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Commit a2e2e357 authored by David Brownell's avatar David Brownell Committed by Linus Torvalds
Browse files

pm selftest: rtc paranoia 



Cope with a quirk of some RTCs (notably ACPI ones) which aren't guaranteed
to implement oneshot behavior when they woke the system from sleeep:
forcibly disable the alarm, just in case.

Signed-off-by: default avatarDavid Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 44ccac13

kernel/power/main.c

+7 −0
Original line number Diff line number Diff line
@@ -635,6 +635,13 @@ static void __init test_wakealarm(struct rtc_device *rtc, suspend_state_t state) 
	}

	if (status < 0)

		printk(err_suspend, status);



	/* Some platforms can't detect that the alarm triggered the

	 * wakeup, or (accordingly) disable it after it afterwards.

	 * It's supposed to give oneshot behavior; cope.

	 */

	alm.enabled = false;

	rtc_set_alarm(rtc, &alm);

}



static int __init has_wakealarm(struct device *dev, void *name_ptr)