linux-kernel - [PATCH 1/1] HWMON: amc6821, fix lock imbalance

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Message-Id: <1263634081-6644-1-git-send-email-jslaby@suse.cz>
Date:	Sat, 16 Jan 2010 10:28:01 +0100
From:	Jiri Slaby <jslaby@...e.cz>
To:	akpm@...ux-foundation.org
Cc:	linux-kernel@...r.kernel.org, jirislaby@...il.com,
	Tomaz Mertelj <tomaz.mertelj@...st.arnes.si>,
	Jean Delvare <khali@...ux-fr.org>
Subject: [PATCH 1/1] HWMON: amc6821, fix lock imbalance

Stanse found a lock imbalance in set_fan1_div. data->update_lock
is unlocked twice on a fail path.

Triggerable by writing value other than 2 and 4 to fan1_div.

Signed-off-by: Jiri Slaby <jslaby@...e.cz>
Cc: Tomaz Mertelj <tomaz.mertelj@...st.arnes.si>
Cc: Jean Delvare <khali@...ux-fr.org>
Cc: Andrew Morton <akpm@...ux-foundation.org>
---
 drivers/hwmon/amc6821.c |    1 -
 1 files changed, 0 insertions(+), 1 deletions(-)

diff --git a/drivers/hwmon/amc6821.c b/drivers/hwmon/amc6821.c
index 1c89d92..fa9708c 100644
--- a/drivers/hwmon/amc6821.c
+++ b/drivers/hwmon/amc6821.c
@@ -686,7 +686,6 @@ static ssize_t set_fan1_div(
 		data->fan1_div = 4;
 		break;
 	default:
-		mutex_unlock(&data->update_lock);
 		count = -EINVAL;
 		goto EXIT;
 	}
-- 
1.6.5.7

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