--- arch/mips/mti-malta/malta-pci.c

+++ arch/mips/mti-malta/malta-pci.c

@@ -247,6 +247,8 @@ void __init mips_pcibios_init(void)

iomem_resource.end &= 0xfffffffffULL; /* 64 GB */

ioport_resource.end = controller->io_resource->end;

+ controller->io_map_base = mips_io_port_base;

+

register_pci_controller(controller);

}