hwmon: (w83627ehf) read fan_div values during probe

This patch forces the driver to read the fan divider values during early init.
Otherwise, a call to store_fan_min() could access uninitialized variables.
Signed-off-by: Mark M. Hoffman <mhoffman@lightlink.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>

drivers/hwmon/w83627ehf.c

@@ -421,17 +421,10 @@ static void w83627ehf_write_fan_div(struct w83627ehf_data *data, int nr)
 	}
 }
 
-static struct w83627ehf_data *w83627ehf_update_device(struct device *dev)
+static void w83627ehf_update_fan_div(struct w83627ehf_data *data)
 {
-	struct w83627ehf_data *data = dev_get_drvdata(dev);
-	int pwmcfg = 0, tolerance = 0; /* shut up the compiler */
 	int i;
 
-	mutex_lock(&data->update_lock);
-
-	if (time_after(jiffies, data->last_updated + HZ + HZ/2)
-	 || !data->valid) {
-		/* Fan clock dividers */
 	i = w83627ehf_read_value(data, W83627EHF_REG_FANDIV1);
 	data->fan_div[0] = (i >> 4) & 0x03;
 	data->fan_div[1] = (i >> 6) & 0x03;
@@ -451,6 +444,20 @@ static struct w83627ehf_data *w83627ehf_update_device(struct device *dev)
 		i = w83627ehf_read_value(data, W83627EHF_REG_SMI_OVT);
 		data->fan_div[3] |= (i >> 5) & 0x04;
 	}
+}
+
+static struct w83627ehf_data *w83627ehf_update_device(struct device *dev)
+{
+	struct w83627ehf_data *data = dev_get_drvdata(dev);
+	int pwmcfg = 0, tolerance = 0; /* shut up the compiler */
+	int i;
+
+	mutex_lock(&data->update_lock);
+
+	if (time_after(jiffies, data->last_updated + HZ + HZ/2)
+	 || !data->valid) {
+		/* Fan clock dividers */
+		w83627ehf_update_fan_div(data);
 
 		/* Measured voltages and limits */
 		for (i = 0; i < data->in_num; i++) {
@@ -1312,6 +1319,9 @@ static int __devinit w83627ehf_probe(struct platform_device *pdev)
 	if (!(i & (1 << 1)) && (!fan5pin))
 		data->has_fan |= (1 << 4);
 
+	/* Read fan clock dividers immediately */
+	w83627ehf_update_fan_div(data);
+
 	/* Register sysfs hooks */
   	for (i = 0; i < ARRAY_SIZE(sda_sf3_arrays); i++)
 		if ((err = device_create_file(dev,