linux-kernel - Re: [PATCH next 1/2] media: mtk-mdp: fix video_device

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Message-ID: <1478522845.4269.3.camel@mtksdaap41>
Date:   Mon, 7 Nov 2016 20:47:25 +0800
From:   Minghsiu Tsai <minghsiu.tsai@...iatek.com>
To:     Hans Verkuil <hverkuil@...all.nl>
CC:     Vincent Stehlé <vincent.stehle@...oste.net>,
        <linux-media@...r.kernel.org>,
        <linux-mediatek@...ts.infradead.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>,
        "Hans Verkuil" <hans.verkuil@...co.com>,
        Mauro Carvalho Chehab <mchehab@...pensource.com>
Subject: Re: [PATCH next 1/2] media: mtk-mdp: fix video_device_release
 argument

On Thu, 2016-11-03 at 13:47 +0100, Hans Verkuil wrote:
> Hi Vincent,
> 
> On 28/10/16 09:52, Vincent Stehlé wrote:
> > On Thu, Oct 27, 2016 at 10:23:24PM +0200, Vincent Stehlé wrote:
> >> video_device_release() takes a pointer to struct video_device as argument.
> >> Fix two call sites where the address of the pointer is passed instead.
> >
> > Sorry, I messed up: please ignore that "fix". The 0day robot made me
> > realize this is indeed not a proper fix.
> >
> > The issue remains, though: we cannot call video_device_release() on the
> > vdev structure member, as this will in turn call kfree(). Most probably,
> > vdev needs to be dynamically allocated, or the call to
> > video_device_release() dropped completely.
> 
> I prefer that vdev is dynamically allocated. There are known problems with
> embedded video_device structs, so allocating it is preferred.
> 
> Minghsiu, can you do that?
> 

Hi Hans,

I just send the patch for this.
https://patchwork.kernel.org/patch/9415007/


> Regards,
> 
> 	Hans
> 
> >
> > Sorry for the bad patch.
> >
> > Best regards,
> >
> > Vincent.
> > --
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> >