vt8231: Fix unchecked return status

vt8231: Fix unchecked return status

Check the return status from device_create_file() and also use
the newer and cleaner sysfs creation functions.
Signed-off-by: NRoger Lucas <roger@planbit.co.uk>
Signed-off-by: NJean Delvare <khali@linux-fr.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

drivers/hwmon/vt8231.c

@@ -451,37 +451,6 @@ define_temperature_sysfs(4);
 define_temperature_sysfs(5);
 define_temperature_sysfs(6);
 
-#define CFG_INFO_TEMP(id)	{ &sensor_dev_attr_temp##id##_input.dev_attr, \
-				&sensor_dev_attr_temp##id##_max_hyst.dev_attr, \
-				&sensor_dev_attr_temp##id##_max.dev_attr }
-#define CFG_INFO_VOLT(id)	{ &sensor_dev_attr_in##id##_input.dev_attr, \
-				&sensor_dev_attr_in##id##_min.dev_attr, \
-				&sensor_dev_attr_in##id##_max.dev_attr }
-
-struct str_device_attr_table {
-	struct device_attribute *input;
-	struct device_attribute *min;
-	struct device_attribute *max;
-};
-
-static struct str_device_attr_table cfg_info_temp[] = {
-	{ &dev_attr_temp1_input, &dev_attr_temp1_max_hyst, &dev_attr_temp1_max },
-	CFG_INFO_TEMP(2),
-	CFG_INFO_TEMP(3),
-	CFG_INFO_TEMP(4),
-	CFG_INFO_TEMP(5),
-	CFG_INFO_TEMP(6)
-};
-
-static struct str_device_attr_table cfg_info_volt[] = {
-	CFG_INFO_VOLT(0),
-	CFG_INFO_VOLT(1),
-	CFG_INFO_VOLT(2),
-	CFG_INFO_VOLT(3),
-	CFG_INFO_VOLT(4),
-	{ &dev_attr_in5_input, &dev_attr_in5_min, &dev_attr_in5_max }
-};
-
 /* Fans */
 static ssize_t show_fan(struct device *dev, struct device_attribute *attr,
 		char *buf)
@@ -585,6 +554,107 @@ static ssize_t show_alarms(struct device *dev, struct device_attribute *attr,
 
 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
 
+static struct attribute *vt8231_attributes_temps[6][4] = {
+	{
+		&dev_attr_temp1_input.attr,
+		&dev_attr_temp1_max_hyst.attr,
+		&dev_attr_temp1_max.attr,
+		NULL
+	}, {
+		&sensor_dev_attr_temp2_input.dev_attr.attr,
+		&sensor_dev_attr_temp2_max_hyst.dev_attr.attr,
+		&sensor_dev_attr_temp2_max.dev_attr.attr,
+		NULL
+	}, {
+		&sensor_dev_attr_temp3_input.dev_attr.attr,
+		&sensor_dev_attr_temp3_max_hyst.dev_attr.attr,
+		&sensor_dev_attr_temp3_max.dev_attr.attr,
+		NULL
+	}, {
+		&sensor_dev_attr_temp4_input.dev_attr.attr,
+		&sensor_dev_attr_temp4_max_hyst.dev_attr.attr,
+		&sensor_dev_attr_temp4_max.dev_attr.attr,
+		NULL
+	}, {
+		&sensor_dev_attr_temp5_input.dev_attr.attr,
+		&sensor_dev_attr_temp5_max_hyst.dev_attr.attr,
+		&sensor_dev_attr_temp5_max.dev_attr.attr,
+		NULL
+	}, {
+		&sensor_dev_attr_temp6_input.dev_attr.attr,
+		&sensor_dev_attr_temp6_max_hyst.dev_attr.attr,
+		&sensor_dev_attr_temp6_max.dev_attr.attr,
+		NULL
+	}
+};
+
+static const struct attribute_group vt8231_group_temps[6] = {
+	{ .attrs = vt8231_attributes_temps[0] },
+	{ .attrs = vt8231_attributes_temps[1] },
+	{ .attrs = vt8231_attributes_temps[2] },
+	{ .attrs = vt8231_attributes_temps[3] },
+	{ .attrs = vt8231_attributes_temps[4] },
+	{ .attrs = vt8231_attributes_temps[5] },
+};
+
+static struct attribute *vt8231_attributes_volts[6][4] = {
+	{
+		&sensor_dev_attr_in0_input.dev_attr.attr,
+		&sensor_dev_attr_in0_min.dev_attr.attr,
+		&sensor_dev_attr_in0_max.dev_attr.attr,
+		NULL
+	}, {
+		&sensor_dev_attr_in1_input.dev_attr.attr,
+		&sensor_dev_attr_in1_min.dev_attr.attr,
+		&sensor_dev_attr_in1_max.dev_attr.attr,
+		NULL
+	}, {
+		&sensor_dev_attr_in2_input.dev_attr.attr,
+		&sensor_dev_attr_in2_min.dev_attr.attr,
+		&sensor_dev_attr_in2_max.dev_attr.attr,
+		NULL
+	}, {
+		&sensor_dev_attr_in3_input.dev_attr.attr,
+		&sensor_dev_attr_in3_min.dev_attr.attr,
+		&sensor_dev_attr_in3_max.dev_attr.attr,
+		NULL
+	}, {
+		&sensor_dev_attr_in4_input.dev_attr.attr,
+		&sensor_dev_attr_in4_min.dev_attr.attr,
+		&sensor_dev_attr_in4_max.dev_attr.attr,
+		NULL
+	}, {
+		&dev_attr_in5_input.attr,
+		&dev_attr_in5_min.attr,
+		&dev_attr_in5_max.attr,
+		NULL
+	}
+};
+
+static const struct attribute_group vt8231_group_volts[6] = {
+	{ .attrs = vt8231_attributes_volts[0] },
+	{ .attrs = vt8231_attributes_volts[1] },
+	{ .attrs = vt8231_attributes_volts[2] },
+	{ .attrs = vt8231_attributes_volts[3] },
+	{ .attrs = vt8231_attributes_volts[4] },
+	{ .attrs = vt8231_attributes_volts[5] },
+};
+
+static struct attribute *vt8231_attributes[] = {
+	&sensor_dev_attr_fan1_input.dev_attr.attr,
+	&sensor_dev_attr_fan2_input.dev_attr.attr,
+	&sensor_dev_attr_fan1_min.dev_attr.attr,
+	&sensor_dev_attr_fan2_min.dev_attr.attr,
+	&sensor_dev_attr_fan1_div.dev_attr.attr,
+	&sensor_dev_attr_fan2_div.dev_attr.attr,
+	&dev_attr_alarms.attr,
+	NULL
+};
+
+static const struct attribute_group vt8231_group = {
+	.attrs = vt8231_attributes,
+};
+
 static struct i2c_driver vt8231_driver = {
 	.driver = {
 		.owner	= THIS_MODULE,
@@ -671,43 +741,43 @@ int vt8231_detect(struct i2c_adapter *adapter)
 	vt8231_init_client(client);
 
 	/* Register sysfs hooks */
-	data->class_dev = hwmon_device_register(&client->dev);
-	if (IS_ERR(data->class_dev)) {
-		err = PTR_ERR(data->class_dev);
+	if ((err = sysfs_create_group(&client->dev.kobj, &vt8231_group)))
 		goto exit_detach;
-	}
 
 	/* Must update device information to find out the config field */
 	data->uch_config = vt8231_read_value(client, VT8231_REG_UCH_CONFIG);
 
-	for (i = 0; i < ARRAY_SIZE(cfg_info_temp); i++) {
+	for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++) {
 		if (ISTEMP(i, data->uch_config)) {
-			device_create_file(&client->dev,
-					   cfg_info_temp[i].input);
-			device_create_file(&client->dev, cfg_info_temp[i].max);
-			device_create_file(&client->dev, cfg_info_temp[i].min);
+			if ((err = sysfs_create_group(&client->dev.kobj,
+					&vt8231_group_temps[i])))
+				goto exit_remove_files;
 		}
 	}
 
-	for (i = 0; i < ARRAY_SIZE(cfg_info_volt); i++) {
+	for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++) {
 		if (ISVOLT(i, data->uch_config)) {
-			device_create_file(&client->dev,
-					   cfg_info_volt[i].input);
-			device_create_file(&client->dev, cfg_info_volt[i].max);
-			device_create_file(&client->dev, cfg_info_volt[i].min);
+			if ((err = sysfs_create_group(&client->dev.kobj,
+					&vt8231_group_volts[i])))
+				goto exit_remove_files;
 		}
 	}
 
-	device_create_file(&client->dev, &sensor_dev_attr_fan1_input.dev_attr);
-	device_create_file(&client->dev, &sensor_dev_attr_fan2_input.dev_attr);
-	device_create_file(&client->dev, &sensor_dev_attr_fan1_min.dev_attr);
-	device_create_file(&client->dev, &sensor_dev_attr_fan2_min.dev_attr);
-	device_create_file(&client->dev, &sensor_dev_attr_fan1_div.dev_attr);
-	device_create_file(&client->dev, &sensor_dev_attr_fan2_div.dev_attr);
-
-	device_create_file(&client->dev, &dev_attr_alarms);
+	data->class_dev = hwmon_device_register(&client->dev);
+	if (IS_ERR(data->class_dev)) {
+		err = PTR_ERR(data->class_dev);
+		goto exit_remove_files;
+	}
 	return 0;
 
+exit_remove_files:
+	for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++)
+		sysfs_remove_group(&client->dev.kobj, &vt8231_group_volts[i]);
+
+	for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++)
+		sysfs_remove_group(&client->dev.kobj, &vt8231_group_temps[i]);
+
+	sysfs_remove_group(&client->dev.kobj, &vt8231_group);
 exit_detach:
 	i2c_detach_client(client);
 exit_free:
@@ -720,10 +790,18 @@ int vt8231_detect(struct i2c_adapter *adapter)
 static int vt8231_detach_client(struct i2c_client *client)
 {
 	struct vt8231_data *data = i2c_get_clientdata(client);
-	int err;
+	int err, i;
 
 	hwmon_device_unregister(data->class_dev);
 
+	for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++)
+		sysfs_remove_group(&client->dev.kobj, &vt8231_group_volts[i]);
+
+	for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++)
+		sysfs_remove_group(&client->dev.kobj, &vt8231_group_temps[i]);
+
+	sysfs_remove_group(&client->dev.kobj, &vt8231_group);
+
 	if ((err = i2c_detach_client(client))) {
 		return err;
 	}