hwmon: (adm1029) Use mask for fan_div value
This is my patch for testing correct values of fan div in adm1029 and
prevent a division by 0 for some (unlikely) register values.
Signed-off-by: Corentin Labbe <corentin.labbe@geomatys.fr>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
diff --git a/drivers/hwmon/adm1029.c b/drivers/hwmon/adm1029.c
index ba84ca5..3671815 100644
--- a/drivers/hwmon/adm1029.c
+++ b/drivers/hwmon/adm1029.c
@@ -179,7 +179,8 @@
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct adm1029_data *data = adm1029_update_device(dev);
u16 val;
- if (data->fan[attr->index] == 0 || data->fan_div[attr->index] == 0
+ if (data->fan[attr->index] == 0
+ || (data->fan_div[attr->index] & 0xC0) == 0
|| data->fan[attr->index] == 255) {
return sprintf(buf, "0\n");
}
@@ -194,7 +195,7 @@
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct adm1029_data *data = adm1029_update_device(dev);
- if (data->fan_div[attr->index] == 0)
+ if ((data->fan_div[attr->index] & 0xC0) == 0)
return sprintf(buf, "0\n");
return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[attr->index]));
}