diff --git a/drivers/hwmon/amc6821.c b/drivers/hwmon/amc6821.c
index 1c89d922d6199ad3215a6806eedc647bdc9bf415..fa9708c2d723d27b52eece60e6a2c525ee65246c 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;
 	}