if (rpaphp_add_slot(dn)) { printk(KERN_ERR "%s: unable to add hotplug slot %s\n", __FUNCTION__, drc_name); return -EIO; }
static int dlpar_add_phb(struct device_node *dn){	struct pci_controller *phb;	phb = init_phb_dynamic(dn);	if (!phb)		return -EINVAL;	return 0;}