diff options
Diffstat (limited to 'drivers/rtc/rtc-cmos.c')
| -rw-r--r-- | drivers/rtc/rtc-cmos.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/drivers/rtc/rtc-cmos.c b/drivers/rtc/rtc-cmos.c index ab455ddb16cf..ff7539a4dbea 100644 --- a/drivers/rtc/rtc-cmos.c +++ b/drivers/rtc/rtc-cmos.c @@ -472,10 +472,22 @@ static struct cmos_rtc cmos_rtc; static irqreturn_t cmos_interrupt(int irq, void *p) { u8 irqstat; + u8 rtc_control; spin_lock(&rtc_lock); irqstat = CMOS_READ(RTC_INTR_FLAGS); - irqstat &= (CMOS_READ(RTC_CONTROL) & RTC_IRQMASK) | RTC_IRQF; + rtc_control = CMOS_READ(RTC_CONTROL); + irqstat &= (rtc_control & RTC_IRQMASK) | RTC_IRQF; + + /* All Linux RTC alarms should be treated as if they were oneshot. + * Similar code may be needed in system wakeup paths, in case the + * alarm woke the system. + */ + if (irqstat & RTC_AIE) { + rtc_control &= ~RTC_AIE; + CMOS_WRITE(rtc_control, RTC_CONTROL); + CMOS_READ(RTC_INTR_FLAGS); + } spin_unlock(&rtc_lock); if (is_intr(irqstat)) { |