pcit_set_config_address
pcit_set_config_address(0, 0, 0x68);
if ((res = pcit_set_config_address(0, devfn, 0)))
pcit_set_config_address(0, 0, 0x68);
if ((res = pcit_set_config_address(bus->number, devfn, reg)))
if ((res = pcit_set_config_address(bus->number, devfn, reg)))