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authorAlexander Usyskin <alexander.usyskin@intel.com>2016-11-08 17:55:52 +0200
committerGuenter Roeck <linux@roeck-us.net>2016-12-16 06:53:54 -0800
commit9eff1140a82db8c5520f76e51c21827b4af670b3 (patch)
tree770c7ba6d2805751c9c2cf0e7707daee11973687 /drivers/watchdog
parent4cfccbdaa234b6564326ed3bf18c38f73693fe14 (diff)
downloadlinux-9eff1140a82db8c5520f76e51c21827b4af670b3.tar.bz2
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: <stable@vger.kernel.org> Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'drivers/watchdog')
-rw-r--r--drivers/watchdog/mei_wdt.c2
1 files changed, 2 insertions, 0 deletions
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);