From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:50822 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1760596AbdADOA0 (ORCPT ); Wed, 4 Jan 2017 09:00:26 -0500 Subject: Patch "watchdog: mei_wdt: request stop on reboot to prevent false positive event" has been added to the 4.8-stable tree To: alexander.usyskin@intel.com, gregkh@linuxfoundation.org, linux@roeck-us.net, tomas.winkler@intel.com Cc: , From: Date: Wed, 04 Jan 2017 14:59:40 +0100 Message-ID: <148353838020783@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled watchdog: mei_wdt: request stop on reboot to prevent false positive event to the 4.8-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: watchdog-mei_wdt-request-stop-on-reboot-to-prevent-false-positive-event.patch and it can be found in the queue-4.8 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From 9eff1140a82db8c5520f76e51c21827b4af670b3 Mon Sep 17 00:00:00 2001 From: Alexander Usyskin Date: Tue, 8 Nov 2016 17:55:52 +0200 Subject: watchdog: mei_wdt: request stop on reboot to prevent false positive event From: Alexander Usyskin commit 9eff1140a82db8c5520f76e51c21827b4af670b3 upstream. 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. Signed-off-by: Alexander Usyskin Signed-off-by: Tomas Winkler Reviewed-by: Guenter Roeck Signed-off-by: Guenter Roeck Signed-off-by: Greg Kroah-Hartman --- drivers/watchdog/mei_wdt.c | 2 ++ 1 file changed, 2 insertions(+) --- a/drivers/watchdog/mei_wdt.c +++ b/drivers/watchdog/mei_wdt.c @@ -389,6 +389,8 @@ static int mei_wdt_register(struct mei_w 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); Patches currently in stable-queue which might be from alexander.usyskin@intel.com are queue-4.8/watchdog-mei_wdt-request-stop-on-reboot-to-prevent-false-positive-event.patch