linux-kernel - [PATCH 3.16 038/134] [media] uvcvideo: Fix empty packet statistic

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Date:   Fri, 18 Aug 2017 14:13:20 +0100
From:   Ben Hutchings <ben@...adent.org.uk>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:     akpm@...ux-foundation.org,
        "Kieran Bingham" <kieran.bingham@...asonboard.com>,
        "Laurent Pinchart" <laurent.pinchart@...asonboard.com>,
        "Mauro Carvalho Chehab" <mchehab@...pensource.com>
Subject: [PATCH 3.16 038/134] [media] uvcvideo: Fix empty packet statistic

3.16.47-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Kieran Bingham <kieran.bingham@...asonboard.com>

commit 360a3a90c6261fe24a959ff38f8f6c3a8468f23c upstream.

The frame counters are inadvertently counting packets with content as
empty.

Fix it by correcting the logic expression

Fixes: 7bc5edb00bbd [media] uvcvideo: Extract video stream statistics

Signed-off-by: Kieran Bingham <kieran.bingham@...asonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@...pensource.com>
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 drivers/media/usb/uvc/uvc_video.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/media/usb/uvc/uvc_video.c
+++ b/drivers/media/usb/uvc/uvc_video.c
@@ -810,7 +810,7 @@ static void uvc_video_stats_decode(struc
 
 	/* Update the packets counters. */
 	stream->stats.frame.nb_packets++;
-	if (len > header_size)
+	if (len <= header_size)
 		stream->stats.frame.nb_empty++;
 
 	if (data[1] & UVC_STREAM_ERR)