Hello all, I have some oldish MIPS-based (Lantiq Danube) routers that have a PCI bus and a VIA 6212 USB-controller connected to it. The USB controller requires I/O resources in addition to memory. It seems that with kernel 3.18 and newer PCI I/O resources can no longer be allocated on this platform. I tracked the problem down to a patch set from Liviu Dudau (Support for creating generic PCI host bridges from DT). After this patch the function pci_address_to_pio in drivers/of/address.c hits the check address > IO_SPACE_LIMIT since address on this SoC is 0x1AE00000 and IO_SPACE_LIMIT is 0xFFFF on MIPS (PCI_IOBASE is not defined). Changing IO_SPACE_LIMIT to 0xFFFFFFFF I can work around the problem, but I think that is not the proper solution. Any ideas on how to fix this? Best regards, Matti Laakso
