diff -Nur linux-2.6.28.orig/arch/mips/include/asm/mips-boards/generic.h linux-2.6.28/arch/mips/include/asm/mips-boards/generic.h
--- linux-2.6.28.orig/arch/mips/include/asm/mips-boards/generic.h	2008-12-25 00:26:37.000000000 +0100
+++ linux-2.6.28/arch/mips/include/asm/mips-boards/generic.h	2009-01-09 23:03:02.000000000 +0100
@@ -92,7 +92,7 @@
 extern void mips_reboot_setup(void);
 
 #ifdef CONFIG_PCI
-extern void mips_pcibios_init(void);
+extern int mips_pcibios_init(void);
 #else
 #define mips_pcibios_init() do { } while (0)
 #endif
diff -Nur linux-2.6.28.orig/arch/mips/mti-malta/malta-pci.c linux-2.6.28/arch/mips/mti-malta/malta-pci.c
--- linux-2.6.28.orig/arch/mips/mti-malta/malta-pci.c	2008-12-25 00:26:37.000000000 +0100
+++ linux-2.6.28/arch/mips/mti-malta/malta-pci.c	2009-01-09 23:02:02.000000000 +0100
@@ -87,10 +87,11 @@
 	.mem_resource	= &msc_mem_resource,
 };
 
-void __init mips_pcibios_init(void)
+int __init mips_pcibios_init(void)
 {
 	struct pci_controller *controller;
 	resource_size_t start, end, map, start1, end1, map1, map2, map3, mask;
+	void __iomem *io_map_base;
 
 	switch (mips_revision_sconid) {
 	case MIPS_REVISION_SCON_GT64120:
@@ -230,7 +231,7 @@
 		controller = &msc_controller;
 		break;
 	default:
-		return;
+		return 0;
 	}
 
 	if (controller->io_resource->start < 0x00001000UL)	/* FIXME */
@@ -239,5 +240,14 @@
 	iomem_resource.end &= 0xfffffffffULL;			/* 64 GB */
 	ioport_resource.end = controller->io_resource->end;
 
+	io_map_base = ioremap(MIPS_MSC01_PCI_REG_BASE,
+				controller->io_resource->end - controller->io_resource->start + 1);
+	if (!io_map_base)
+		return -EBUSY;
+
+	controller->io_map_base = (unsigned long)io_map_base;
+
 	register_pci_controller(controller);
+	
+	return 0;
 }