Hi Ricardo,
Thank you for the patch.
On Fri, Dec 02, 2022 at 06:21:38PM +0100, Ricardo Ribalda wrote:
> If the returned size of the query does not match the expected size or it
> is zero, return -EPIPE instead of 0 or a positive value.
The commit message should explain why: this will avoid confusing the
caller (and ultimately userspace) that doesn't expect a positive or zero
value.
> Suggested-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> Signed-off-by: Ricardo Ribalda <ribalda@chromium.org>
I'll update the commit message locally.
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> ---
> 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 497073a50194..902f2817a743 100644
> --- a/drivers/media/usb/uvc/uvc_video.c
> +++ b/drivers/media/usb/uvc/uvc_video.c
> @@ -83,7 +83,7 @@ int uvc_query_ctrl(struct uvc_device *dev, u8 query, u8 unit,
> dev_err(&dev->udev->dev,
> "Failed to query (%s) UVC control %u on unit %u: %d (exp. %u).\n",
> uvc_query_name(query), cs, unit, ret, size);
> - return ret;
> + return ret < 0 ? ret : -EPIPE;
> }
>
> /* reuse data[0] to request the error code. */
>
--
Regards,
Laurent Pinchart