+++ /dev/null
---- a/drivers/pci/pci.c
-+++ b/drivers/pci/pci.c
-@@ -4772,7 +4772,10 @@ int pci_get_new_domain_nr(void)
- void pci_bus_assign_domain_nr(struct pci_bus *bus, struct device *parent)
- {
- static int use_dt_domains = -1;
-- int domain = of_get_pci_domain_nr(parent->of_node);
-+ int domain = -1;
-+
-+ if (parent && parent->of_node)
-+ domain = of_get_pci_domain_nr(parent->of_node);
-
- /*
- * Check DT domain and use_dt_domains values.