diff options
Diffstat (limited to 'kernel/power/qos.c')
| -rw-r--r-- | kernel/power/qos.c | 13 |
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; } /** |