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Diffstat (limited to 'drivers/base')
-rw-r--r--drivers/base/firmware_class.c4
-rw-r--r--drivers/base/power/generic_ops.c66
-rw-r--r--drivers/base/power/main.c147
3 files changed, 55 insertions, 162 deletions
diff --git a/drivers/base/firmware_class.c b/drivers/base/firmware_class.c
index 06ed6b4e7df5..d5585da14c8a 100644
--- a/drivers/base/firmware_class.c
+++ b/drivers/base/firmware_class.c
@@ -534,6 +534,8 @@ static int _request_firmware(const struct firmware **firmware_p,
return 0;
}
+ read_lock_usermodehelper();
+
if (WARN_ON(usermodehelper_is_disabled())) {
dev_err(device, "firmware: %s will not be loaded\n", name);
retval = -EBUSY;
@@ -572,6 +574,8 @@ static int _request_firmware(const struct firmware **firmware_p,
fw_destroy_instance(fw_priv);
out:
+ read_unlock_usermodehelper();
+
if (retval) {
release_firmware(firmware);
*firmware_p = NULL;
diff --git a/drivers/base/power/generic_ops.c b/drivers/base/power/generic_ops.c
index 265a0ee3b49e..5a5b154bc1e9 100644
--- a/drivers/base/power/generic_ops.c
+++ b/drivers/base/power/generic_ops.c
@@ -97,16 +97,16 @@ int pm_generic_prepare(struct device *dev)
* @event: PM transition of the system under way.
* @bool: Whether or not this is the "noirq" stage.
*
- * If the device has not been suspended at run time, execute the
- * suspend/freeze/poweroff/thaw callback provided by its driver, if defined, and
- * return its error code. Otherwise, return zero.
+ * Execute the PM callback corresponding to @event provided by the driver of
+ * @dev, if defined, and return its error code. Return 0 if the callback is
+ * not present.
*/
static int __pm_generic_call(struct device *dev, int event, bool noirq)
{
const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
int (*callback)(struct device *);
- if (!pm || pm_runtime_suspended(dev))
+ if (!pm)
return 0;
switch (event) {
@@ -119,9 +119,15 @@ static int __pm_generic_call(struct device *dev, int event, bool noirq)
case PM_EVENT_HIBERNATE:
callback = noirq ? pm->poweroff_noirq : pm->poweroff;
break;
+ case PM_EVENT_RESUME:
+ callback = noirq ? pm->resume_noirq : pm->resume;
+ break;
case PM_EVENT_THAW:
callback = noirq ? pm->thaw_noirq : pm->thaw;
break;
+ case PM_EVENT_RESTORE:
+ callback = noirq ? pm->restore_noirq : pm->restore;
+ break;
default:
callback = NULL;
break;
@@ -211,56 +217,12 @@ int pm_generic_thaw(struct device *dev)
EXPORT_SYMBOL_GPL(pm_generic_thaw);
/**
- * __pm_generic_resume - Generic resume/restore callback for subsystems.
- * @dev: Device to handle.
- * @event: PM transition of the system under way.
- * @bool: Whether or not this is the "noirq" stage.
- *
- * Execute the resume/resotre callback provided by the @dev's driver, if
- * defined. If it returns 0, change the device's runtime PM status to 'active'.
- * Return the callback's error code.
- */
-static int __pm_generic_resume(struct device *dev, int event, bool noirq)
-{
- const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
- int (*callback)(struct device *);
- int ret;
-
- if (!pm)
- return 0;
-
- switch (event) {
- case PM_EVENT_RESUME:
- callback = noirq ? pm->resume_noirq : pm->resume;
- break;
- case PM_EVENT_RESTORE:
- callback = noirq ? pm->restore_noirq : pm->restore;
- break;
- default:
- callback = NULL;
- break;
- }
-
- if (!callback)
- return 0;
-
- ret = callback(dev);
- if (!ret && !noirq && pm_runtime_enabled(dev)) {
- pm_runtime_disable(dev);
- pm_runtime_set_active(dev);
- pm_runtime_enable(dev);
- }
-
- return ret;
-}
-
-/**
* pm_generic_resume_noirq - Generic resume_noirq callback for subsystems.
* @dev: Device to resume.
*/
int pm_generic_resume_noirq(struct device *dev)
{
- return __pm_generic_resume(dev, PM_EVENT_RESUME, true);
+ return __pm_generic_call(dev, PM_EVENT_RESUME, true);
}
EXPORT_SYMBOL_GPL(pm_generic_resume_noirq);
@@ -270,7 +232,7 @@ EXPORT_SYMBOL_GPL(pm_generic_resume_noirq);
*/
int pm_generic_resume(struct device *dev)
{
- return __pm_generic_resume(dev, PM_EVENT_RESUME, false);
+ return __pm_generic_call(dev, PM_EVENT_RESUME, false);
}
EXPORT_SYMBOL_GPL(pm_generic_resume);
@@ -280,7 +242,7 @@ EXPORT_SYMBOL_GPL(pm_generic_resume);
*/
int pm_generic_restore_noirq(struct device *dev)
{
- return __pm_generic_resume(dev, PM_EVENT_RESTORE, true);
+ return __pm_generic_call(dev, PM_EVENT_RESTORE, true);
}
EXPORT_SYMBOL_GPL(pm_generic_restore_noirq);
@@ -290,7 +252,7 @@ EXPORT_SYMBOL_GPL(pm_generic_restore_noirq);
*/
int pm_generic_restore(struct device *dev)
{
- return __pm_generic_resume(dev, PM_EVENT_RESTORE, false);
+ return __pm_generic_call(dev, PM_EVENT_RESTORE, false);
}
EXPORT_SYMBOL_GPL(pm_generic_restore);
diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c
index c3d2dfcf438d..b570189d4f2d 100644
--- a/drivers/base/power/main.c
+++ b/drivers/base/power/main.c
@@ -164,8 +164,9 @@ static ktime_t initcall_debug_start(struct device *dev)
ktime_t calltime = ktime_set(0, 0);
if (initcall_debug) {
- pr_info("calling %s+ @ %i\n",
- dev_name(dev), task_pid_nr(current));
+ pr_info("calling %s+ @ %i, parent: %s\n",
+ dev_name(dev), task_pid_nr(current),
+ dev->parent ? dev_name(dev->parent) : "none");
calltime = ktime_get();
}
@@ -210,6 +211,24 @@ static void dpm_wait_for_children(struct device *dev, bool async)
device_for_each_child(dev, &async, dpm_wait_fn);
}
+static int dpm_run_callback(struct device *dev, int (*cb)(struct device *))
+{
+ ktime_t calltime;
+ int error;
+
+ if (!cb)
+ return 0;
+
+ calltime = initcall_debug_start(dev);
+
+ error = cb(dev);
+ suspend_report_result(cb, error);
+
+ initcall_debug_report(dev, calltime, error);
+
+ return error;
+}
+
/**
* pm_op - Execute the PM operation appropriate for given PM event.
* @dev: Device to handle.
@@ -221,59 +240,36 @@ static int pm_op(struct device *dev,
pm_message_t state)
{
int error = 0;
- ktime_t calltime;
-
- calltime = initcall_debug_start(dev);
switch (state.event) {
#ifdef CONFIG_SUSPEND
case PM_EVENT_SUSPEND:
- if (ops->suspend) {
- error = ops->suspend(dev);
- suspend_report_result(ops->suspend, error);
- }
+ error = dpm_run_callback(dev, ops->suspend);
break;
case PM_EVENT_RESUME:
- if (ops->resume) {
- error = ops->resume(dev);
- suspend_report_result(ops->resume, error);
- }
+ error = dpm_run_callback(dev, ops->resume);
break;
#endif /* CONFIG_SUSPEND */
#ifdef CONFIG_HIBERNATE_CALLBACKS
case PM_EVENT_FREEZE:
case PM_EVENT_QUIESCE:
- if (ops->freeze) {
- error = ops->freeze(dev);
- suspend_report_result(ops->freeze, error);
- }
+ error = dpm_run_callback(dev, ops->freeze);
break;
case PM_EVENT_HIBERNATE:
- if (ops->poweroff) {
- error = ops->poweroff(dev);
- suspend_report_result(ops->poweroff, error);
- }
+ error = dpm_run_callback(dev, ops->poweroff);
break;
case PM_EVENT_THAW:
case PM_EVENT_RECOVER:
- if (ops->thaw) {
- error = ops->thaw(dev);
- suspend_report_result(ops->thaw, error);
- }
+ error = dpm_run_callback(dev, ops->thaw);
break;
case PM_EVENT_RESTORE:
- if (ops->restore) {
- error = ops->restore(dev);
- suspend_report_result(ops->restore, error);
- }
+ error = dpm_run_callback(dev, ops->restore);
break;
#endif /* CONFIG_HIBERNATE_CALLBACKS */
default:
error = -EINVAL;
}
- initcall_debug_report(dev, calltime, error);
-
return error;
}
@@ -291,70 +287,36 @@ static int pm_noirq_op(struct device *dev,
pm_message_t state)
{
int error = 0;
- ktime_t calltime = ktime_set(0, 0), delta, rettime;
-
- if (initcall_debug) {
- pr_info("calling %s+ @ %i, parent: %s\n",
- dev_name(dev), task_pid_nr(current),
- dev->parent ? dev_name(dev->parent) : "none");
- calltime = ktime_get();
- }
switch (state.event) {
#ifdef CONFIG_SUSPEND
case PM_EVENT_SUSPEND:
- if (ops->suspend_noirq) {
- error = ops->suspend_noirq(dev);
- suspend_report_result(ops->suspend_noirq, error);
- }
+ error = dpm_run_callback(dev, ops->suspend_noirq);
break;
case PM_EVENT_RESUME:
- if (ops->resume_noirq) {
- error = ops->resume_noirq(dev);
- suspend_report_result(ops->resume_noirq, error);
- }
+ error = dpm_run_callback(dev, ops->resume_noirq);
break;
#endif /* CONFIG_SUSPEND */
#ifdef CONFIG_HIBERNATE_CALLBACKS
case PM_EVENT_FREEZE:
case PM_EVENT_QUIESCE:
- if (ops->freeze_noirq) {
- error = ops->freeze_noirq(dev);
- suspend_report_result(ops->freeze_noirq, error);
- }
+ error = dpm_run_callback(dev, ops->freeze_noirq);
break;
case PM_EVENT_HIBERNATE:
- if (ops->poweroff_noirq) {
- error = ops->poweroff_noirq(dev);
- suspend_report_result(ops->poweroff_noirq, error);
- }
+ error = dpm_run_callback(dev, ops->poweroff_noirq);
break;
case PM_EVENT_THAW:
case PM_EVENT_RECOVER:
- if (ops->thaw_noirq) {
- error = ops->thaw_noirq(dev);
- suspend_report_result(ops->thaw_noirq, error);
- }
+ error = dpm_run_callback(dev, ops->thaw_noirq);
break;
case PM_EVENT_RESTORE:
- if (ops->restore_noirq) {
- error = ops->restore_noirq(dev);
- suspend_report_result(ops->restore_noirq, error);
- }
+ error = dpm_run_callback(dev, ops->restore_noirq);
break;
#endif /* CONFIG_HIBERNATE_CALLBACKS */
default:
error = -EINVAL;
}
- if (initcall_debug) {
- rettime = ktime_get();
- delta = ktime_sub(rettime, calltime);
- printk("initcall %s_i+ returned %d after %Ld usecs\n",
- dev_name(dev), error,
- (unsigned long long)ktime_to_ns(delta) >> 10);
- }
-
return error;
}
@@ -486,26 +448,6 @@ void dpm_resume_noirq(pm_message_t state)
EXPORT_SYMBOL_GPL(dpm_resume_noirq);
/**
- * legacy_resume - Execute a legacy (bus or class) resume callback for device.
- * @dev: Device to resume.
- * @cb: Resume callback to execute.
- */
-static int legacy_resume(struct device *dev, int (*cb)(struct device *dev))
-{
- int error;
- ktime_t calltime;
-
- calltime = initcall_debug_start(dev);
-
- error = cb(dev);
- suspend_report_result(cb, error);
-
- initcall_debug_report(dev, calltime, error);
-
- return error;
-}
-
-/**
* device_resume - Execute "resume" callbacks for given device.
* @dev: Device to handle.
* @state: PM transition of the system being carried out.
@@ -553,7 +495,7 @@ static int device_resume(struct device *dev, pm_message_t state, bool async)
goto End;
} else if (dev->class->resume) {
pm_dev_dbg(dev, state, "legacy class ");
- error = legacy_resume(dev, dev->class->resume);
+ error = dpm_run_callback(dev, dev->class->resume);
goto End;
}
}
@@ -564,7 +506,7 @@ static int device_resume(struct device *dev, pm_message_t state, bool async)
error = pm_op(dev, dev->bus->pm, state);
} else if (dev->bus->resume) {
pm_dev_dbg(dev, state, "legacy ");
- error = legacy_resume(dev, dev->bus->resume);
+ error = dpm_run_callback(dev, dev->bus->resume);
}
}
@@ -763,31 +705,23 @@ static pm_message_t resume_event(pm_message_t sleep_state)
*/
static int device_suspend_noirq(struct device *dev, pm_message_t state)
{
- int error;
+ int error = 0;
if (dev->pm_domain) {
pm_dev_dbg(dev, state, "LATE power domain ");
error = pm_noirq_op(dev, &dev->pm_domain->ops, state);
- if (error)
- return error;
} else if (dev->type && dev->type->pm) {
pm_dev_dbg(dev, state, "LATE type ");
error = pm_noirq_op(dev, dev->type->pm, state);
- if (error)
- return error;
} else if (dev->class && dev->class->pm) {
pm_dev_dbg(dev, state, "LATE class ");
error = pm_noirq_op(dev, dev->class->pm, state);
- if (error)
- return error;
} else if (dev->bus && dev->bus->pm) {
pm_dev_dbg(dev, state, "LATE ");
error = pm_noirq_op(dev, dev->bus->pm, state);
- if (error)
- return error;
}
- return 0;
+ return error;
}
/**
@@ -1033,22 +967,16 @@ static int device_prepare(struct device *dev, pm_message_t state)
if (dev->pm_domain->ops.prepare)
error = dev->pm_domain->ops.prepare(dev);
suspend_report_result(dev->pm_domain->ops.prepare, error);
- if (error)
- goto End;
} else if (dev->type && dev->type->pm) {
pm_dev_dbg(dev, state, "preparing type ");
if (dev->type->pm->prepare)
error = dev->type->pm->prepare(dev);
suspend_report_result(dev->type->pm->prepare, error);
- if (error)
- goto End;
} else if (dev->class && dev->class->pm) {
pm_dev_dbg(dev, state, "preparing class ");
if (dev->class->pm->prepare)
error = dev->class->pm->prepare(dev);
suspend_report_result(dev->class->pm->prepare, error);
- if (error)
- goto End;
} else if (dev->bus && dev->bus->pm) {
pm_dev_dbg(dev, state, "preparing ");
if (dev->bus->pm->prepare)
@@ -1056,7 +984,6 @@ static int device_prepare(struct device *dev, pm_message_t state)
suspend_report_result(dev->bus->pm->prepare, error);
}
- End:
device_unlock(dev);
return error;
generated by cgit v1.2.3 (git 2.0.4) at 2024-11-07 09:53:58 +0000