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path: root/drivers/base/power/runtime.c
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Diffstat (limited to 'drivers/base/power/runtime.c')
-rw-r--r--drivers/base/power/runtime.c75
1 files changed, 39 insertions, 36 deletions
diff --git a/drivers/base/power/runtime.c b/drivers/base/power/runtime.c
index ec08f1ae63f1..0c1db879544b 100644
--- a/drivers/base/power/runtime.c
+++ b/drivers/base/power/runtime.c
@@ -10,7 +10,7 @@
#include <linux/pm_runtime.h>
#include <linux/jiffies.h>
-static int __pm_runtime_resume(struct device *dev, bool from_wq);
+static int __pm_runtime_resume(struct device *dev, int rpmflags);
static int __pm_request_idle(struct device *dev);
static int __pm_request_resume(struct device *dev);
@@ -164,24 +164,24 @@ EXPORT_SYMBOL_GPL(pm_runtime_idle);
/**
* __pm_runtime_suspend - Carry out run-time suspend of given device.
* @dev: Device to suspend.
- * @from_wq: If set, the function has been called via pm_wq.
+ * @rpmflags: Flag bits.
*
* Check if the device can be suspended and run the ->runtime_suspend() callback
- * provided by its bus type. If another suspend has been started earlier, wait
- * for it to finish. If an idle notification or suspend request is pending or
+ * provided by its bus type. If another suspend has been started earlier,
+ * either return immediately or wait for it to finish, depending on the
+ * RPM_NOWAIT flag. If an idle notification or suspend request is pending or
* scheduled, cancel it.
*
* This function must be called under dev->power.lock with interrupts disabled.
*/
-int __pm_runtime_suspend(struct device *dev, bool from_wq)
+static int __pm_runtime_suspend(struct device *dev, int rpmflags)
__releases(&dev->power.lock) __acquires(&dev->power.lock)
{
struct device *parent = NULL;
bool notify = false;
int retval = 0;
- dev_dbg(dev, "__pm_runtime_suspend()%s!\n",
- from_wq ? " from workqueue" : "");
+ dev_dbg(dev, "%s flags 0x%x\n", __func__, rpmflags);
repeat:
if (dev->power.runtime_error) {
@@ -213,7 +213,7 @@ int __pm_runtime_suspend(struct device *dev, bool from_wq)
if (dev->power.runtime_status == RPM_SUSPENDING) {
DEFINE_WAIT(wait);
- if (from_wq) {
+ if (rpmflags & RPM_NOWAIT) {
retval = -EINPROGRESS;
goto out;
}
@@ -286,7 +286,7 @@ int __pm_runtime_suspend(struct device *dev, bool from_wq)
wake_up_all(&dev->power.wait_queue);
if (dev->power.deferred_resume) {
- __pm_runtime_resume(dev, false);
+ __pm_runtime_resume(dev, 0);
retval = -EAGAIN;
goto out;
}
@@ -303,7 +303,7 @@ int __pm_runtime_suspend(struct device *dev, bool from_wq)
}
out:
- dev_dbg(dev, "__pm_runtime_suspend() returns %d!\n", retval);
+ dev_dbg(dev, "%s returns %d\n", __func__, retval);
return retval;
}
@@ -317,7 +317,7 @@ int pm_runtime_suspend(struct device *dev)
int retval;
spin_lock_irq(&dev->power.lock);
- retval = __pm_runtime_suspend(dev, false);
+ retval = __pm_runtime_suspend(dev, 0);
spin_unlock_irq(&dev->power.lock);
return retval;
@@ -327,24 +327,25 @@ EXPORT_SYMBOL_GPL(pm_runtime_suspend);
/**
* __pm_runtime_resume - Carry out run-time resume of given device.
* @dev: Device to resume.
- * @from_wq: If set, the function has been called via pm_wq.
+ * @rpmflags: Flag bits.
*
* Check if the device can be woken up and run the ->runtime_resume() callback
- * provided by its bus type. If another resume has been started earlier, wait
- * for it to finish. If there's a suspend running in parallel with this
- * function, wait for it to finish and resume the device. Cancel any scheduled
- * or pending requests.
+ * provided by its bus type. If another resume has been started earlier,
+ * either return imediately or wait for it to finish, depending on the
+ * RPM_NOWAIT flag. If there's a suspend running in parallel with this
+ * function, either tell the other process to resume after suspending
+ * (deferred_resume) or wait for it to finish, depending on the RPM_NOWAIT
+ * flag. Cancel any scheduled or pending requests.
*
* This function must be called under dev->power.lock with interrupts disabled.
*/
-int __pm_runtime_resume(struct device *dev, bool from_wq)
+static int __pm_runtime_resume(struct device *dev, int rpmflags)
__releases(&dev->power.lock) __acquires(&dev->power.lock)
{
struct device *parent = NULL;
int retval = 0;
- dev_dbg(dev, "__pm_runtime_resume()%s!\n",
- from_wq ? " from workqueue" : "");
+ dev_dbg(dev, "%s flags 0x%x\n", __func__, rpmflags);
repeat:
if (dev->power.runtime_error) {
@@ -365,7 +366,7 @@ int __pm_runtime_resume(struct device *dev, bool from_wq)
|| dev->power.runtime_status == RPM_SUSPENDING) {
DEFINE_WAIT(wait);
- if (from_wq) {
+ if (rpmflags & RPM_NOWAIT) {
if (dev->power.runtime_status == RPM_SUSPENDING)
dev->power.deferred_resume = true;
retval = -EINPROGRESS;
@@ -407,7 +408,7 @@ int __pm_runtime_resume(struct device *dev, bool from_wq)
*/
if (!parent->power.disable_depth
&& !parent->power.ignore_children) {
- __pm_runtime_resume(parent, false);
+ __pm_runtime_resume(parent, 0);
if (parent->power.runtime_status != RPM_ACTIVE)
retval = -EBUSY;
}
@@ -470,7 +471,7 @@ int __pm_runtime_resume(struct device *dev, bool from_wq)
spin_lock_irq(&dev->power.lock);
}
- dev_dbg(dev, "__pm_runtime_resume() returns %d!\n", retval);
+ dev_dbg(dev, "%s returns %d\n", __func__, retval);
return retval;
}
@@ -484,7 +485,7 @@ int pm_runtime_resume(struct device *dev)
int retval;
spin_lock_irq(&dev->power.lock);
- retval = __pm_runtime_resume(dev, false);
+ retval = __pm_runtime_resume(dev, 0);
spin_unlock_irq(&dev->power.lock);
return retval;
@@ -519,10 +520,10 @@ static void pm_runtime_work(struct work_struct *work)
__pm_runtime_idle(dev);
break;
case RPM_REQ_SUSPEND:
- __pm_runtime_suspend(dev, true);
+ __pm_runtime_suspend(dev, RPM_NOWAIT);
break;
case RPM_REQ_RESUME:
- __pm_runtime_resume(dev, true);
+ __pm_runtime_resume(dev, RPM_NOWAIT);
break;
}
@@ -782,17 +783,18 @@ EXPORT_SYMBOL_GPL(pm_request_resume);
/**
* __pm_runtime_get - Reference count a device and wake it up, if necessary.
* @dev: Device to handle.
- * @sync: If set and the device is suspended, resume it synchronously.
+ * @rpmflags: Flag bits.
*
* Increment the usage count of the device and resume it or submit a resume
- * request for it, depending on the value of @sync.
+ * request for it, depending on the RPM_ASYNC flag bit.
*/
-int __pm_runtime_get(struct device *dev, bool sync)
+int __pm_runtime_get(struct device *dev, int rpmflags)
{
int retval;
atomic_inc(&dev->power.usage_count);
- retval = sync ? pm_runtime_resume(dev) : pm_request_resume(dev);
+ retval = (rpmflags & RPM_ASYNC) ?
+ pm_request_resume(dev) : pm_runtime_resume(dev);
return retval;
}
@@ -801,18 +803,19 @@ EXPORT_SYMBOL_GPL(__pm_runtime_get);
/**
* __pm_runtime_put - Decrement the device's usage counter and notify its bus.
* @dev: Device to handle.
- * @sync: If the device's bus type is to be notified, do that synchronously.
+ * @rpmflags: Flag bits.
*
* Decrement the usage count of the device and if it reaches zero, carry out a
* synchronous idle notification or submit an idle notification request for it,
- * depending on the value of @sync.
+ * depending on the RPM_ASYNC flag bit.
*/
-int __pm_runtime_put(struct device *dev, bool sync)
+int __pm_runtime_put(struct device *dev, int rpmflags)
{
int retval = 0;
if (atomic_dec_and_test(&dev->power.usage_count))
- retval = sync ? pm_runtime_idle(dev) : pm_request_idle(dev);
+ retval = (rpmflags & RPM_ASYNC) ?
+ pm_request_idle(dev) : pm_runtime_idle(dev);
return retval;
}
@@ -967,7 +970,7 @@ int pm_runtime_barrier(struct device *dev)
if (dev->power.request_pending
&& dev->power.request == RPM_REQ_RESUME) {
- __pm_runtime_resume(dev, false);
+ __pm_runtime_resume(dev, 0);
retval = 1;
}
@@ -1016,7 +1019,7 @@ void __pm_runtime_disable(struct device *dev, bool check_resume)
*/
pm_runtime_get_noresume(dev);
- __pm_runtime_resume(dev, false);
+ __pm_runtime_resume(dev, 0);
pm_runtime_put_noidle(dev);
}
@@ -1064,7 +1067,7 @@ void pm_runtime_forbid(struct device *dev)
dev->power.runtime_auto = false;
atomic_inc(&dev->power.usage_count);
- __pm_runtime_resume(dev, false);
+ __pm_runtime_resume(dev, 0);
out:
spin_unlock_irq(&dev->power.lock);
generated by cgit v1.2.3 (git 2.0.4) at 2024-11-04 17:52:56 +0000