drivers/rtc/rtc-cmos.c: fix accidentally enabling rtc channel

During resume, we call hpet_rtc_timer_init after masking an irq bit in
hpet.  This will cause the call to hpet_disable_rtc_channel to be undone
if RTC_AIE is the only bit not masked.

Allowing the cmos interrupt handler to run before resuming caused some
issues where the timer for the alarm was not removed.  This would cause
other, later timers to not be cleared, so utilities such as hwclock
would time out when waiting for the update interrupt.

[akpm@linux-foundation.org: coding-style tweak]
Signed-off-by: Derek Basehore <dbasehore@chromium.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Derek Basehore 2013-06-12 14:04:45 -07:00 коммит произвёл Linus Torvalds
Родитель 5a280844bb
Коммит ebf8d6c863
1 изменённых файлов: 3 добавлений и 1 удалений

Просмотреть файл

@ -854,6 +854,9 @@ static int cmos_resume(struct device *dev)
}
spin_lock_irq(&rtc_lock);
if (device_may_wakeup(dev))
hpet_rtc_timer_init();
do {
CMOS_WRITE(tmp, RTC_CONTROL);
hpet_set_rtc_irq_bit(tmp & RTC_IRQMASK);
@ -869,7 +872,6 @@ static int cmos_resume(struct device *dev)
rtc_update_irq(cmos->rtc, 1, mask);
tmp &= ~RTC_AIE;
hpet_mask_rtc_irq_bit(RTC_AIE);
hpet_rtc_timer_init();
} while (mask & RTC_AIE);
spin_unlock_irq(&rtc_lock);
}