1 files changed, 12 insertions, 6 deletions

diff --git a/drivers/hwmon/vt8231.c b/drivers/hwmon/vt8231.c
index 3bf27c21845b..5757a0979f3f 100644
--- a/drivers/hwmon/vt8231.c
+++ b/drivers/hwmon/vt8231.c
@@ -138,7 +138,12 @@ static inline u8 FAN_TO_REG(long rpm, int div)
 	return clamp_val(1310720 / (rpm * div), 1, 255);
 }
 
-#define FAN_FROM_REG(val, div) ((val) == 0 ? 0 : 1310720 / ((val) * (div)))
+static int fan_from_reg(int val, int div)
+{
+	if (val == 0)
+		return 0;
+	return 1310720 / (val * div);
+}
 
 struct vt8231_data {
 	unsigned short addr;
@@ -561,7 +566,7 @@ static ssize_t fan_show(struct device *dev, struct device_attribute *attr,
 	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 	int nr = sensor_attr->index;
 	struct vt8231_data *data = vt8231_update_device(dev);
-	return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr],
+	return sprintf(buf, "%d\n", fan_from_reg(data->fan[nr],
 				DIV_FROM_REG(data->fan_div[nr])));
 }
 
@@ -571,7 +576,7 @@ static ssize_t fan_min_show(struct device *dev, struct device_attribute *attr,
 	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 	int nr = sensor_attr->index;
 	struct vt8231_data *data = vt8231_update_device(dev);
-	return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr],
+	return sprintf(buf, "%d\n", fan_from_reg(data->fan_min[nr],
 			DIV_FROM_REG(data->fan_div[nr])));
 }
 
@@ -613,9 +618,8 @@ static ssize_t fan_div_store(struct device *dev,
 	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 	unsigned long val;
 	int nr = sensor_attr->index;
-	int old = vt8231_read_value(data, VT8231_REG_FANDIV);
-	long min = FAN_FROM_REG(data->fan_min[nr],
-				 DIV_FROM_REG(data->fan_div[nr]));
+	int old;
+	long min;
 	int err;
 
 	err = kstrtoul(buf, 10, &val);
@@ -623,6 +627,8 @@ static ssize_t fan_div_store(struct device *dev,
 		return err;
 
 	mutex_lock(&data->update_lock);
+	old = vt8231_read_value(data, VT8231_REG_FANDIV);
+	min = fan_from_reg(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr]));
 	switch (val) {
 	case 1:
 		data->fan_div[nr] = 0;