linux-kernel - Re: [PATCH] media: i2c: hi846: Fix V4L2_SUBDEV_FORMAT_TRY get

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Date: Sat, 11 May 2024 09:47:47 +0200
From: Ricardo Ribalda <ribalda@...omium.org>
To: Laurent Pinchart <laurent.pinchart@...asonboard.com>
Cc: Sakari Ailus <sakari.ailus@...ux.intel.com>, Martin Kepplinger <martink@...teo.de>, 
	Mauro Carvalho Chehab <mchehab@...nel.org>, Pavel Machek <pavel@....cz>, 
	Mauro Carvalho Chehab <mchehab+huawei@...nel.org>, linux-media@...r.kernel.org, 
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] media: i2c: hi846: Fix V4L2_SUBDEV_FORMAT_TRY get_selection()

Hi Laurent

On Thu, 9 May 2024 at 21:39, Laurent Pinchart
<laurent.pinchart@...asonboard.com> wrote:
>
> Hi Ricardo,
>
> Thank you for the patch.
>
> On Thu, May 09, 2024 at 05:05:55PM +0000, Ricardo Ribalda wrote:
> > The current code does not return anything to the user.
> >
> > Although the code looks a bit dangerous (using a pointer without
> > checking if it is valid), it should be fine. The code validates that
>
> I think you meant s/code/core/

Yes, sorry, fatty fingers :)

If you are planning to send a v5 of this
https://patchwork.linuxtv.org/project/linux-media/patch/20240508214045.24716-4-laurent.pinchart+renesas@ideasonboard.com/

Maybe you could include this patch there?

I found the issue when the CI tested your series (eventhough it is not
caused by your series)

Regards!

>
> > sel->pad has a valid value.
> >
> > Fix the following smatch error:
> > drivers/media/i2c/hi846.c:1854 hi846_get_selection() warn: statement has no effect 31
> >
> > Fixes: e8c0882685f9 ("media: i2c: add driver for the SK Hynix Hi-846 8M pixel camera")
> > Signed-off-by: Ricardo Ribalda <ribalda@...omium.org>
>
> Reviewed-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>
>
> > ---
> > While running media-ci on the last patches there was a new sparse
> > warning:
> > https://gitlab.freedesktop.org/linux-media/users/patchwork/-/jobs/58524338/artifacts/external_file/junit/test-smatch.log.txt
> > ---
> >  drivers/media/i2c/hi846.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/drivers/media/i2c/hi846.c b/drivers/media/i2c/hi846.c
> > index 9c565ec033d4..52d9ca68a86c 100644
> > --- a/drivers/media/i2c/hi846.c
> > +++ b/drivers/media/i2c/hi846.c
> > @@ -1851,7 +1851,7 @@ static int hi846_get_selection(struct v4l2_subdev *sd,
> >               mutex_lock(&hi846->mutex);
> >               switch (sel->which) {
> >               case V4L2_SUBDEV_FORMAT_TRY:
> > -                     v4l2_subdev_state_get_crop(sd_state, sel->pad);
> > +                     sel->r = *v4l2_subdev_state_get_crop(sd_state, sel->pad);
> >                       break;
> >               case V4L2_SUBDEV_FORMAT_ACTIVE:
> >                       sel->r = hi846->cur_mode->crop;
> >
> > ---
> > base-commit: 48259b90973718d2277db27b5e510f0fe957eaa0
> > change-id: 20240509-fix-hi846-c3d77768622e
>
> --
> Regards,
>
> Laurent Pinchart



-- 
Ricardo Ribalda