1 files changed, 18 insertions, 15 deletions

diff --git a/drivers/base/power/runtime.c b/drivers/base/power/runtime.c
index a770498..5a01ece 100644
--- a/drivers/base/power/runtime.c
+++ b/drivers/base/power/runtime.c
@@ -185,6 +185,7 @@ int __pm_runtime_suspend(struct device *dev, bool from_wq)
 	}
 
 	dev->power.runtime_status = RPM_SUSPENDING;
+	dev->power.deferred_resume = false;
 
 	if (dev->bus && dev->bus->pm && dev->bus->pm->runtime_suspend) {
 		spin_unlock_irq(&dev->power.lock);
@@ -200,7 +201,6 @@ int __pm_runtime_suspend(struct device *dev, bool from_wq)
 	if (retval) {
 		dev->power.runtime_status = RPM_ACTIVE;
 		pm_runtime_cancel_pending(dev);
-		dev->power.deferred_resume = false;
 
 		if (retval == -EAGAIN || retval == -EBUSY) {
 			notify = true;
@@ -217,7 +217,6 @@ int __pm_runtime_suspend(struct device *dev, bool from_wq)
 	wake_up_all(&dev->power.wait_queue);
 
 	if (dev->power.deferred_resume) {
-		dev->power.deferred_resume = false;
 		__pm_runtime_resume(dev, false);
 		retval = -EAGAIN;
 		goto out;
@@ -328,11 +327,11 @@ int __pm_runtime_resume(struct device *dev, bool from_wq)
 		 * necessary.
 		 */
 		parent = dev->parent;
-		spin_unlock_irq(&dev->power.lock);
+		spin_unlock(&dev->power.lock);
 
 		pm_runtime_get_noresume(parent);
 
-		spin_lock_irq(&parent->power.lock);
+		spin_lock(&parent->power.lock);
 		/*
 		 * We can resume if the parent's run-time PM is disabled or it
 		 * is set to ignore children.
@@ -343,9 +342,9 @@ int __pm_runtime_resume(struct device *dev, bool from_wq)
 			if (parent->power.runtime_status != RPM_ACTIVE)
 				retval = -EBUSY;
 		}
-		spin_unlock_irq(&parent->power.lock);
+		spin_unlock(&parent->power.lock);
 
-		spin_lock_irq(&dev->power.lock);
+		spin_lock(&dev->power.lock);
 		if (retval)
 			goto out;
 		goto repeat;
@@ -626,6 +625,8 @@ int pm_schedule_suspend(struct device *dev, unsigned int delay)
 		goto out;
 
 	dev->power.timer_expires = jiffies + msecs_to_jiffies(delay);
+	if (!dev->power.timer_expires)
+		dev->power.timer_expires = 1;
 	mod_timer(&dev->power.suspend_timer, dev->power.timer_expires);
 
  out:
@@ -659,13 +660,17 @@ static int __pm_request_resume(struct device *dev)
 
 	pm_runtime_deactivate_timer(dev);
 
+	if (dev->power.runtime_status == RPM_SUSPENDING) {
+		dev->power.deferred_resume = true;
+		return retval;
+	}
 	if (dev->power.request_pending) {
 		/* If non-resume request is pending, we can overtake it. */
 		dev->power.request = retval ? RPM_REQ_NONE : RPM_REQ_RESUME;
 		return retval;
-	} else if (retval) {
-		return retval;
 	}
+	if (retval)
+		return retval;
 
 	dev->power.request = RPM_REQ_RESUME;
 	dev->power.request_pending = true;
@@ -777,7 +782,7 @@ int __pm_runtime_set_status(struct device *dev, unsigned int status)
 	}
 
 	if (parent) {
-		spin_lock_irq(&parent->power.lock);
+		spin_lock_nested(&parent->power.lock, SINGLE_DEPTH_NESTING);
 
 		/*
 		 * It is invalid to put an active child under a parent that is
@@ -786,14 +791,12 @@ int __pm_runtime_set_status(struct device *dev, unsigned int status)
 		 */
 		if (!parent->power.disable_depth
 		    && !parent->power.ignore_children
-		    && parent->power.runtime_status != RPM_ACTIVE) {
+		    && parent->power.runtime_status != RPM_ACTIVE)
 			error = -EBUSY;
-		} else {
-			if (dev->power.runtime_status == RPM_SUSPENDED)
-				atomic_inc(&parent->power.child_count);
-		}
+		else if (dev->power.runtime_status == RPM_SUSPENDED)
+			atomic_inc(&parent->power.child_count);
 
-		spin_unlock_irq(&parent->power.lock);
+		spin_unlock(&parent->power.lock);
 
 		if (error)
 			goto out;