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path: root/drivers/base/power/main.c
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Diffstat (limited to 'drivers/base/power/main.c')
-rw-r--r--drivers/base/power/main.c51
1 files changed, 41 insertions, 10 deletions
diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c
index 0e26a6f6fd48..941fcb87e52a 100644
--- a/drivers/base/power/main.c
+++ b/drivers/base/power/main.c
@@ -35,8 +35,8 @@
* because children are guaranteed to be discovered after parents, and
* are inserted at the back of the list on discovery.
*
- * Since device_pm_add() may be called with a device semaphore held,
- * we must never try to acquire a device semaphore while holding
+ * Since device_pm_add() may be called with a device lock held,
+ * we must never try to acquire a device lock while holding
* dpm_list_mutex.
*/
@@ -439,8 +439,23 @@ static int device_resume_noirq(struct device *dev, pm_message_t state)
if (dev->bus && dev->bus->pm) {
pm_dev_dbg(dev, state, "EARLY ");
error = pm_noirq_op(dev, dev->bus->pm, state);
+ if (error)
+ goto End;
}
+ if (dev->type && dev->type->pm) {
+ pm_dev_dbg(dev, state, "EARLY type ");
+ error = pm_noirq_op(dev, dev->type->pm, state);
+ if (error)
+ goto End;
+ }
+
+ if (dev->class && dev->class->pm) {
+ pm_dev_dbg(dev, state, "EARLY class ");
+ error = pm_noirq_op(dev, dev->class->pm, state);
+ }
+
+End:
TRACE_RESUME(error);
return error;
}
@@ -508,7 +523,7 @@ static int device_resume(struct device *dev, pm_message_t state, bool async)
TRACE_RESUME(0);
dpm_wait(dev->parent, async);
- down(&dev->sem);
+ device_lock(dev);
dev->power.status = DPM_RESUMING;
@@ -543,7 +558,7 @@ static int device_resume(struct device *dev, pm_message_t state, bool async)
}
}
End:
- up(&dev->sem);
+ device_unlock(dev);
complete_all(&dev->power.completion);
TRACE_RESUME(error);
@@ -629,7 +644,7 @@ static void dpm_resume(pm_message_t state)
*/
static void device_complete(struct device *dev, pm_message_t state)
{
- down(&dev->sem);
+ device_lock(dev);
if (dev->class && dev->class->pm && dev->class->pm->complete) {
pm_dev_dbg(dev, state, "completing class ");
@@ -646,7 +661,7 @@ static void device_complete(struct device *dev, pm_message_t state)
dev->bus->pm->complete(dev);
}
- up(&dev->sem);
+ device_unlock(dev);
}
/**
@@ -735,10 +750,26 @@ static int device_suspend_noirq(struct device *dev, pm_message_t state)
{
int error = 0;
+ if (dev->class && dev->class->pm) {
+ pm_dev_dbg(dev, state, "LATE class ");
+ error = pm_noirq_op(dev, dev->class->pm, state);
+ if (error)
+ goto End;
+ }
+
+ if (dev->type && dev->type->pm) {
+ pm_dev_dbg(dev, state, "LATE type ");
+ error = pm_noirq_op(dev, dev->type->pm, state);
+ if (error)
+ goto End;
+ }
+
if (dev->bus && dev->bus->pm) {
pm_dev_dbg(dev, state, "LATE ");
error = pm_noirq_op(dev, dev->bus->pm, state);
}
+
+End:
return error;
}
@@ -809,7 +840,7 @@ static int __device_suspend(struct device *dev, pm_message_t state, bool async)
int error = 0;
dpm_wait_for_children(dev, async);
- down(&dev->sem);
+ device_lock(dev);
if (async_error)
goto End;
@@ -849,7 +880,7 @@ static int __device_suspend(struct device *dev, pm_message_t state, bool async)
dev->power.status = DPM_OFF;
End:
- up(&dev->sem);
+ device_unlock(dev);
complete_all(&dev->power.completion);
return error;
@@ -938,7 +969,7 @@ static int device_prepare(struct device *dev, pm_message_t state)
{
int error = 0;
- down(&dev->sem);
+ device_lock(dev);
if (dev->bus && dev->bus->pm && dev->bus->pm->prepare) {
pm_dev_dbg(dev, state, "preparing ");
@@ -962,7 +993,7 @@ static int device_prepare(struct device *dev, pm_message_t state)
suspend_report_result(dev->class->pm->prepare, error);
}
End:
- up(&dev->sem);
+ device_unlock(dev);
return error;
}