linux-kernel - Re: [Patch v4 4/8] media: i2c: ov2659: fix s

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Message-ID: <CA+V-a8t3h6+2a8QWKWNwROJRz546rGbUyXs5ez9wtH6AQ-euPA@mail.gmail.com>
Date:   Fri, 27 Sep 2019 21:33:28 +0100
From:   "Lad, Prabhakar" <prabhakar.csengg@...il.com>
To:     Benoit Parrot <bparrot@...com>
Cc:     Hans Verkuil <hverkuil@...all.nl>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        linux-media <linux-media@...r.kernel.org>,
        devicetree@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>
Subject: Re: [Patch v4 4/8] media: i2c: ov2659: fix s_stream return value

Hi Benoit,

thank you for the patch.

On Fri, Sep 27, 2019 at 7:46 PM Benoit Parrot <bparrot@...com> wrote:
>
> In ov2659_s_stream() return value for invoked function should be checked
> and propagated.
>
> Signed-off-by: Benoit Parrot <bparrot@...com>
> ---
>  drivers/media/i2c/ov2659.c | 11 +++++++----
>  1 file changed, 7 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/media/i2c/ov2659.c b/drivers/media/i2c/ov2659.c
> index f77320e8a60d..cd4625432264 100644
> --- a/drivers/media/i2c/ov2659.c
> +++ b/drivers/media/i2c/ov2659.c
> @@ -1187,10 +1187,13 @@ static int ov2659_s_stream(struct v4l2_subdev *sd, int on)
>                 goto unlock;
>         }
>
> -       ov2659_set_pixel_clock(ov2659);
> -       ov2659_set_frame_size(ov2659);
> -       ov2659_set_format(ov2659);
> -       ov2659_set_streaming(ov2659, 1);
> +       ret = ov2659_set_pixel_clock(ov2659);
> +       if (!ret)
> +               ret = ov2659_set_frame_size(ov2659);
> +       if (!ret)
> +               ret = ov2659_set_format(ov2659);
> +       if (!ret)
> +               ov2659_set_streaming(ov2659, 1);
>         ov2659->streaming = on;
>
the "ov2659->streaming = on;" should only be set if above calls
succeed, otherwise we might hit -EBUSY during set_fmt.

Cheers,
--Prabhakar Lad

>  unlock:
> --
> 2.17.1
>