linux-kernel - Re: [PATCH] counter: Stop using dev_get

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Message-ID: <b9099ac3-a5fa-1aba-92a3-05a7212525ab@linux.intel.com>
Date:   Thu, 17 Feb 2022 16:48:50 +0200
From:   Jarkko Nikula <jarkko.nikula@...ux.intel.com>
To:     William Breathitt Gray <vilhelm.gray@...il.com>,
        Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
Cc:     linux-iio@...r.kernel.org,
        Robin van der Gracht <robin@...tonic.nl>,
        linux-kernel@...r.kernel.org,
        Oleksij Rempel <o.rempel@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        David Jander <david@...tonic.nl>,
        Jonathan Cameron <jic23@...nel.org>
Subject: Re: [PATCH] counter: Stop using dev_get_drvdata() to get the counter
 device

Hi

On 2/8/22 03:42, William Breathitt Gray wrote:
> On Fri, Feb 04, 2022 at 09:25:56AM +0100, Uwe Kleine-König wrote:
>> dev_get_drvdata() returns NULL since commit b56346ddbd82 ("counter: Use
>> container_of instead of drvdata to track counter_device") which wrongly
>> claimed there were no users of drvdata. Convert to container_of() to
>> fix a null pointer dereference.
>>
>> Reported-by: Oleksij Rempel <o.rempel@...gutronix.de>
>> Fixes: b56346ddbd82 ("counter: Use container_of instead of drvdata to track counter_device")
>> Signed-off-by: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
> 
> I'll pick this up and apply it to my tree.
> 
Perhaps late but I hit this same issue, patch here fixes it and I wanted 
to confirm it.

Tested-by: Jarkko Nikula <jarkko.nikula@...ux.intel.com>