From patchwork Tue Apr 26 07:03:05 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Liu Xinpeng X-Patchwork-Id: 567455 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 523B2C433F5 for ; Tue, 26 Apr 2022 07:03:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1343612AbiDZHGg (ORCPT ); Tue, 26 Apr 2022 03:06:36 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49940 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237537AbiDZHGf (ORCPT ); Tue, 26 Apr 2022 03:06:35 -0400 Received: from chinatelecom.cn (prt-mail.chinatelecom.cn [42.123.76.226]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 624F66D4C2; Tue, 26 Apr 2022 00:03:28 -0700 (PDT) HMM_SOURCE_IP: 172.18.0.48:51254.2065698957 HMM_ATTACHE_NUM: 0000 HMM_SOURCE_TYPE: SMTP Received: from clientip-202.80.192.38 (unknown [172.18.0.48]) by chinatelecom.cn (HERMES) with SMTP id 21DF62800EF; Tue, 26 Apr 2022 15:03:23 +0800 (CST) X-189-SAVE-TO-SEND: +liuxp11@chinatelecom.cn Received: from ([172.18.0.48]) by app0024 with ESMTP id affb20ac56934473b525a5a5f1ff55a5 for wim@linux-watchdog.org; Tue, 26 Apr 2022 15:03:27 CST X-Transaction-ID: affb20ac56934473b525a5a5f1ff55a5 X-Real-From: liuxp11@chinatelecom.cn X-Receive-IP: 172.18.0.48 X-MEDUSA-Status: 0 Sender: liuxp11@chinatelecom.cn From: Liu Xinpeng To: wim@linux-watchdog.org, linux@roeck-us.net, tzungbi@kernel.org Cc: linux-watchdog@vger.kernel.org, linux-kernel@vger.kernel.org, Liu Xinpeng Subject: [PATCH v4 1/4] watchdog: wdat_wdg: Using the existed function to check parameter timeout Date: Tue, 26 Apr 2022 15:03:05 +0800 Message-Id: <1650956588-795-2-git-send-email-liuxp11@chinatelecom.cn> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1650956588-795-1-git-send-email-liuxp11@chinatelecom.cn> References: <1650956588-795-1-git-send-email-liuxp11@chinatelecom.cn> Precedence: bulk List-ID: X-Mailing-List: linux-watchdog@vger.kernel.org Context: If max_hw_heartbeat_ms is provided, the configured maximum timeout is not limited by it. The limit check in this driver therefore doesn't make much sense. Similar, the watchdog core ensures that minimum timeout limits are met if min_hw_heartbeat_ms is set. Using watchdog_timeout_invalid() makes more sense because it takes this into account. Signed-off-by: Liu Xinpeng Reviewed-by: Guenter Roeck Reviewed-by: Tzung-Bi Shih --- drivers/watchdog/wdat_wdt.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/watchdog/wdat_wdt.c b/drivers/watchdog/wdat_wdt.c index 195c8c004b69..9db01d165310 100644 --- a/drivers/watchdog/wdat_wdt.c +++ b/drivers/watchdog/wdat_wdt.c @@ -55,6 +55,7 @@ MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")"); #define WDAT_DEFAULT_TIMEOUT 30 +#define WDAT_MIN_TIMEOUT 1 static int timeout = WDAT_DEFAULT_TIMEOUT; module_param(timeout, int, 0); @@ -344,6 +345,7 @@ static int wdat_wdt_probe(struct platform_device *pdev) wdat->period = tbl->timer_period; wdat->wdd.min_hw_heartbeat_ms = wdat->period * tbl->min_count; wdat->wdd.max_hw_heartbeat_ms = wdat->period * tbl->max_count; + wdat->wdd.min_timeout = WDAT_MIN_TIMEOUT; wdat->stopped_in_sleep = tbl->flags & ACPI_WDAT_STOPPED; wdat->wdd.info = &wdat_wdt_info; wdat->wdd.ops = &wdat_wdt_ops; @@ -450,8 +452,7 @@ static int wdat_wdt_probe(struct platform_device *pdev) * watchdog properly after it has opened the device. In some cases * the BIOS default is too short and causes immediate reboot. */ - if (timeout * 1000 < wdat->wdd.min_hw_heartbeat_ms || - timeout * 1000 > wdat->wdd.max_hw_heartbeat_ms) { + if (watchdog_timeout_invalid(&wdat->wdd, timeout)) { dev_warn(dev, "Invalid timeout %d given, using %d\n", timeout, WDAT_DEFAULT_TIMEOUT); timeout = WDAT_DEFAULT_TIMEOUT; From patchwork Tue Apr 26 07:03:06 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Liu Xinpeng X-Patchwork-Id: 566447 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id A6F0CC433EF for ; Tue, 26 Apr 2022 07:03:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1343629AbiDZHGn (ORCPT ); Tue, 26 Apr 2022 03:06:43 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50108 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1343616AbiDZHGi (ORCPT ); Tue, 26 Apr 2022 03:06:38 -0400 Received: from chinatelecom.cn (prt-mail.chinatelecom.cn [42.123.76.226]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id E994A6D4C0; Tue, 26 Apr 2022 00:03:30 -0700 (PDT) HMM_SOURCE_IP: 172.18.0.48:51254.2065698957 HMM_ATTACHE_NUM: 0000 HMM_SOURCE_TYPE: SMTP Received: from clientip-202.80.192.38 (unknown [172.18.0.48]) by chinatelecom.cn (HERMES) with SMTP id ED99028008F; Tue, 26 Apr 2022 15:03:27 +0800 (CST) X-189-SAVE-TO-SEND: +liuxp11@chinatelecom.cn Received: from ([172.18.0.48]) by app0024 with ESMTP id 01340970e1564cc285c864ea13158509 for wim@linux-watchdog.org; Tue, 26 Apr 2022 15:03:29 CST X-Transaction-ID: 01340970e1564cc285c864ea13158509 X-Real-From: liuxp11@chinatelecom.cn X-Receive-IP: 172.18.0.48 X-MEDUSA-Status: 0 Sender: liuxp11@chinatelecom.cn From: Liu Xinpeng To: wim@linux-watchdog.org, linux@roeck-us.net, tzungbi@kernel.org Cc: linux-watchdog@vger.kernel.org, linux-kernel@vger.kernel.org, Liu Xinpeng Subject: [PATCH v4 2/4] watchdog: wdat_wdg: Stop watchdog when rebooting the system Date: Tue, 26 Apr 2022 15:03:06 +0800 Message-Id: <1650956588-795-3-git-send-email-liuxp11@chinatelecom.cn> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1650956588-795-1-git-send-email-liuxp11@chinatelecom.cn> References: <1650956588-795-1-git-send-email-liuxp11@chinatelecom.cn> Precedence: bulk List-ID: X-Mailing-List: linux-watchdog@vger.kernel.org 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: Liu Xinpeng --- drivers/watchdog/wdat_wdt.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/watchdog/wdat_wdt.c b/drivers/watchdog/wdat_wdt.c index 9db01d165310..0ef2b918364a 100644 --- a/drivers/watchdog/wdat_wdt.c +++ b/drivers/watchdog/wdat_wdt.c @@ -463,6 +463,7 @@ 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); } From patchwork Tue Apr 26 07:03:07 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Liu Xinpeng X-Patchwork-Id: 567454 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id D888CC4332F for ; Tue, 26 Apr 2022 07:03:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234947AbiDZHGn (ORCPT ); Tue, 26 Apr 2022 03:06:43 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50308 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1343620AbiDZHGk (ORCPT ); Tue, 26 Apr 2022 03:06:40 -0400 Received: from chinatelecom.cn (prt-mail.chinatelecom.cn [42.123.76.226]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id CCA15F1EE8; Tue, 26 Apr 2022 00:03:33 -0700 (PDT) HMM_SOURCE_IP: 172.18.0.48:51254.2065698957 HMM_ATTACHE_NUM: 0000 HMM_SOURCE_TYPE: SMTP Received: from clientip-202.80.192.38 (unknown [172.18.0.48]) by chinatelecom.cn (HERMES) with SMTP id A41762800CD; Tue, 26 Apr 2022 15:03:30 +0800 (CST) X-189-SAVE-TO-SEND: +liuxp11@chinatelecom.cn Received: from ([172.18.0.48]) by app0024 with ESMTP id 5a96614e8bef454f80a8958a801c77f3 for wim@linux-watchdog.org; Tue, 26 Apr 2022 15:03:32 CST X-Transaction-ID: 5a96614e8bef454f80a8958a801c77f3 X-Real-From: liuxp11@chinatelecom.cn X-Receive-IP: 172.18.0.48 X-MEDUSA-Status: 0 Sender: liuxp11@chinatelecom.cn From: Liu Xinpeng To: wim@linux-watchdog.org, linux@roeck-us.net, tzungbi@kernel.org Cc: linux-watchdog@vger.kernel.org, linux-kernel@vger.kernel.org, Liu Xinpeng Subject: [PATCH v4 3/4] watchdog: wdat_wdg: Stop watchdog when uninstalling module Date: Tue, 26 Apr 2022 15:03:07 +0800 Message-Id: <1650956588-795-4-git-send-email-liuxp11@chinatelecom.cn> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1650956588-795-1-git-send-email-liuxp11@chinatelecom.cn> References: <1650956588-795-1-git-send-email-liuxp11@chinatelecom.cn> Precedence: bulk List-ID: X-Mailing-List: linux-watchdog@vger.kernel.org Test shows that wachdog still reboots machine after the module is removed. Use watchdog_stop_on_unregister to stop the watchdog on removing. Signed-off-by: Liu Xinpeng --- drivers/watchdog/wdat_wdt.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/watchdog/wdat_wdt.c b/drivers/watchdog/wdat_wdt.c index 0ef2b918364a..6732d7fc4f94 100644 --- a/drivers/watchdog/wdat_wdt.c +++ b/drivers/watchdog/wdat_wdt.c @@ -464,6 +464,7 @@ static int wdat_wdt_probe(struct platform_device *pdev) watchdog_set_nowayout(&wdat->wdd, nowayout); watchdog_stop_on_reboot(&wdat->wdd); + watchdog_stop_on_unregister(&wdat->wdd); return devm_watchdog_register_device(dev, &wdat->wdd); }