Merge branch 'next-mtd' of git://aeryn.fluff.org.uk/bjdooks/linux

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c
index 69b4ddb7de3b..3e4bc699bc0f 100644
--- a/drivers/base/power/main.c
+++ b/drivers/base/power/main.c
@@ -357,6 +357,7 @@ static void dpm_power_up(pm_message_t state)
 {
         struct device *dev;
 
+        mutex_lock(&dpm_list_mtx);
         list_for_each_entry(dev, &dpm_list, power.entry)
                 if (dev->power.status > DPM_OFF) {
                         int error;
@@ -366,6 +367,7 @@ static void dpm_power_up(pm_message_t state)
                         if (error)
                                 pm_dev_err(dev, state, " early", error);
                 }
+        mutex_unlock(&dpm_list_mtx);
 }
 
 /**
@@ -614,6 +616,7 @@ int device_power_down(pm_message_t state)
         int error = 0;
 
         suspend_device_irqs();
+        mutex_lock(&dpm_list_mtx);
         list_for_each_entry_reverse(dev, &dpm_list, power.entry) {
                 error = suspend_device_noirq(dev, state);
                 if (error) {
@@ -622,6 +625,7 @@ int device_power_down(pm_message_t state)
                 }
                 dev->power.status = DPM_OFF_IRQ;
         }
+        mutex_unlock(&dpm_list_mtx);
         if (error)
                 device_power_up(resume_event(state));
         return error;