Input: aiptek - switch to using dev_groups for driver-specific attributes

The driver core now has the ability to handle the creation and removal
of device-specific sysfs files, let's use it instead of registering and
unregistering attributes by hand.

Reviewed-by: Greg Kroah-Hartman <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Dmitry Torokhov <[e-mail]>

drivers/input/tablet/aiptek.c

···
 
 static DEVICE_ATTR(firmware_code, S_IRUGO, show_firmwareCode, NULL);
 
-static struct attribute *aiptek_attributes[] = {
+static struct attribute *aiptek_dev_attrs[] = {
 	&dev_attr_size.attr,
 	&dev_attr_pointer_mode.attr,
 	&dev_attr_coordinate_mode.attr,
···
 	NULL
 };
 
-static const struct attribute_group aiptek_attribute_group = {
-	.attrs	= aiptek_attributes,
-};
+ATTRIBUTE_GROUPS(aiptek_dev);
 
 /***********************************************************************
  * This routine is called when a tablet has been identified. It basically
···
 	 */
 	usb_set_intfdata(intf, aiptek);
 
-	/* Set up the sysfs files
-	 */
-	err = sysfs_create_group(&intf->dev.kobj, &aiptek_attribute_group);
-	if (err) {
-		dev_warn(&intf->dev, "cannot create sysfs group err: %d\n",
-			 err);
-		goto fail3;
-        }
-
 	/* Register the tablet as an Input Device
 	 */
 	err = input_register_device(aiptek->inputdev);
 	if (err) {
 		dev_warn(&intf->dev,
 			 "input_register_device returned err: %d\n", err);
-		goto fail4;
+		goto fail3;
         }
 	return 0;
 
- fail4:	sysfs_remove_group(&intf->dev.kobj, &aiptek_attribute_group);
  fail3: usb_free_urb(aiptek->urb);
  fail2:	usb_free_coherent(usbdev, AIPTEK_PACKET_LENGTH, aiptek->data,
 			  aiptek->data_dma);
···
 		 */
 		usb_kill_urb(aiptek->urb);
 		input_unregister_device(aiptek->inputdev);
-		sysfs_remove_group(&intf->dev.kobj, &aiptek_attribute_group);
 		usb_free_urb(aiptek->urb);
 		usb_free_coherent(interface_to_usbdev(intf),
 				  AIPTEK_PACKET_LENGTH,
···
 	.probe = aiptek_probe,
 	.disconnect = aiptek_disconnect,
 	.id_table = aiptek_ids,
+	.dev_groups = aiptek_dev_groups,
 };
 
 module_usb_driver(aiptek_driver);