1 files changed, 30 insertions, 4 deletions

diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c
index 31b526661ec..ead3e79d6fc 100644
--- a/drivers/base/power/main.c
+++ b/drivers/base/power/main.c
@@ -475,20 +475,33 @@ End:
  */
 void dpm_resume_noirq(pm_message_t state)
 {
-        struct device *dev;
+        struct list_head list;
         ktime_t starttime = ktime_get();
 
+        INIT_LIST_HEAD(&list);
         mutex_lock(&dpm_list_mtx);
         transition_started = false;
-        list_for_each_entry(dev, &dpm_list, power.entry)
+        while (!list_empty(&dpm_list)) {
+                struct device *dev = to_device(dpm_list.next);
+
+                get_device(dev);
                 if (dev->power.status > DPM_OFF) {
                         int error;
 
                         dev->power.status = DPM_OFF;
+                        mutex_unlock(&dpm_list_mtx);
+
                         error = device_resume_noirq(dev, state);
+
+                        mutex_lock(&dpm_list_mtx);
                         if (error)
                                 pm_dev_err(dev, state, " early", error);
                 }
+                if (!list_empty(&dev->power.entry))
+                        list_move_tail(&dev->power.entry, &list);
+                put_device(dev);
+        }
+        list_splice(&list, &dpm_list);
         mutex_unlock(&dpm_list_mtx);
         dpm_show_time(starttime, state, "early");
         resume_device_irqs();
@@ -789,20 +802,33 @@ End:
  */
 int dpm_suspend_noirq(pm_message_t state)
 {
-        struct device *dev;
+        struct list_head list;
         ktime_t starttime = ktime_get();
         int error = 0;
 
+        INIT_LIST_HEAD(&list);
         suspend_device_irqs();
         mutex_lock(&dpm_list_mtx);
-        list_for_each_entry_reverse(dev, &dpm_list, power.entry) {
+        while (!list_empty(&dpm_list)) {
+                struct device *dev = to_device(dpm_list.prev);
+
+                get_device(dev);
+                mutex_unlock(&dpm_list_mtx);
+
                 error = device_suspend_noirq(dev, state);
+
+                mutex_lock(&dpm_list_mtx);
                 if (error) {
                         pm_dev_err(dev, state, " late", error);
+                        put_device(dev);
                         break;
                 }
                 dev->power.status = DPM_OFF_IRQ;
+                if (!list_empty(&dev->power.entry))
+                        list_move(&dev->power.entry, &list);
+                put_device(dev);
         }
+        list_splice_tail(&list, &dpm_list);
         mutex_unlock(&dpm_list_mtx);
         if (error)
                 dpm_resume_noirq(resume_event(state));