[PATCH RESEND] watchdog: at91sam9_wdt: use devm_request_irq to avoid missing free_irq() in error path

[ruanjinjie]

free_irq() is missing in case of error in at91_wdt_init(), use
devm_request_irq to fix that.

Fixes: 5161b31dc39a ("watchdog: at91sam9_wdt: better watchdog support")
Signed-off-by: ruanjinjie <ruanjinjie at huawei.com>
---
 drivers/watchdog/at91sam9_wdt.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/watchdog/at91sam9_wdt.c b/drivers/watchdog/at91sam9_wdt.c
index 292b5a1ca831..b9e8572c707d 100644
--- a/drivers/watchdog/at91sam9_wdt.c
+++ b/drivers/watchdog/at91sam9_wdt.c
@@ -206,7 +206,7 @@ static int at91_wdt_init(struct platform_device *pdev, struct at91wdt *wdt)
 			 "min heartbeat and max heartbeat might be too close for the system to handle it correctly\n");
 
 	if ((tmp & AT91_WDT_WDFIEN) && wdt->irq) {
-		err = request_irq(wdt->irq, wdt_interrupt,
+		err = devm_request_irq(dev, wdt->irq, wdt_interrupt,
 				  IRQF_SHARED | IRQF_IRQPOLL |
 				  IRQF_NO_SUSPEND,
 				  pdev->name, wdt);
-- 
2.25.1