1 files changed, 8 insertions, 5 deletions

diff --git a/kernel/power/qos.c b/kernel/power/qos.c
index e23ae38e647f..884b77058864 100644
--- a/kernel/power/qos.c
+++ b/kernel/power/qos.c
@@ -173,6 +173,7 @@ int pm_qos_update_target(struct pm_qos_constraints *c, struct plist_node *node,
 {
         unsigned long flags;
         int prev_value, curr_value, new_value;
+        int ret;
 
         spin_lock_irqsave(&pm_qos_lock, flags);
         prev_value = pm_qos_get_value(c);
@@ -208,13 +209,15 @@ int pm_qos_update_target(struct pm_qos_constraints *c, struct plist_node *node,
 
         trace_pm_qos_update_target(action, prev_value, curr_value);
         if (prev_value != curr_value) {
-                blocking_notifier_call_chain(c->notifiers,
-                                             (unsigned long)curr_value,
-                                             NULL);
-                return 1;
+                ret = 1;
+                if (c->notifiers)
+                        blocking_notifier_call_chain(c->notifiers,
+                                                     (unsigned long)curr_value,
+                                                     NULL);
         } else {
-                return 0;
+                ret = 0;
         }
+        return ret;
 }
 
 /**