watchdog: tegra: Stop watchdog first if restarting

If we need to restart the watchdog due to someone changing the timeout
interval, stop the watchdog before restarting it.  Otherwise, the new
timeout doesn't seem to take.

Signed-off-by: Andrew Chew <[email protected]>
Reviewed-by: Thierry Reding <[email protected]>
Reviewed-by: Guenter Roeck <[email protected]>
Signed-off-by: Wim Van Sebroeck <[email protected]>

Author: Andrew Chew

drivers/watchdog/tegra_wdt.c

@@ -140,8 +140,10 @@ static int tegra_wdt_set_timeout(struct watchdog_device *wdd,
 {
 	wdd->timeout = timeout;
 
-	if (watchdog_active(wdd))
+	if (watchdog_active(wdd)) {
+		tegra_wdt_stop(wdd);
 		return tegra_wdt_start(wdd);
+	}
 
 	return 0;
 }