PCI_BUS_FIND_CAPA(9)

NAME
pci_bus_find_capability - query for devices' capabilities

SYNOPSIS

int pci_bus_find_capability (struct pci_bus * bus, unsigned int devfn, int cap);

ARGUMENTS

bus the PCI bus to query

devfn
    PCI device to query

cap capability code

DESCRIPTION

Like pci_find_capability but works for pci devices that do not have a pci_dev structure set up yet.

Returns the address of the requested capability structure within the device's PCI configuration space or 0 in case the device does not support it.