pci_get_pdn_by_devfn
extern struct pci_dn *pci_get_pdn_by_devfn(struct pci_bus *bus,
pdn = pci_get_pdn_by_devfn(bus, devfn);
pdn = pci_get_pdn_by_devfn(bus, devfn);
struct pci_dn *pdn = pci_get_pdn_by_devfn(dev->bus, dev->devfn);
pdn = pci_get_pdn_by_devfn(bus, devfn);
pdn = pci_get_pdn_by_devfn(bus, devfn);
pdn = pci_get_pdn_by_devfn(pdev->bus, pdev->devfn);