watchdog: wdat_wdt: Stop watchdog when rebooting the system

mainline inclusion
from mainline-v5.19-rc1
commit 27fdf845
category: bugfix
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I596BF

Intel-SIG: commit 27fdf845 watchdog: wdat_wdt: Stop watchdog when
rebooting the system

-------------------------------------

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: NLiu Xinpeng <liuxp11@chinatelecom.cn>
Reviewed-by: NGuenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/1650984810-6247-3-git-send-email-liuxp11@chinatelecom.cnSigned-off-by: NGuenter Roeck <linux@roeck-us.net>
Signed-off-by: NWim Van Sebroeck <wim@linux-watchdog.org>
Signed-off-by: NYunying Sun <yunying.sun@intel.com>

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);
 }