hwmon: (adt7410) handle errors from adt7410_update_device()

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>

1 files changed, 7 insertions, 2 deletions

diff --git a/drivers/hwmon/adt7410.c b/drivers/hwmon/adt7410.c
index f8606dff3d1c..030c8d7c33a5 100644
--- a/drivers/hwmon/adt7410.c
+++ b/drivers/hwmon/adt7410.c
@@ -236,9 +236,14 @@ static ssize_t adt7410_show_t_hyst(struct device *dev,
                                    char *buf)
 {
         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 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