linux-kernel - [PATCH 1/4] V4L: cx231xx, fix lock imbalance

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Date:	Wed, 27 Oct 2010 13:47:37 +0200
From:	Jiri Slaby <jslaby@...e.cz>
To:	mchehab@...hat.com
Cc:	linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
	jirislaby@...il.com, Devin Heitmueller <dheitmueller@...ppauge.com>
Subject: [PATCH 1/4] V4L: cx231xx, fix lock imbalance

Stanse found that there is mutex_lock in a fail path of
cx231xx_i2c_xfer instead of mutex_unlock (i.e. double lock + leaving a
function in locked state). So fix that.

Signed-off-by: Jiri Slaby <jslaby@...e.cz>
Cc: Mauro Carvalho Chehab <mchehab@...hat.com>
Cc: Devin Heitmueller <dheitmueller@...ppauge.com>
---
 drivers/media/video/cx231xx/cx231xx-i2c.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/media/video/cx231xx/cx231xx-i2c.c b/drivers/media/video/cx231xx/cx231xx-i2c.c
index cce74e5..8356706 100644
--- a/drivers/media/video/cx231xx/cx231xx-i2c.c
+++ b/drivers/media/video/cx231xx/cx231xx-i2c.c
@@ -372,7 +372,7 @@ static int cx231xx_i2c_xfer(struct i2c_adapter *i2c_adap,
 			rc = cx231xx_i2c_check_for_device(i2c_adap, &msgs[i]);
 			if (rc < 0) {
 				dprintk2(2, " no device\n");
-				mutex_lock(&dev->i2c_lock);
+				mutex_unlock(&dev->i2c_lock);
 				return rc;
 			}
 
-- 
1.7.3.1


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