On 23/03/2017 14:05, Mason wrote: > +/* > + * This should probably be module_platform_driver ? > + */ > +builtin_platform_driver(tango_pcie_driver); For the sake of completeness, ERROR: "pci_ecam_map_bus" [drivers/pci/host/pcie-tango.ko] undefined! ERROR: "pci_host_common_probe" [drivers/pci/host/pcie-tango.ko] undefined! The two above functions are currently not exported to modules. I don't know whether this is intentional. Regards.