEM(pm_sleep_rwsem);
+int (*platform_enable_wakeup)(struct device *dev, int is_on);
+/**
+ * device_pm_add - add a device to the list of active devices
+ * @dev: Device to be added to the list
+ */
void device_pm_add(struct device *dev)
{
pr_debug("PM: Adding info for %s:%s\n",
@@ -48,8 +73,36 @@ void device_pm_add(struct device *dev)
mutex_unlock(&dpm_list_mtx);
}
+/**
+ * device_pm_remove - remove a device from the list of active devices
+ * @dev: Device to be removed from the list
+ *
+ * This function also removes the device's PM-related sysfs attributes.
+ */
void device_pm_remove(struct device *dev)
{
+ /*
+ * If this function is called during a suspend, it will be blocked,
+ * because we're holding the device's semaphore at that time, which may
+ * lead to a deadlock. In that case we want to print a warning.
+ * However, it may also be called by unregister_dropped_devices() with
+ * the device's semaphore released, in which case the warning should
+ * not be printed.
+ */
+ if (down_trylock(&dev->sem)) {
+ if (down_read_trylock(&pm_sleep_rwsem)) {
+ /* No suspend in progress, wait on dev->sem */
+ down(&dev->sem);
+ up_read(&pm_sleep_rwsem);
+ } else {
+ /* Suspend in progress, we may deadlock */
+ dev_warn(dev, "Suspicious %s during suspend\n",
+ __FUNCTION__);
+ dump_stack();
+ /* The user has been warned ... */
+ down(&dev->sem);
+ }
+ }
pr_debug("PM: Removing info for %s:%s\n",
dev->bus ? dev->bus->name : "No Bus",
kobject_name(&dev->kobj));
@@ -57,25 +110,124 @@ void device_pm_remove(struct device *dev)
dpm_sysfs_remove(dev);
list_del_init(&dev->power.entry);
mutex_unlock(&dpm_list_mtx);
+ up(&dev->sem);
+}
+
+/**
+ * device_pm_schedule_removal - schedule the removal of a suspended device
+ * @dev: Device to destroy
+ *
+ * Moves the device to the dpm_destroy list for further processing by
+ * unregister_dropped_devices().
+ */
+void device_pm_schedule_removal(struct device *dev)
+{
+ pr_debug("PM: Preparing for removal: %s:%s\n",
+ dev->bus ? dev->bus->name : "No Bus",
+ kobject_name(&dev->kobj));
+ mutex_lock(&dpm_list_mtx);
+ list_move_tail(&dev->power.entry, &dpm_destroy);
+ mutex_unlock(&dpm_list_mtx);
+}
+
+/**
+ * pm_sleep_lock - mutual exclusion for registration and suspend
+ *
+ * Returns 0 if no suspend is underway and device registration
+ * may proceed, otherwise -EBUSY.
+ */
+int pm_sleep_lock(void)
+{
+ if (down_read_trylock(&pm_sleep_rwsem))
+ return 0;
+
+ return -EBUSY;
+}
+
+/**
+ * pm_sleep_unlock - mutual exclusion for registration and suspend
+ *
+ * This routine undoes the effect of device_pm_add_lock
+ * when a device's registration is complete.
+ */
+void pm_sleep_unlock(void)
+{
+ up_read(&pm_sleep_rwsem);
}
/*------------------------- Resume routines -------------------------*/
/**
- * resume_device - Restore state for one device.
+ * resume_device_early - Power on one device (early resume).
* @dev: Device.
*
+ * Must be called with interrupts disabled.
*/
-
-static int resume_device(struct device * dev)
+static int resume_device_early(struct device *dev)
{
int error = 0;
TRACE_DEVICE(dev);
TRACE_RESUME(0);
- down(&dev->sem);
+ if (dev->bus && dev->bus->resume_early) {
+ dev_dbg(dev, "EARLY resume\n");
+ error = dev->bus->resume_early(dev);
+ }
+
+ TRACE_RESUME(error);
+ return error;
+}
+
+/**
+ * dpm_power_up - Power on all regular (non-sysdev) devices.
+ *
+ * Walk the dpm_off_irq list and power each device up. This
+ * is used for devices that required they be powered down with
+ * interrupts disabled. As devices are powered on, they are moved
+ * to the dpm_off list.
+ *
+ * Must be called with interrupts disabled and only one CPU running.
+ */
+static void dpm_power_up(void)
+{
+
+ while (!list_empty(&dpm_off_irq)) {
+ struct list_head *entry = dpm_off_irq.next;
+ struct device *dev = to_device(entry);
+
+ list_move_tail(entry, &dpm_off);
+ resume_device_early(dev);
+ }
+}
+
+/**
+ * device_power_up - Turn on all devices that need special attention.
+ *
+ * Power on system devices, then devices that required we shut them down
+ * with interrupts disabled.
+ *
+ * Must be called with interrupts disabled.
+ */
+void device_power_up(void)
+{
+ sysdev_resume();
+ dpm_power_up();
+}
+EXPORT_SYMBOL_GPL(device_power_up);
+
+/**
+ * resume_device - Restore state for one device.
+ * @dev: Device.
+ *
+ */
+static int resume_device(struct device *dev)
+{
+ int error = 0;
+
+ TRACE_DEVICE(dev);
+ TRACE_RESUME(0);
if (dev->bus && dev->bus->resume) {
dev_dbg(dev,"resuming\n");
@@ -92,126 +244,94 @@ static int resume_device(struct device * dev)
error = dev->class->resume(dev);
}
- up(&dev->sem);
-
TRACE_RESUME(error);
return error;
}
-
-static int resume_device_early(struct device * dev)
-{
- int error = 0;
-
- TRACE_DEVICE(dev);
- TRACE_RESUME(0);
- if (dev->bus && dev->bus->resume_early) {
- dev_dbg(dev,"EARLY resume\n");
- error = dev->bus->resume_early(dev);
- }
- TRACE_RESUME(error);
- return error;
-}
-
-/*
- * Resume the devices that have either not gone through
- * the late suspend, or that did go through it but also
- * went through the early resume
+/**
+ * dpm_resume - Resume every device.
+ *
+ * Resume the devices that have either not gone through
+ * the late suspend, or that did go through it but also
+ * went through the early resume.
+ *
+ * Take devices from the dpm_off_list, resume them,
+ * and put them on the dpm_locked list.
*/
static void dpm_resume(void)
{
mutex_lock(&dpm_list_mtx);
while(!list_empty(&dpm_off)) {
- struct list_head * entry = dpm_off.next;
- struct device * dev = to_device(entry);
-
- get_device(dev);
- list_move_tail(entry, &dpm_active);
+ struct list_head *entry = dpm_off.next;
+ struct device *dev = to_device(entry);
+ list_move_tail(entry, &dpm_locked);
mutex_unlock(&dpm_list_mtx);
resume_device(dev);
mutex_lock(&dpm_list_mtx);
- put_device(dev);
}
mutex_unlock(&dpm_list_mtx);
}
-
/**
- * device_resume - Restore state of each device in system.
+ * unlock_all_devices - Release each device's semaphore
*
- * Walk the dpm_off list, remove each entry, resume the device,
- * then add it to the dpm_active list.
+ * Go through the dpm_off list. Put each device on the dpm_active
+ * list and unlock it.
*/
-
-void device_resume(void)
+static void unlock_all_devices(void)
{
- might_sleep();
- mutex_lock(&dpm_mtx);
- dpm_resume();
- mutex_unlock(&dpm_mtx);
-}
-
-EXPORT_SYMBOL_GPL(device_resume);
+ mutex_lock(&dpm_list_mtx);
+ while (!list_empty(&dpm_locked)) {
+ struct list_head *entry = dpm_locked.prev;
+ struct device *dev = to_device(entry);
+ list_move(entry, &dpm_active);
+ up(&dev->sem);
+ }
+ mutex_unlock(&dpm_list_mtx);
+}
/**
- * dpm_power_up - Power on some devices.
- *
- * Walk the dpm_off_irq list and power each device up. This
- * is used for devices that required they be powered down with
- * interrupts disabled. As devices are powered on, they are moved
- * to the dpm_active list.
+ * unregister_dropped_devices - Unregister devices scheduled for removal
*
- * Interrupts must be disabled when calling this.
+ * Unregister all devices on the dpm_destroy list.
*/
-
-static void dpm_power_up(void)
+static void unregister_dropped_devices(void)
{
- while(!list_empty(&dpm_off_irq)) {
- struct list_head * entry = dpm_off_irq.next;
- struct device * dev = to_device(entry);
+ mutex_lock(&dpm_list_mtx);
+ while (!list_empty(&dpm_destroy)) {
+ struct list_head *entry = dpm_destroy.next;
+ struct device *dev = to_device(entry);
- list_move_tail(entry, &dpm_off);
- resume_device_early(dev);
+ up(&dev->sem);
+ mutex_unlock(&dpm_list_mtx);
+ /* This also removes the device from the list */
+ device_unregister(dev);
+ mutex_lock(&dpm_list_mtx);
}
+ mutex_unlock(&dpm_list_mtx);
}
-
/**
- * device_power_up - Turn on all devices that need special attention.
+ * device_resume - Restore state of each device in system.
*
- * Power on system devices then devices that required we shut them down
- * with interrupts disabled.
- * Called with interrupts disabled.
+ * Resume all the devices, unlock them all, and allow new
+ * devices to be registered once again.
*/
-
-void device_power_up(void)
+void device_resume(void)
{
- sysdev_resume();
- dpm_power_up();
+ might_sleep();
+ dpm_resume();
+ unlock_all_devices();
+ unregister_dropped_devices();
+ up_write(&pm_sleep_rwsem);
}
-
-EXPORT_SYMBOL_GPL(device_power_up);
+EXPORT_SYMBOL_GPL(device_resume);
/*------------------------- Suspend routines -------------------------*/
-/*
- * The entries in the dpm_active list are in a depth first order, simply
- * because children are guaranteed to be discovered after parents, and
- * are inserted at the back of the list on discovery.
- *
- * All list on the suspend path are done in reverse order, so we operate
- * on the leaves of the device tree (or forests, depending on how you want
- * to look at it ;) first. As nodes are removed from the back of the list,
- * they are inserted into the front of their destintation lists.
- *
- * Things are the reverse on the resume path - iterations are done in
- * forward order, and nodes are inserted at the back of their destination
- * lists. This way, the ancestors will be accessed before their descendents.
- */
-
static inline char *suspend_verb(u32 event)
{
switch (event) {
@@ -222,7 +342,6 @@ static inline char *suspend_verb(u32 event)
}
}
-
static void
suspend_device_dbg(struct device *dev, pm_message_t state, char *info)
{
@@ -232,16 +351,73 @@ suspend_device_dbg(struct device *dev, pm_message_t state, char *info)
}
/**
- * suspend_device - Save state of one device.
+ * suspend_device_late - Shut down one device (late suspend).
* @dev: Device.
* @state: Power state device is entering.
+ *
+ * This is called with interrupts off and only a single CPU running.
*/
+static int suspend_device_late(struct device *dev, pm_message_t state)
+{
+ int error = 0;
-static int suspend_device(struct device * dev, pm_message_t state)
+ if (dev->bus && dev->bus->suspend_late) {
+ suspend_device_dbg(dev, state, "LATE ");
+ error = dev->bus->suspend_late(dev, state);
+ suspend_report_result(dev->bus->suspend_late, error);
+ }
+ return error;
+}
+
+/**
+ * device_power_down - Shut down special devices.
+ * @state: Power state to enter.
+ *
+ * Power down devices that require interrupts to be disabled
+ * and move them from the dpm_off list to the dpm_off_irq list.
+ * Then power down system devices.
+ *
+ * Must be called with interrupts disabled and only one CPU running.
+ */
+int device_power_down(pm_message_t state)
+{
+ int error = 0;
+
+ while (!list_empty(&dpm_off)) {
+ struct list_head *entry = dpm_off.prev;
+ struct device *dev = to_device(entry);
+
+ list_del_init(&dev->power.entry);
+ error = suspend_device_late(dev, state);
+ if (error) {
+ printk(KERN_ERR "Could not power down device %s: "
+ "error %d\n",
+ kobject_name(&dev->kobj), error);
+ if (list_empty(&dev->power.entry))
+ list_add(&dev->power.entry, &dpm_off);
+ break;
+ }
+ if (list_empty(&dev->power.entry))
+ list_add(&dev->power.entry, &dpm_off_irq);
+ }
+
+ if (!error)
+ error = sysdev_suspend(state);
+ if (error)
+ dpm_power_up();
+ return error;
+}
+EXPORT_SYMBOL_GPL(device_power_down);
+
+/**
+ * suspend_device - Save state of one device.
+ * @dev: Device.
+ * @state: Power state device is entering.
+ */
+int suspend_device(struct device *dev, pm_message_t state)
{
int error = 0;
- down(&dev->sem);
if (dev->power.power_state.event) {
dev_dbg(dev, "PM: suspend %d-->%d\n",
dev->power.power_state.event, state.event);
@@ -264,123 +440,105 @@ static int suspend_device(struct device * dev, pm_message_t state)
error = dev->bus->suspend(dev, state);
suspend_report_result(dev->bus->suspend, error);
}
- up(&dev->sem);
- return error;
-}
-
-
-/*
- * This is called with interrupts off, only a single CPU
- * running. We can't acquire a mutex or semaphore (and we don't
- * need the protection)
- */
-static int suspend_device_late(struct device *dev, pm_message_t state)
-{
- int error = 0;
-
- if (dev->bus && dev->bus->suspend_late) {
- suspend_device_dbg(dev, state, "LATE ");
- error = dev->bus->suspend_late(dev, state);
- suspend_report_result(dev->bus->suspend_late, error);
- }
return error;
}
/**
- * device_suspend - Save state and stop all devices in system.
- * @state: Power state to put each device in.
+ * dpm_suspend - Suspend every device.
+ * @state: Power state to put each device in.
*
- * Walk the dpm_active list, call ->suspend() for each device, and move
- * it to the dpm_off list.
+ * Walk the dpm_locked list. Suspend each device and move it
+ * to the dpm_off list.
*
* (For historical reasons, if it returns -EAGAIN, that used to mean
* that the device would be called again with interrupts disabled.
* These days, we use the "suspend_late()" callback for that, so we
* print a warning and consider it an error).
- *
- * If we get a different error, try and back out.
- *
- * If we hit a failure with any of the devices, call device_resume()
- * above to bring the suspended devices back to life.
- *
*/
-
-int device_suspend(pm_message_t state)
+static int dpm_suspend(pm_message_t state)
{
int error = 0;
- might_sleep();
- mutex_lock(&dpm_mtx);
mutex_lock(&dpm_list_mtx);
- while (!list_empty(&dpm_active) && error == 0) {
- struct list_head * entry = dpm_active.prev;
- struct device * dev = to_device(entry);
+ while (!list_empty(&dpm_locked)) {
+ struct list_head *entry = dpm_locked.prev;
+ struct device *dev = to_device(entry);
- get_device(dev);
+ list_del_init(&dev->power.entry);
mutex_unlock(&dpm_list_mtx);
-
error = suspend_device(dev, state);
-
- mutex_lock(&dpm_list_mtx);
-
- /* Check if the device got removed */
- if (!list_empty(&dev->power.entry)) {
- /* Move it to the dpm_off list */
- if (!error)
- list_move(&dev->power.entry, &dpm_off);
- }
- if (error)
+ if (error) {
printk(KERN_ERR "Could not suspend device %s: "
- "error %d%s\n",
- kobject_name(&dev->kobj), error,
- error == -EAGAIN ? " (please convert to suspend_late)" : "");
- put_device(dev);
+ "error %d%s\n",
+ kobject_name(&dev->kobj),
+ error,
+ (error == -EAGAIN ?
+ " (please convert to suspend_late)" :
+ ""));
+ mutex_lock(&dpm_list_mtx);
+ if (list_empty(&dev->power.entry))
+ list_add(&dev->power.entry, &dpm_locked);
+ mutex_unlock(&dpm_list_mtx);
+ break;
+ }
+ mutex_lock(&dpm_list_mtx);
+ if (list_empty(&dev->power.entry))
+ list_add(&dev->power.entry, &dpm_off);
}
mutex_unlock(&dpm_list_mtx);
- if (error)
- dpm_resume();
- mutex_unlock(&dpm_mtx);
return error;
}
-EXPORT_SYMBOL_GPL(device_suspend);
-
/**
- * device_power_down - Shut down special devices.
- * @state: Power state to enter.
+ * lock_all_devices - Acquire every device's semaphore
*
- * Walk the dpm_off_irq list, calling ->power_down() for each device that
- * couldn't power down the device with interrupts enabled. When we're
- * done, power down system devices.
+ * Go through the dpm_active list. Carefully lock each device's
+ * semaphore and put it in on the dpm_locked list.
*/
-
-int device_power_down(pm_message_t state)
+static void lock_all_devices(void)
{
- int error = 0;
- struct device * dev;
+ mutex_lock(&dpm_list_mtx);
+ while (!list_empty(&dpm_active)) {
+ struct list_head *entry = dpm_active.next;
+ struct device *dev = to_device(entry);
- while (!list_empty(&dpm_off)) {
- struct list_head * entry = dpm_off.prev;
+ /* Required locking order is dev->sem first,
+ * then dpm_list_mutex. Hence this awkward code.
+ */
+ get_device(dev);
+ mutex_unlock(&dpm_list_mtx);
+ down(&dev->sem);
+ mutex_lock(&dpm_list_mtx);
- dev = to_device(entry);
- error = suspend_device_late(dev, state);
- if (error)
- goto Error;
- list_move(&dev->power.entry, &dpm_off_irq);
+ if (list_empty(entry))
+ up(&dev->sem); /* Device was removed */
+ else
+ list_move_tail(entry, &dpm_locked);
+ put_device(dev);
}
+ mutex_unlock(&dpm_list_mtx);
+}
+
+/**
+ * device_suspend - Save state and stop all devices in system.
+ *
+ * Prevent new devices from being registered, then lock all devices
+ * and suspend them.
+ */
+int device_suspend(pm_message_t state)
+{
+ int error;
- error = sysdev_suspend(state);
- Done:
+ might_sleep();
+ down_write(&pm_sleep_rwsem);
+ lock_all_devices();
+ error = dpm_suspend(state);
+ if (error)
+ device_resume();
return error;
- Error:
- printk(KERN_ERR "Could not power down device %s: "
- "error %d\n", kobject_name(&dev->kobj), error);
- dpm_power_up();
- goto Done;
}
-
-EXPORT_SYMBOL_GPL(device_power_down);
+EXPORT_SYMBOL_GPL(device_suspend);
void __suspend_report_result(const char *function, void *fn, int ret)
{
diff --git a/drivers/base/power/power.h b/drivers/base/power/power.h
index 379da4e958e0..6f0dfca8ebdd 100644
--- a/drivers/base/power/power.h
+++ b/drivers/base/power/power.h
@@ -1,10 +1,3 @@
-/*
- * shutdown.c
- */
-
-extern void device_shutdown(void);
-
-
#ifdef CONFIG_PM_SLEEP
/*
@@ -20,6 +13,9 @@ static inline struct device *to_device(struct list_head *entry)
extern void device_pm_add(struct device *);
extern void device_pm_remove(struct device *);
+extern void device_pm_schedule_removal(struct device *);
+extern int pm_sleep_lock(void);
+extern void pm_sleep_unlock(void);
#else /* CONFIG_PM_SLEEP */
@@ -32,6 +28,15 @@ static inline void device_pm_remove(struct device *dev)
{
}
+static inline int pm_sleep_lock(void)
+{
+ return 0;
+}
+
+static inline void pm_sleep_unlock(void)
+{
+}
+
#endif
#ifdef CONFIG_PM
diff --git a/drivers/base/power/shutdown.c b/drivers/base/power/shutdown.c
deleted file mode 100644
index 56e8eaaac012..000000000000
--- a/drivers/base/power/shutdown.c
+++ /dev/null
@@ -1,48 +0,0 @@
-/*
- * shutdown.c - power management functions for the device tree.
- *
- * Copyright (c) 2002-3 Patrick Mochel
- * 2002-3 Open Source Development Lab
- *
- * This file is released under the GPLv2
- *
- */
-
-#include <linux/device.h>
-#include <asm/semaphore.h>
-
-#include "../base.h"
-#include "power.h"
-
-#define to_dev(node) container_of(node, struct device, kobj.entry)
-
-
-/**
- * We handle system devices differently - we suspend and shut them
- * down last and resume them first. That way, we don't do anything stupid like
- * shutting down the interrupt controller before any devices..
- *
- * Note that there are not different stages for power management calls -
- * they only get one called once when interrupts are disabled.
- */
-
-
-/**
- * device_shutdown - call ->shutdown() on each device to shutdown.
- */
-void device_shutdown(void)
-{
- struct device * dev, *devn;
-
- list_for_each_entry_safe_reverse(dev, devn, &devices_subsys.list,
- kobj.entry) {
- if (dev->bus && dev->bus->shutdown) {
- dev_dbg(dev, "shutdown\n");
- dev->bus->shutdown(dev);
- } else if (dev->driver && dev->driver->shutdown) {
- dev_dbg(dev, "shutdown\n");
- dev->driver->shutdown(dev);
- }
- }
-}
-
diff --git a/drivers/base/sys.c b/drivers/base/sys.c
index ac7ff6d0c6e5..2f79c55acdcc 100644
--- a/drivers/base/sys.c
+++ b/drivers/base/sys.c
@@ -25,8 +25,6 @@
#include "base.h"
-extern struct kset devices_subsys;
-
#define to_sysdev(k) container_of(k, struct sys_device, kobj)
#define to_sysdev_attr(a) container_of(a, struct sysdev_attribute, attr)
@@ -128,18 +126,17 @@ void sysdev_class_remove_file(struct sysdev_class *c,
}
EXPORT_SYMBOL_GPL(sysdev_class_remove_file);
-/*
- * declare system_subsys
- */
-static decl_subsys(system, &ktype_sysdev_class, NULL);
+static struct kset *system_kset;
int sysdev_class_register(struct sysdev_class * cls)
{
pr_debug("Registering sysdev class '%s'\n",
kobject_name(&cls->kset.kobj));
INIT_LIST_HEAD(&cls->drivers);
- cls->kset.kobj.parent = &system_subsys.kobj;
- cls->kset.kobj.kset = &system_subsys;
+ cls->kset.kobj.parent = &system_kset->kobj;
+ cls->kset.kobj.ktype = &ktype_sysdev_class;
+ cls->kset.kobj.kset = system_kset;
+ kobject_set_name(&cls->kset.kobj, cls->name);
return kset_register(&cls->kset);
}
@@ -228,20 +225,15 @@ int sysdev_register(struct sys_device * sysdev)
if (!cls)
return -EINVAL;
+ pr_debug("Registering sys device '%s'\n", kobject_name(&sysdev->kobj));
+
/* Make sure the kset is set */
sysdev->kobj.kset = &cls->kset;
- /* But make sure we point to the right type for sysfs translation */
- sysdev->kobj.ktype = &ktype_sysdev;
- error = kobject_set_name(&sysdev->kobj, "%s%d",
- kobject_name(&cls->kset.kobj), sysdev->id);
- if (error)
- return error;
-
- pr_debug("Registering sys device '%s'\n", kobject_name(&sysdev->kobj));
-
/* Register the object */
- error = kobject_register(&sysdev->kobj);
+ error = kobject_init_and_add(&sysdev->kobj, &ktype_sysdev, NULL,
+ "%s%d", kobject_name(&cls->kset.kobj),
+ sysdev->id);
if (!error) {
struct sysdev_driver * drv;
@@ -258,6 +250,7 @@ int sysdev_register(struct sys_device * sysdev)
}
mutex_unlock(&sysdev_drivers_lock);
}
+ kobject_uevent(&sysdev->kobj, KOBJ_ADD);
return error;
}
@@ -272,7 +265,7 @@ void sysdev_unregister(struct sys_device * sysdev)
}
mutex_unlock(&sysdev_drivers_lock);
- kobject_unregister(&sysdev->kobj);
+ kobject_put(&sysdev->kobj);
}
@@ -298,8 +291,7 @@ void sysdev_shutdown(void)
pr_debug("Shutting Down System Devices\n");
mutex_lock(&sysdev_drivers_lock);
- list_for_each_entry_reverse(cls, &system_subsys.list,
- kset.kobj.entry) {
+ list_for_each_entry_reverse(cls, &system_kset->list, kset.kobj.entry) {
struct sys_device * sysdev;
pr_debug("Shutting down type '%s':\n",
@@ -361,9 +353,7 @@ int sysdev_suspend(pm_message_t state)
pr_debug("Suspending System Devices\n");
- list_for_each_entry_reverse(cls, &system_subsys.list,
- kset.kobj.entry) {
-
+ list_for_each_entry_reverse(cls, &system_kset->list, kset.kobj.entry) {
pr_debug("Suspending type '%s':\n",
kobject_name(&cls->kset.kobj));
@@ -414,8 +404,7 @@ aux_driver:
}
/* resume other classes */
- list_for_each_entry_continue(cls, &system_subsys.list,
- kset.kobj.entry) {
+ list_for_each_entry_continue(cls, &system_kset->list, kset.kobj.entry) {
list_for_each_entry(err_dev, &cls->kset.list, kobj.entry) {
pr_debug(" %s\n", kobject_name(&err_dev->kobj));
__sysdev_resume(err_dev);
@@ -440,7 +429,7 @@ int sysdev_resume(void)
pr_debug("Resuming System Devices\n");
- list_for_each_entry(cls, &system_subsys.list, kset.kobj.entry) {
+ list_for_each_entry(cls, &system_kset->list, kset.kobj.entry) {
struct sys_device * sysdev;
pr_debug("Resuming type '%s':\n",
@@ -458,8 +447,10 @@ int sysdev_resume(void)
int __init system_bus_init(void)
{
- system_subsys.kobj.parent = &devices_subsys.kobj;
- return subsystem_register(&system_subsys);
+ system_kset = kset_create_and_add("system", NULL, &devices_kset->kobj);
+ if (!system_kset)
+ return -ENOMEM;
+ return 0;
}
EXPORT_SYMBOL_GPL(sysdev_register);