watchdog: mei_wdt: request stop on reboot to prevent false positive e…

…vent 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: <[email protected]> Signed-off-by: Alexander Usyskin <[email protected]> Signed-off-by: Tomas Winkler <[email protected]> Reviewed-by: Guenter Roeck <[email protected]> Signed-off-by: Guenter Roeck <[email protected]>
redbrain17 · Dec 16, 2016 · 9eff114 · 9eff114
1 parent 4cfccbd
commit 9eff114
Showing 1 changed file with 2 additions and 0 deletions.
diff --git 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);