linux-kernel - Re: [PATCH 03/10] media: uvcvideo: Return -EIO for control errors

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Message-ID: <CANiDSCtw2q7UxMoZSMeE545WCxMs-WSHR2xbjG+xWL9CaBE3Aw@mail.gmail.com>
Date:   Thu, 11 Mar 2021 15:08:22 +0100
From:   Ricardo Ribalda <ribalda@...omium.org>
To:     Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Tomasz Figa <tfiga@...omium.org>,
        Linux Media Mailing List <linux-media@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Sergey Senozhatsky <senozhatsky@...omium.org>,
        Hans Verkuil <hverkuil-cisco@...all.nl>
Subject: Re: [PATCH 03/10] media: uvcvideo: Return -EIO for control errors

As discussed in the IRC with Hans

We need to specify in the commit message that this is most likely due
to hw error.

On Thu, Mar 11, 2021 at 1:20 PM Ricardo Ribalda <ribalda@...omium.org> wrote:
>
> Fixes v4l2-compliance:
>
> Control ioctls (Input 0):
>                 fail: v4l2-test-controls.cpp(448): s_ctrl returned an error (22)
>         test VIDIOC_G/S_CTRL: FAIL
>                 fail: v4l2-test-controls.cpp(698): s_ext_ctrls returned an error (22)
>         test VIDIOC_G/S/TRY_EXT_CTRLS: FAIL
>
> Signed-off-by: Ricardo Ribalda <ribalda@...omium.org>
> ---
>  drivers/media/usb/uvc/uvc_video.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/media/usb/uvc/uvc_video.c b/drivers/media/usb/uvc/uvc_video.c
> index f2f565281e63..5442e9be1c55 100644
> --- a/drivers/media/usb/uvc/uvc_video.c
> +++ b/drivers/media/usb/uvc/uvc_video.c
> @@ -113,7 +113,7 @@ int uvc_query_ctrl(struct uvc_device *dev, u8 query, u8 unit,
>         case 6: /* Invalid control */
>         case 7: /* Invalid Request */
>         case 8: /* Invalid value within range */
> -               return -EINVAL;
> +               return -EIO;
>         default: /* reserved or unknown */
>                 break;
>         }
> --
> 2.31.0.rc2.261.g7f71774620-goog
>


-- 
Ricardo Ribalda