Commit de28f25e authored by Thomas Gleixner's avatar Thomas Gleixner

clockevents: Set noop handler in clockevents_exchange_device()

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: default avatarThomas Gleixner <tglx@linutronix.de>
Cc: stable@vger.kernel.org
parent c1be8430
...@@ -387,6 +387,7 @@ void clockevents_exchange_device(struct clock_event_device *old, ...@@ -387,6 +387,7 @@ void clockevents_exchange_device(struct clock_event_device *old,
* released list and do a notify add later. * released list and do a notify add later.
*/ */
if (old) { if (old) {
old->event_handler = clockevents_handle_noop;
clockevents_set_mode(old, CLOCK_EVT_MODE_UNUSED); clockevents_set_mode(old, CLOCK_EVT_MODE_UNUSED);
list_del(&old->list); list_del(&old->list);
list_add(&old->list, &clockevents_released); list_add(&old->list, &clockevents_released);
......
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