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.
Suggested-by: Laurent Pinchart <[email protected]>
Signed-off-by: Ricardo Ribalda <[email protected]>
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. */
--
b4 0.11.0-dev-d93f8