Power Management: use mutexes instead of semaphores

The Power Management code uses semaphores as mutexes.  Use the mutex API
instead of the (binary) semaphores.

Signed-off-by: Matthias Kaehlcke <matthias.kaehlcke@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 6 insertions, 6 deletions

diff --git a/drivers/base/power/runtime.c b/drivers/base/power/runtime.c
index 96370ec1d673..df6174d85866 100644
--- a/drivers/base/power/runtime.c
+++ b/drivers/base/power/runtime.c
@@ -32,9 +32,9 @@ static void runtime_resume(struct device * dev)
 
 void dpm_runtime_resume(struct device * dev)
 {
-        down(&dpm_sem);
+        mutex_lock(&dpm_mtx);
         runtime_resume(dev);
-        up(&dpm_sem);
+        mutex_unlock(&dpm_mtx);
 }
 EXPORT_SYMBOL(dpm_runtime_resume);
 
@@ -49,7 +49,7 @@ int dpm_runtime_suspend(struct device * dev, pm_message_t state)
 {
         int error = 0;
 
-        down(&dpm_sem);
+        mutex_lock(&dpm_mtx);
         if (dev->power.power_state.event == state.event)
                 goto Done;
 
@@ -59,7 +59,7 @@ int dpm_runtime_suspend(struct device * dev, pm_message_t state)
         if (!(error = suspend_device(dev, state)))
                 dev->power.power_state = state;
  Done:
-        up(&dpm_sem);
+        mutex_unlock(&dpm_mtx);
         return error;
 }
 EXPORT_SYMBOL(dpm_runtime_suspend);
@@ -78,8 +78,8 @@ EXPORT_SYMBOL(dpm_runtime_suspend);
  */
 void dpm_set_power_state(struct device * dev, pm_message_t state)
 {
-        down(&dpm_sem);
+        mutex_lock(&dpm_mtx);
         dev->power.power_state = state;
-        up(&dpm_sem);
+        mutex_unlock(&dpm_mtx);
 }
 #endif  /*  0  */