diff options
| author | Derek Basehore <dbasehore@chromium.org> | 2013-04-29 16:20:23 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-05-07 19:51:56 -0700 |
| commit | b593b4dc6442a5fd8a569fdbcc8cb5fa2609d1b1 (patch) | |
| tree | 47e84c999a423f31cfa41b111c2d0273fe2600cf /drivers/rtc | |
| parent | 194d30b3996940a012ed8265f3969f1f75ff7ec5 (diff) | |
drivers/rtc/rtc-cmos.c: don't disable hpet emulation on suspend
commit e005715efaf674660ae59af83b13822567e3a758 upstream.
There's a bug where rtc alarms are ignored after the rtc cmos suspends
but before the system finishes suspend. Since hpet emulation is
disabled and it still handles the interrupts, a wake event is never
registered which is done from the rtc layer.
This patch reverts commit d1b2efa83fbf ("rtc: disable hpet emulation on
suspend") which disabled hpet emulation. To fix the problem mentioned
in that commit, hpet_rtc_timer_init() is called directly on resume.
Signed-off-by: Derek Basehore <dbasehore@chromium.org>
Cc: Maxim Levitsky <maximlevitsky@gmail.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/rtc')
| -rw-r--r-- | drivers/rtc/rtc-cmos.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/rtc/rtc-cmos.c b/drivers/rtc/rtc-cmos.c index 7d5f56edb8ef..5f8844c1eaad 100644 --- a/drivers/rtc/rtc-cmos.c +++ b/drivers/rtc/rtc-cmos.c @@ -805,9 +805,8 @@ static int cmos_suspend(struct device *dev) mask = RTC_IRQMASK; tmp &= ~mask; CMOS_WRITE(tmp, RTC_CONTROL); + hpet_mask_rtc_irq_bit(mask); - /* shut down hpet emulation - we don't need it for alarm */ - hpet_mask_rtc_irq_bit(RTC_PIE|RTC_AIE|RTC_UIE); cmos_checkintr(cmos, tmp); } spin_unlock_irq(&rtc_lock); @@ -872,6 +871,7 @@ 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); } |