1 --- a/drivers/pci/pci.c
2 +++ b/drivers/pci/pci.c
3 @@ -4772,7 +4772,10 @@ int pci_get_new_domain_nr(void)
4 void pci_bus_assign_domain_nr(struct pci_bus *bus, struct device *parent)
6 static int use_dt_domains = -1;
7 - int domain = of_get_pci_domain_nr(parent->of_node);
10 + if (parent && parent->of_node)
11 + domain = of_get_pci_domain_nr(parent->of_node);
14 * Check DT domain and use_dt_domains values.