hwmon: (adm1029) Ensure the fan_div cache is updated in set_fan_div

Writing to fanX_div does not clear the cache. As a result, reading from fanX_div may return the old value for up to two seconds after writing a new value. This patch ensures the fan_div cache is updated in set_fan_div(). Reported-by: Guenter Roeck <[email protected]> Signed-off-by: Axel Lin <[email protected]> Cc: [email protected] Signed-off-by: Guenter Roeck <[email protected]>
cjhuang · Jul 3, 2014 · 1035a9e · 1035a9e
1 parent df86754
commit 1035a9e
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/drivers/hwmon/adm1029.c b/drivers/hwmon/adm1029.c
@@ -232,6 +232,9 @@ static ssize_t set_fan_div(struct device *dev,
 	/* Update the value */
 	reg = (reg & 0x3F) | (val << 6);
 
+	/* Update the cache */
+	data->fan_div[attr->index] = reg;
+
 	/* Write value */
 	i2c_smbus_write_byte_data(client,
 				  ADM1029_REG_FAN_DIV[attr->index], reg);