hwmon: (lm80) Fix missing unlock on error in set_fan_div()

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>

diff --git a/drivers/hwmon/lm80.c b/drivers/hwmon/lm80.c
index 0e30fa00204cdd65ad927ee38d4bb00e61b49f58..f9b8e3e23a8e8d22293b4e22ee27dc3563f13fa4 100644 (file)
--- 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);