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Subject[PATCH 4.20 28/32] hwmon: (lm80) Fix missing unlock on error in set_fan_div()
Date
4.20-stable review patch.  If anyone has any objections, please let me know.

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

[ Upstream commit 07bd14ccc3049f9c0147a91a4227a571f981601a ]

Add the missing unlock before return from function set_fan_div()
in the error handling case.

Fixes: c9c63915519b ("hwmon: (lm80) fix a missing check of the status of SMBus read")
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/hwmon/lm80.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/hwmon/lm80.c b/drivers/hwmon/lm80.c
index 0e30fa00204cd..f9b8e3e23a8e8 100644
--- a/drivers/hwmon/lm80.c
+++ b/drivers/hwmon/lm80.c
@@ -393,8 +393,10 @@ static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
}

rv = lm80_read_value(client, LM80_REG_FANDIV);
- if (rv < 0)
+ if (rv < 0) {
+ mutex_unlock(&data->update_lock);
return rv;
+ }
reg = (rv & ~(3 << (2 * (nr + 1))))
| (data->fan_div[nr] << (2 * (nr + 1)));
lm80_write_value(client, LM80_REG_FANDIV, reg);
--
2.19.1


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