diff -Naurp linux-2.6.17-rc5.orig/arch/mips/pci/pci.c linux-2.6.17-rc5/arch/mips/pci/pci.c
--- linux-2.6.17-rc5.orig/arch/mips/pci/pci.c	2006-03-20 00:53:29.000000000 -0500
+++ linux-2.6.17-rc5/arch/mips/pci/pci.c	2006-06-04 02:19:06.000000000 -0400
@@ -20,11 +20,19 @@
  * Make this long-lived  so that we know when shutting down
  * whether we probed only or not.
  */
+#ifdef CONFIG_SGI_IP27
+int pci_probe_only = 1;
+#else
 int pci_probe_only;
+#endif
 
 #define PCI_ASSIGN_ALL_BUSSES	1
 
+#ifdef CONFIG_SGI_IP27
+unsigned int pci_probe;
+#else
 unsigned int pci_probe = PCI_ASSIGN_ALL_BUSSES;
+#endif
 
 /*
  * The PCI controller list.
@@ -119,10 +127,12 @@ static int __init pcibios_init(void)
 	/* Scan all of the recorded PCI controllers.  */
 	for (next_busno = 0, hose = hose_head; hose; hose = hose->next) {
 
+#ifndef CONFIG_SGI_IP27
 		if (request_resource(&iomem_resource, hose->mem_resource) < 0)
 			goto out;
 		if (request_resource(&ioport_resource, hose->io_resource) < 0)
 			goto out_free_mem_resource;
+#endif
 
 		if (!hose->iommu)
 			PCI_DMA_BUS_IS_PHYS = 1;