linux-kernel - Re: [PATCH v2 2/2] watchdog: add wdt shutdown callback to disable wdt if enabled

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Message-ID: <1488521.5eJqASov2O@ubix>
Date:	Thu, 23 Jul 2015 19:37:03 +0200
From:	Matthias Brugger <matthias.bgg@...il.com>
To:	Eddie Huang <eddie.huang@...iatek.com>
Cc:	Wim Van Sebroeck <wim@...ana.be>,
	Guenter Roeck <linux@...ck-us.net>,
	linux-watchdog@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Sascha Hauer <kernel@...gutronix.de>,
	Greta Zhang <greta.zhang@...iatek.com>
Subject: Re: [PATCH v2 2/2] watchdog: add wdt shutdown callback to disable wdt if enabled

On Thursday, July 23, 2015 01:49:11 PM Eddie Huang wrote:
> From: Greta Zhang <greta.zhang@...iatek.com>
> 
> Without .shutdown(), watchdog might reset the system during power off.
> For example, if watchdog's timeout is set to 30s, then it is reset to
> zero by mtk_wdt_ping(). During power off, no app will ping watchdog,
> but watchdog is still running and may trigger reset.
> 
> Signed-off-by: Greta Zhang <greta.zhang@...iatek.com>
> Signed-off-by: Eddie Huang <eddie.huang@...iatek.com>
> ---
>  drivers/watchdog/mtk_wdt.c | 9 +++++++++
>  1 file changed, 9 insertions(+)

Acked-by: Matthias Brugger <matthias.bgg@...il.com>
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