linux-kernel - Re: [PATCH v8 2/3] watchdog: wdat_wdt: Stop watchdog when rebooting the system

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Date:   Tue, 26 Apr 2022 13:15:27 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     Liu Xinpeng <liuxp11@...natelecom.cn>
Cc:     wim@...ux-watchdog.org, tzungbi@...nel.org,
        linux-watchdog@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v8 2/3] watchdog: wdat_wdt: Stop watchdog when rebooting
 the system

On Tue, Apr 26, 2022 at 10:53:29PM +0800, Liu Xinpeng wrote:
> 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 <liuxp11@...natelecom.cn>

Reviewed-by: Guenter Roeck <linux@...ck-us.net>

> ---
>  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 df0865a61a70..6f36a653767b 100644
> --- a/drivers/watchdog/wdat_wdt.c
> +++ b/drivers/watchdog/wdat_wdt.c
> @@ -462,6 +462,7 @@ 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);
>  }
>  
> -- 
> 2.23.0
>