pci_device_from_OF_node
extern int pci_device_from_OF_node(struct device_node *node,
EXPORT_SYMBOL(pci_device_from_OF_node);
if (pci_device_from_OF_node(pcix_node, &px_bus, &px_devfn) != 0) {
if (pci_device_from_OF_node(node, &pbus, &pid) == 0)
if (pci_device_from_OF_node(p2pbridge, &bus, &devfn) < 0) {
if (pci_device_from_OF_node(np, &bus, &devfn) == 0) {