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hwmon: (adt7410) handle errors from adt7410_update_device()

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Smatch complains that adt7410_update_device() can return error pointers.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Dan Carpenter 2012-08-15 10:49:43 +03:00 committed by Guenter Roeck
parent 983b97bed2
commit 37f9648b27
1 changed files with 7 additions and 2 deletions
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9
drivers/hwmon/adt7410.c
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@ -236,9 +236,14 @@ static ssize_t adt7410_show_t_hyst(struct device *dev,
char *buf) char *buf)
{ {
struct sensor_device_attribute *attr = to_sensor_dev_attr(da); struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
struct adt7410_data *data = adt7410_update_device(dev); struct adt7410_data *data;
int nr = attr->index; int nr = attr->index;
int hyst = (data->hyst & ADT7410_T_HYST_MASK) * 1000; int hyst;
data = adt7410_update_device(dev);
if (IS_ERR(data))
return PTR_ERR(data);
hyst = (data->hyst & ADT7410_T_HYST_MASK) * 1000;
/* /*
* hysteresis is stored as a 4 bit offset in the device, convert it * hysteresis is stored as a 4 bit offset in the device, convert it