watchdog: wdat_wdt: Ping the watchdog on resume

It turns out we need to ping the watchdog hardware on resume when we
re-program it. Otherwise this causes inadvertent reset to trigger
right after the resume is complete.

Fixes: 058dfc767008 (ACPI / watchdog: Add support for WDAT hardware watchdog)
Signed-off-by: Mika Westerberg <[email protected]>
Acked-by: Guenter Roeck <[email protected]>
Signed-off-by: Rafael J. Wysocki <[email protected]>

diff --git a/drivers/watchdog/wdat_wdt.c b/drivers/watchdog/wdat_wdt.c
index e473e3b237203fcc7440128e804e3bbb141fc0b2..6d1fbda0f461ca2d2304eaeb43aef35adfd77cf4 100644 (file)
--- a/drivers/watchdog/wdat_wdt.c
+++ b/drivers/watchdog/wdat_wdt.c
@@ -499,6 +499,10 @@ static int wdat_wdt_resume_noirq(struct device *dev)
                ret = wdat_wdt_enable_reboot(wdat);
                if (ret)
                        return ret;
+
+               ret = wdat_wdt_ping(&wdat->wdd);
+               if (ret)
+                       return ret;
        }
 
        return wdat_wdt_start(&wdat->wdd);