media: uvcvideo: Do not return positive errors in uvc_query_ctrl()

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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.

This will avoid confusing the caller (and ultimately userspace) that
doesn't expect a positive or zero value.

Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Suggested-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Ricardo Ribalda <ribalda@chromium.org>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

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Ricardo Ribalda 2023-01-03 15:36:22 +01:00 • committed by Laurent Pinchart

parent 44cdba4130

commit a763b9fb58

1 changed files with 1 additions and 1 deletions

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drivers/media/usb/uvc/uvc_video.c

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