linux-kernel - [PATCH] hwmon: gigabyte_waterforce: Fix locking bug in waterforce_get

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Date: Mon, 22 Jan 2024 07:49:52 -0800
From: Harshit Mogalapalli <harshit.m.mogalapalli@...cle.com>
To: Aleksa Savic <savicaleksa83@...il.com>, Jean Delvare <jdelvare@...e.com>,
        Guenter Roeck <linux@...ck-us.net>, linux-hwmon@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc: dan.carpenter@...aro.org, kernel-janitors@...r.kernel.org,
        error27@...il.com, harshit.m.mogalapalli@...cle.com
Subject: [PATCH] hwmon: gigabyte_waterforce: Fix locking bug in waterforce_get_status()

Goto 'unlock_and_return' for unlocking before returning on the error
path.

Fixes: d5939a793693 ("hwmon: Add driver for Gigabyte AORUS Waterforce AIO coolers")
Signed-off-by: Harshit Mogalapalli <harshit.m.mogalapalli@...cle.com>
---
This is based on static analysis with smatch, only compile tested.
---
 drivers/hwmon/gigabyte_waterforce.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/hwmon/gigabyte_waterforce.c b/drivers/hwmon/gigabyte_waterforce.c
index 1799377fc2f1..7bccfe2eaa76 100644
--- a/drivers/hwmon/gigabyte_waterforce.c
+++ b/drivers/hwmon/gigabyte_waterforce.c
@@ -146,7 +146,7 @@ static int waterforce_get_status(struct waterforce_data *priv)
 	/* Send command for getting status */
 	ret = waterforce_write_expanded(priv, get_status_cmd, GET_STATUS_CMD_LENGTH);
 	if (ret < 0)
-		return ret;
+		goto unlock_and_return;
 
 	ret = wait_for_completion_interruptible_timeout(&priv->status_report_received,
 							msecs_to_jiffies(STATUS_VALIDITY));
-- 
2.39.3