blackfin RTC driver: wait for the write complete interrupt complete before sleeping

Since we use the write complete interrupt, wait for it
to complete before sleeping so we don't wake right back up due to it
Signed-off-by: NMike Frysinger <vapier.adi@gmail.com>
Signed-off-by: NBryan Wu <cooloney@kernel.org>
Cc: David Brownell <david-b@pacbell.net>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

drivers/rtc/rtc-bfin.c

@@ -435,9 +435,10 @@ static int __devexit bfin_rtc_remove(struct platform_device *pdev)
 #ifdef CONFIG_PM
 static int bfin_rtc_suspend(struct platform_device *pdev, pm_message_t state)
 {
-	if (device_may_wakeup(&pdev->dev))
+	if (device_may_wakeup(&pdev->dev)) {
 		enable_irq_wake(IRQ_RTC);
-	else
+		bfin_rtc_sync_pending(&pdev->dev);
+	} else
 		bfin_rtc_int_clear(-1);
 
 	return 0;