tick-broadcast: Stop active broadcast device when replacing it

When a better rated broadcast device is installed, then the current
active device is not disabled, which results in two running broadcast
devices.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: stable@vger.kernel.org

diff --git a/kernel/time/tick-broadcast.c b/kernel/time/tick-broadcast.c
index f954282..fd4a7b1 100644 (file)
--- a/kernel/time/tick-broadcast.c
+++ b/kernel/time/tick-broadcast.c
@@ -71,7 +71,7 @@ int tick_check_broadcast_device(struct clock_event_device *dev)
             (dev->features & CLOCK_EVT_FEAT_C3STOP))
                return 0;
 
-       clockevents_exchange_device(NULL, dev);
+       clockevents_exchange_device(tick_broadcast_device.evtdev, dev);
        tick_broadcast_device.evtdev = dev;
        if (!cpumask_empty(tick_get_broadcast_mask()))
                tick_broadcast_start_periodic(dev);