b->sysdata = sysdata;
b->ops = ops;
b->number = b->busn_res.start = bus;
- pci_bus_assign_domain_nr(b, parent);
+#ifdef CONFIG_PCI_DOMAINS_GENERIC
+ b->domain_nr = pci_bus_find_domain_nr(b, parent);
+#endif
b2 = pci_find_bus(pci_domain_nr(b), bus);
if (b2) {
/* If we already got to this bus through a different bridge, ignore it */