From: Corentin Labbe <corentin.labbe@geomatys.fr>
Date: Fri, 17 Oct 2008 15:51:20 +0000 (+0200)
Subject: hwmon: (adm1029) Use mask for fan_div value
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=366716e6aabfb6f7c65525cc1637e035bfaf422d;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

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 ba84ca5923f9..36718150b475 100644
--- a/drivers/hwmon/adm1029.c
+++ b/drivers/hwmon/adm1029.c
@@ -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]));
 }