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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>
This commit is contained in:
Corentin Labbe 2008-10-17 17:51:20 +02:00 committed by Jean Delvare
parent d664a4809e
commit 366716e6aa
1 changed files with 3 additions and 2 deletions
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5
drivers/hwmon/adm1029.c
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@ -179,7 +179,8 @@ show_fan(struct device *dev, struct device_attribute *devattr, char *buf)
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 @@ show_fan_div(struct device *dev, struct device_attribute *devattr, char *buf)
{
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]));
}