1 files changed, 32 insertions, 0 deletions

diff --git a/kernel/time/tick-common.c b/kernel/time/tick-common.c
index 0986a2bfab49..43ba1bdec14c 100644
--- a/kernel/time/tick-common.c
+++ b/kernel/time/tick-common.c
@@ -298,6 +298,28 @@ static void tick_shutdown(unsigned int *cpup)
         spin_unlock_irqrestore(&tick_device_lock, flags);
 }
 
+static void tick_suspend_periodic(void)
+{
+        struct tick_device *td = &__get_cpu_var(tick_cpu_device);
+        unsigned long flags;
+
+        spin_lock_irqsave(&tick_device_lock, flags);
+        if (td->mode == TICKDEV_MODE_PERIODIC)
+                clockevents_set_mode(td->evtdev, CLOCK_EVT_MODE_SHUTDOWN);
+        spin_unlock_irqrestore(&tick_device_lock, flags);
+}
+
+static void tick_resume_periodic(void)
+{
+        struct tick_device *td = &__get_cpu_var(tick_cpu_device);
+        unsigned long flags;
+
+        spin_lock_irqsave(&tick_device_lock, flags);
+        if (td->mode == TICKDEV_MODE_PERIODIC)
+                tick_setup_periodic(td->evtdev, 0);
+        spin_unlock_irqrestore(&tick_device_lock, flags);
+}
+
 /*
  * Notification about clock event devices
  */
@@ -325,6 +347,16 @@ static int tick_notify(struct notifier_block *nb, unsigned long reason,
                 tick_shutdown(dev);
                 break;
 
+        case CLOCK_EVT_NOTIFY_SUSPEND:
+                tick_suspend_periodic();
+                tick_suspend_broadcast();
+                break;
+
+        case CLOCK_EVT_NOTIFY_RESUME:
+                if (!tick_resume_broadcast())
+                        tick_resume_periodic();
+                break;
+
         default:
                 break;
         }