Input: psmouse - 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/mouse/psmouse-base.c

···
 			(void *) offsetof(struct psmouse, resync_time),
 			psmouse_show_int_attr, psmouse_set_int_attr);
 
-static struct attribute *psmouse_attributes[] = {
+static struct attribute *psmouse_dev_attrs[] = {
 	&psmouse_attr_protocol.dattr.attr,
 	&psmouse_attr_rate.dattr.attr,
 	&psmouse_attr_resolution.dattr.attr,
···
 	NULL
 };
 
-static const struct attribute_group psmouse_attribute_group = {
-	.attrs	= psmouse_attributes,
-};
+ATTRIBUTE_GROUPS(psmouse_dev);
 
 /*
  * psmouse_mutex protects all operations changing state of mouse
···
 	struct psmouse *psmouse = serio_get_drvdata(serio);
 	struct psmouse *parent = NULL;
 
-	sysfs_remove_group(&serio->dev.kobj, &psmouse_attribute_group);
-
 	mutex_lock(&psmouse_mutex);
 
 	psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
···
 	if (parent && parent->pt_activate)
 		parent->pt_activate(parent);
 
-	error = sysfs_create_group(&serio->dev.kobj, &psmouse_attribute_group);
-	if (error)
-		goto err_pt_deactivate;
-
 	/*
 	 * PS/2 devices having SMBus companions should stay disabled
 	 * on PS/2 side, in order to have SMBus part operable.
···
 	mutex_unlock(&psmouse_mutex);
 	return retval;
 
- err_pt_deactivate:
-	if (parent && parent->pt_deactivate)
-		parent->pt_deactivate(parent);
-	if (input_dev) {
-		input_unregister_device(input_dev);
-		input_dev = NULL; /* so we don't try to free it below */
-	}
  err_protocol_disconnect:
 	if (psmouse->disconnect)
 		psmouse->disconnect(psmouse);
···
 
 static struct serio_driver psmouse_drv = {
 	.driver		= {
-		.name	= "psmouse",
+		.name		= "psmouse",
+		.dev_groups	= psmouse_dev_groups,
 	},
 	.description	= DRIVER_DESC,
 	.id_table	= psmouse_serio_ids,