linux-kernel - [095/105] [media] drivers/media/video/tlg2300/pd-video.c: Remove second mutex_unlock in pd_vidioc_s

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Message-Id: <20110412143558.120103212@clark.kroah.org>
Date:	Tue, 12 Apr 2011 07:35:24 -0700
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...nel.org
Cc:	stable-review@...nel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	Alexander Strakh <strakh@...ras.ru>,
	Huang Shijie <shijie8@...il.com>,
	Mauro Carvalho Chehab <mchehab@...hat.com>
Subject: [095/105] [media] drivers/media/video/tlg2300/pd-video.c: Remove second mutex_unlock in pd_vidioc_s_fmt

2.6.38-stable review patch.  If anyone has any objections, please let us know.

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

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

commit a07500ef690fcbec76e879ee2093d7ca69883825 upstream.

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>
Acked-by: Huang Shijie <shijie8@...il.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@...hat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

---
 drivers/media/video/tlg2300/pd-video.c |    4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

--- 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 poseid
 	}
 	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;


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