watchdog: wdat_wdt: Stop watchdog when rebooting the system

[ Upstream commit 973d561f5bee7935638637b7224e2b9378ccd155 ]

Executing reboot command several times on the machine "Dell
PowerEdge R740", UEFI security detection stopped machine
with the following prompt:

UEFI0082: The system was reset due to a timeout from the watchdog
timer. Check the System Event Log (SEL) or crash dumps from
Operating Sysstem to identify the source that triggered the
watchdog timer reset. Update the firmware or driver for the
identified device.

iDRAC has warning event: "The watchdog timer reset the system".

This patch fixes this issue by adding the reboot notifier.

Signed-off-by: Liu Xinpeng <liuxp11@chinatelecom.cn>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/1650984810-6247-3-git-send-email-liuxp11@chinatelecom.cn
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/watchdog/wdat_wdt.c b/drivers/watchdog/wdat_wdt.c
index 195c8c004b69d70c213d4d3588ec4bacb8d5e8ce..4fac8148a8e620c949070987560625ddb95c4c77 100644 (file)
--- a/drivers/watchdog/wdat_wdt.c
+++ b/drivers/watchdog/wdat_wdt.c
@@ -462,6 +462,7 @@ static int wdat_wdt_probe(struct platform_device *pdev)
                return ret;
 
        watchdog_set_nowayout(&wdat->wdd, nowayout);
+       watchdog_stop_on_reboot(&wdat->wdd);
        return devm_watchdog_register_device(dev, &wdat->wdd);
 }