1 files changed, 21 insertions, 7 deletions

diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c
index aa632020774..06f09bf89cb 100644
--- a/drivers/base/power/main.c
+++ b/drivers/base/power/main.c
@@ -57,7 +57,8 @@ static int async_error;
  */
 void device_pm_init(struct device *dev)
 {
-        dev->power.in_suspend = false;
+        dev->power.is_prepared = false;
+        dev->power.is_suspended = false;
         init_completion(&dev->power.completion);
         complete_all(&dev->power.completion);
         dev->power.wakeup = NULL;
@@ -91,7 +92,7 @@ void device_pm_add(struct device *dev)
         pr_debug("PM: Adding info for %s:%s\n",
                  dev->bus ? dev->bus->name : "No Bus", dev_name(dev));
         mutex_lock(&dpm_list_mtx);
-        if (dev->parent && dev->parent->power.in_suspend)
+        if (dev->parent && dev->parent->power.is_prepared)
                 dev_warn(dev, "parent %s should not be sleeping\n",
                         dev_name(dev->parent));
         list_add_tail(&dev->power.entry, &dpm_list);
@@ -511,7 +512,14 @@ static int device_resume(struct device *dev, pm_message_t state, bool async)
         dpm_wait(dev->parent, async);
         device_lock(dev);
 
-        dev->power.in_suspend = false;
+        /*
+         * This is a fib.  But we'll allow new children to be added below
+         * a resumed device, even if the device hasn't been completed yet.
+         */
+        dev->power.is_prepared = false;
+
+        if (!dev->power.is_suspended)
+                goto Unlock;
 
         if (dev->pwr_domain) {
                 pm_dev_dbg(dev, state, "power domain ");
@@ -548,6 +556,9 @@ static int device_resume(struct device *dev, pm_message_t state, bool async)
         }
 
  End:
+        dev->power.is_suspended = false;
+
+ Unlock:
         device_unlock(dev);
         complete_all(&dev->power.completion);
 
@@ -670,7 +681,7 @@ void dpm_complete(pm_message_t state)
                 struct device *dev = to_device(dpm_prepared_list.prev);
 
                 get_device(dev);
-                dev->power.in_suspend = false;
+                dev->power.is_prepared = false;
                 list_move(&dev->power.entry, &list);
                 mutex_unlock(&dpm_list_mtx);
 
@@ -835,11 +846,11 @@ static int __device_suspend(struct device *dev, pm_message_t state, bool async)
         device_lock(dev);
 
         if (async_error)
-                goto End;
+                goto Unlock;
 
         if (pm_wakeup_pending()) {
                 async_error = -EBUSY;
-                goto End;
+                goto Unlock;
         }
 
         if (dev->pwr_domain) {
@@ -877,6 +888,9 @@ static int __device_suspend(struct device *dev, pm_message_t state, bool async)
         }
 
  End:
+        dev->power.is_suspended = !error;
+
+ Unlock:
         device_unlock(dev);
         complete_all(&dev->power.completion);
 
@@ -1042,7 +1056,7 @@ int dpm_prepare(pm_message_t state)
                         put_device(dev);
                         break;
                 }
-                dev->power.in_suspend = true;
+                dev->power.is_prepared = true;
                 if (!list_empty(&dev->power.entry))
                         list_move_tail(&dev->power.entry, &dpm_prepared_list);
                 put_device(dev);