From 9eff1140a82db8c5520f76e51c21827b4af670b3 Mon Sep 17 00:00:00 2001 From: Alexander Usyskin Date: Tue, 8 Nov 2016 17:55:52 +0200 Subject: [PATCH] watchdog: mei_wdt: request stop on reboot to prevent false positive event Systemd on reboot enables shutdown watchdog that leaves the watchdog device open to ensure that even if power down process get stuck the platform reboots nonetheless. The iamt_wdt is an alarm-only watchdog and can't reboot system, but the FW will generate an alarm event reboot was completed in time, as the watchdog is not automatically disabled during power cycle. So we should request stop watchdog on reboot to eliminate wrong alarm from the FW. Cc: Signed-off-by: Alexander Usyskin Signed-off-by: Tomas Winkler Reviewed-by: Guenter Roeck Signed-off-by: Guenter Roeck --- drivers/watchdog/mei_wdt.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/watchdog/mei_wdt.c b/drivers/watchdog/mei_wdt.c index 630bd189f167..2a9d5cdedea2 100644 --- a/drivers/watchdog/mei_wdt.c +++ b/drivers/watchdog/mei_wdt.c @@ -389,6 +389,8 @@ static int mei_wdt_register(struct mei_wdt *wdt) wdt->wdd.max_timeout = MEI_WDT_MAX_TIMEOUT; watchdog_set_drvdata(&wdt->wdd, wdt); + watchdog_stop_on_reboot(&wdt->wdd); + ret = watchdog_register_device(&wdt->wdd); if (ret) { dev_err(dev, "unable to register watchdog device = %d.\n", ret);