linux-kernel - Re: [PATCH] media: i2c: ov5648: Free V4L2 fwnode data on unbind

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Date:   Tue, 20 Sep 2022 16:07:43 +0200
From:   Paul Kocialkowski <paul.kocialkowski@...tlin.com>
To:     Rafael Mendonca <rafaelmendsr@...il.com>
Cc:     Mauro Carvalho Chehab <mchehab@...nel.org>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Mauro Carvalho Chehab <mchehab+huawei@...nel.org>,
        linux-media@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] media: i2c: ov5648: Free V4L2 fwnode data on unbind

Hi Rafael,

On Tue 20 Sep 22, 10:58, Rafael Mendonca wrote:
> On Tue, Sep 20, 2022 at 03:25:20PM +0200, Paul Kocialkowski wrote:
> > Hi Rafael,
> > 
> > On Sun 18 Sep 22, 23:32, Rafael Mendonca wrote:
> > > The V4L2 fwnode data structure doesn't get freed on unbind, which leads to
> > > a memleak.
> > 
> > Thanks for this patch, good catch!
> > 
> > I agree with Jacopo, you shouldn't add a newline before the call.
> 
> Thanks for the review, I'll send a v2. As the code for the ov5648 is
> similar to the ov8865, and in the 8865 there is this blank line before
> the v4l2_fwnode_endpoint_free() call, I thought it might be good to keep
> the same style here, that's why this empty line ended up appearing here.

Understood! I'd be tempted to make a cosmetic fix for 8865 but will probably
wait to group it with functional changes.

Cheers,

Paul

> > Feel free to send a v2 with that fixed and include my:
> > 
> > Reviewed-by: Paul Kocialkowski <paul.kocialkowski@...tlin.com>
> > 
> > Cheers,
> > 
> > Paul
> > 
> > > Fixes: e43ccb0a045f ("media: i2c: Add support for the OV5648 image sensor")
> > > Signed-off-by: Rafael Mendonca <rafaelmendsr@...il.com>
> > > ---
> > >  drivers/media/i2c/ov5648.c | 2 ++
> > >  1 file changed, 2 insertions(+)
> > > 
> > > diff --git a/drivers/media/i2c/ov5648.c b/drivers/media/i2c/ov5648.c
> > > index dfcd33e9ee13..95850f06112b 100644
> > > --- a/drivers/media/i2c/ov5648.c
> > > +++ b/drivers/media/i2c/ov5648.c
> > > @@ -2598,6 +2598,8 @@ static int ov5648_remove(struct i2c_client *client)
> > >  	mutex_destroy(&sensor->mutex);
> > >  	media_entity_cleanup(&subdev->entity);
> > >  
> > > +	v4l2_fwnode_endpoint_free(&sensor->endpoint);
> > > +
> > >  	return 0;
> > >  }
> > >  
> > > -- 
> > > 2.34.1
> > > 
> > 
> > -- 
> > Paul Kocialkowski, Bootlin
> > Embedded Linux and kernel engineering
> > https://bootlin.com
> 
> 

-- 
Paul Kocialkowski, Bootlin
Embedded Linux and kernel engineering
https://bootlin.com

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