From d88048a3d7b795e08def7519626496e1f2d3931b Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Fri, 2 Dec 2011 16:02:45 +0100 Subject: clockevents: Set noop handler in clockevents_exchange_device() commit de28f25e8244c7353abed8de0c7792f5f883588c upstream. If a device is shutdown, then there might be a pending interrupt, which will be processed after we reenable interrupts, which causes the original handler to be run. If the old handler is the (broadcast) periodic handler the shutdown state might hang the kernel completely. Signed-off-by: Thomas Gleixner Signed-off-by: Greg Kroah-Hartman --- kernel/time/clockevents.c | 1 + 1 file changed, 1 insertion(+) (limited to 'kernel') diff --git a/kernel/time/clockevents.c b/kernel/time/clockevents.c index 0d809ae02d6..b38baff61c0 100644 --- a/kernel/time/clockevents.c +++ b/kernel/time/clockevents.c @@ -221,6 +221,7 @@ void clockevents_exchange_device(struct clock_event_device *old, * released list and do a notify add later. */ if (old) { + old->event_handler = clockevents_handle_noop; clockevents_set_mode(old, CLOCK_EVT_MODE_UNUSED); list_del(&old->list); list_add(&old->list, &clockevents_released); -- cgit v1.2.3-18-g5258