1 files changed, 22 insertions, 13 deletions

diff --git a/drivers/rtc/rtc-cmos.c b/drivers/rtc/rtc-cmos.c
index a6727d9..be06d71 100644
--- a/drivers/rtc/rtc-cmos.c
+++ b/drivers/rtc/rtc-cmos.c
@@ -556,17 +556,24 @@ static irqreturn_t cmos_interrupt(int irq, void *p)
 	rtc_control = CMOS_READ(RTC_CONTROL);
 	if (is_hpet_enabled())
 		irqstat = (unsigned long)irq & 0xF0;
-	irqstat &= (rtc_control & RTC_IRQMASK) | RTC_IRQF;
+
+	/* If we were suspended, RTC_CONTROL may not be accurate since the
+	 * bios may have cleared it.
+	 */
+	if (!cmos_rtc.suspend_ctrl)
+		irqstat &= (rtc_control & RTC_IRQMASK) | RTC_IRQF;
+	else
+		irqstat &= (cmos_rtc.suspend_ctrl & 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) {
+		cmos_rtc.suspend_ctrl &= ~RTC_AIE;
 		rtc_control &= ~RTC_AIE;
 		CMOS_WRITE(rtc_control, RTC_CONTROL);
 		hpet_mask_rtc_irq_bit(RTC_AIE);
-
 		CMOS_READ(RTC_INTR_FLAGS);
 	}
 	spin_unlock(&rtc_lock);
@@ -839,21 +846,23 @@ static inline int cmos_poweroff(struct device *dev)
 static int cmos_resume(struct device *dev)
 {
 	struct cmos_rtc	*cmos = dev_get_drvdata(dev);
-	unsigned char	tmp = cmos->suspend_ctrl;
+	unsigned char tmp;
+
+	if (cmos->enabled_wake) {
+		if (cmos->wake_off)
+			cmos->wake_off(dev);
+		else
+			disable_irq_wake(cmos->irq);
+		cmos->enabled_wake = 0;
+	}
 
+	spin_lock_irq(&rtc_lock);
+	tmp = cmos->suspend_ctrl;
+	cmos->suspend_ctrl = 0;
 	/* re-enable any irqs previously active */
 	if (tmp & RTC_IRQMASK) {
 		unsigned char	mask;
 
-		if (cmos->enabled_wake) {
-			if (cmos->wake_off)
-				cmos->wake_off(dev);
-			else
-				disable_irq_wake(cmos->irq);
-			cmos->enabled_wake = 0;
-		}
-
-		spin_lock_irq(&rtc_lock);
 		if (device_may_wakeup(dev))
 			hpet_rtc_timer_init();
 
@@ -873,8 +882,8 @@ static int cmos_resume(struct device *dev)
 			tmp &= ~RTC_AIE;
 			hpet_mask_rtc_irq_bit(RTC_AIE);
 		} while (mask & RTC_AIE);
-		spin_unlock_irq(&rtc_lock);
 	}
+	spin_unlock_irq(&rtc_lock);
 
 	dev_dbg(dev, "resume, ctrl %02x\n", tmp);