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

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[ Upstream commit 07bd14ccc3 ]

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

Fixes: c9c6391551 ("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>
This commit is contained in:
Wei Yongjun 2018-12-26 11:28:24 +00:00 committed by Greg Kroah-Hartman
parent be62fb6c28
commit 986ac4c8f1
1 changed files with 3 additions and 1 deletions
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4
drivers/hwmon/lm80.c
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@ -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);