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path: root/drivers/base/power/suspend.c
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Diffstat (limited to 'drivers/base/power/suspend.c')
-rw-r--r--drivers/base/power/suspend.c16
1 files changed, 14 insertions, 2 deletions
diff --git a/drivers/base/power/suspend.c b/drivers/base/power/suspend.c
index 0ec44ef840b..2ccee3763ac 100644
--- a/drivers/base/power/suspend.c
+++ b/drivers/base/power/suspend.c
@@ -39,6 +39,7 @@ int suspend_device(struct device * dev, pm_message_t state)
{
int error = 0;
+ down(&dev->sem);
if (dev->power.power_state) {
dev_dbg(dev, "PM: suspend %d-->%d\n",
dev->power.power_state, state);
@@ -58,7 +59,7 @@ int suspend_device(struct device * dev, pm_message_t state)
dev_dbg(dev, "suspending\n");
error = dev->bus->suspend(dev, state);
}
-
+ up(&dev->sem);
return error;
}
@@ -113,8 +114,19 @@ int device_suspend(pm_message_t state)
put_device(dev);
}
up(&dpm_list_sem);
- if (error)
+ if (error) {
+ /* we failed... before resuming, bring back devices from
+ * dpm_off_irq list back to main dpm_off list, we do want
+ * to call resume() on them, in case they partially suspended
+ * despite returning -EAGAIN
+ */
+ while (!list_empty(&dpm_off_irq)) {
+ struct list_head * entry = dpm_off_irq.next;
+ list_del(entry);
+ list_add(entry, &dpm_off);
+ }
dpm_resume();
+ }
up(&dpm_sem);
return error;
}