linux-kernel - Re: [PATCH 0/5] watchdog: Do not use 'dev' from watchdog

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Date:	Thu, 24 Dec 2015 07:25:59 -0800
From:	Guenter Roeck <linux@...ck-us.net>
To:	Damien Riegel <damien.riegel@...oirfairelinux.com>
Cc:	linux-watchdog@...r.kernel.org, Wim Van Sebroeck <wim@...ana.be>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/5] watchdog: Do not use 'dev' from watchdog_device in
 watchdog drivers

On 12/24/2015 07:07 AM, Damien Riegel wrote:
> On Wed, Dec 23, 2015 at 09:11:28PM -0800, Guenter Roeck wrote:
>> The 'dev' variable in watchdog drivers has a different lifetime than the
>> watchdog character device and should therefore not be used by watchdog
>> drivers.
>>
>> Some of the drivers use the variable to print kernel messages. Those are
>> either dropped or converted to use pr_ functions. One driver sets the
>> variable during initialization to the watchdog driver's parent device,
>> which is wrong and also removed.
>
> Hi Guenter,
>
> For gpio_wdt and mena21_wdt, wdd->parent is set and could be used for
> dev_* printings. Do you prefer to keep this variable only for watchdog
> core internal usage? Otherwise, the serie looks good.
>
Good idea, I'll use ->parent for those. ->parent is set by the driver,
so it is safe to be used by the driver.

Thanks,
Guenter

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