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

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Date:   Fri, 18 Feb 2022 08:42:51 +0900
From:   William Breathitt Gray <vilhelm.gray@...il.com>
To:     Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
Cc:     Jarkko Nikula <jarkko.nikula@...ux.intel.com>,
        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

On Thu, Feb 17, 2022 at 05:03:08PM +0100, Uwe Kleine-König wrote:
> On Thu, Feb 17, 2022 at 04:48:50PM +0200, Jarkko Nikula wrote:
> > 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>
> 
> I wonder if this patch is scheduled for 5.17. Currently it's not even in
> next ... :-\
> 
> Best regards
> Uwe

Hi Uwe,

I've got it in my tree. I'm sending a pull request for the Counter
patches for 5.17 next week, so they should all be merged after that.

Sincerely,

William Breathitt Gray

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