Commit 131c9cc8 authored Apr 03, 2014 by Alessandro Zummo Committed by Linus Torvalds Apr 03, 2014

rtc: verify a critical argument to rtc_update_irq() before using it



This small addition to the core simplifies code in the drivers and makes
them more robust when handling shared IRQs.

Signed-off-by: Alessandro Zummo <a.zummo@towertech.it>
Cc: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent c93a3ae2

drivers/rtc/interface.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -584,6 +584,9 @@ enum hrtimer_restart rtc_pie_update_irq(struct hrtimer *timer)
		void rtc_update_irq(struct rtc_device *rtc,
		unsigned long num, unsigned long events)
		{
		if (unlikely(IS_ERR_OR_NULL(rtc)))
		return;

		pm_stay_awake(rtc->dev.parent);
		schedule_work(&rtc->irqwork);
		}