linux-kernel - [PATCH 1/1] drivers/media/video/tlg2300/pd-video.c: Remove second mutex_unlock in pd_vidioc_s

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Date:	Wed, 26 Jan 2011 00:00:13 +0300
From:	Alexander Strakh <cromlehg@...il.com>
To:	shijie8@...il.com
Cc:	kangyong@...egent.com, xbzhang@...egent.com, mchehab@...radead.org,
	linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
	Alexander Strakh <cromlehg@...il.com>,
	Alexander Strakh <strakh@...ras.ru>
Subject: [PATCH 1/1] drivers/media/video/tlg2300/pd-video.c: Remove second mutex_unlock in pd_vidioc_s_fmt

From: Alexander Strakh <cromlehg@...il.com>

Error path in file drivers/media/video/tlg2300/pd-video.c:
1. First mutex_unlock on &pd->lock in line 767 (in function that
   called from line 805) 
2. Second in line  806

 805        pd_vidioc_s_fmt(pd, &f->fmt.pix);
 806        mutex_unlock(&pd->lock);

Found by Linux Device Drivers Verification Project

Signed-off-by: Alexander Strakh <strakh@...ras.ru>
---
 drivers/media/video/tlg2300/pd-video.c |    4 +---
 1 files changed, 1 insertions(+), 3 deletions(-)

diff --git a/drivers/media/video/tlg2300/pd-video.c b/drivers/media/video/tlg2300/pd-video.c
index df33a1d..a794ae6 100644
--- a/drivers/media/video/tlg2300/pd-video.c
+++ b/drivers/media/video/tlg2300/pd-video.c
@@ -764,10 +764,8 @@ static int pd_vidioc_s_fmt(struct poseidon *pd, struct v4l2_pix_format *pix)
 	}
 	ret |= send_set_req(pd, VIDEO_ROSOLU_SEL,
 				vid_resol, &cmd_status);
-	if (ret || cmd_status) {
-		mutex_unlock(&pd->lock);
+	if (ret || cmd_status)
 		return -EBUSY;
-	}
 
 	pix_def->pixelformat = pix->pixelformat; /* save it */
 	pix->height = (context->tvnormid & V4L2_STD_525_60) ?  480 : 576;
-- 
1.7.1

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