[SCSI] raid class: handle component-add errors

	kfree(rc);

}

void raid_component_add(struct raid_template *r,struct device *raid_dev,

int raid_component_add(struct raid_template *r,struct device *raid_dev,

		       struct device *component_dev)

{

	struct class_device *cdev =

						      raid_dev);

	struct raid_component *rc;

	struct raid_data *rd = class_get_devdata(cdev);

	int err;

	rc = kzalloc(sizeof(*rc), GFP_KERNEL);

	if (!rc)

		return;

		return -ENOMEM;

	INIT_LIST_HEAD(&rc->node);

	class_device_initialize(&rc->cdev);

	list_add_tail(&rc->node, &rd->component_list);

	rc->cdev.parent = cdev;

	rc->cdev.class = &raid_class.class;

	class_device_add(&rc->cdev);

	err = class_device_add(&rc->cdev);

	if (err)

		goto err_out;

	return 0;

err_out:

	list_del(&rc->node);

	rd->component_count--;

	put_device(component_dev);

	kfree(rc);

	return err;

}

EXPORT_SYMBOL(raid_component_add);

struct raid_template *raid_class_attach(struct raid_function_template *);

void raid_class_release(struct raid_template *);

void raid_component_add(struct raid_template *, struct device *,

int __must_check raid_component_add(struct raid_template *, struct device *,

				    struct device *);