watchdog: at91sam9: request the irq with IRQF_NO_SUSPEND

The watchdog interrupt (only used when activating software watchdog) shouldn't be suspended when entering suspend mode, because it is shared with a timer device (which request the line with IRQF_NO_SUSPEND) and once the watchdog "Mode Register" has been written, it cannot be changed (which means we cannot disable the watchdog interrupt when entering suspend). Signed-off-by: Boris Brezillon <[email protected]> Reviewed-by: Alexandre Belloni <[email protected]> Acked-by: Guenter Roeck <[email protected]> Acked-by: Nicolas Ferre <[email protected]> Signed-off-by: Rafael J. Wysocki <[email protected]>
vieko · Mar 5, 2015 · d677772 · d677772
1 parent 947f5b1
commit d677772
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/drivers/watchdog/at91sam9_wdt.c b/drivers/watchdog/at91sam9_wdt.c
@@ -208,7 +208,8 @@ static int at91_wdt_init(struct platform_device *pdev, struct at91wdt *wdt)
 
 	if ((tmp & AT91_WDT_WDFIEN) && wdt->irq) {
 		err = request_irq(wdt->irq, wdt_interrupt,
-				  IRQF_SHARED | IRQF_IRQPOLL,
+				  IRQF_SHARED | IRQF_IRQPOLL |
+				  IRQF_NO_SUSPEND,
 				  pdev->name, wdt);
 		if (err)
 			return err;