1 files changed, 5 insertions, 4 deletions

diff --git a/arch/powerpc/kernel/pci_64.c b/arch/powerpc/kernel/pci_64.c
index 7138092826aa..6d05a1f377b5 100644
--- a/arch/powerpc/kernel/pci_64.c
+++ b/arch/powerpc/kernel/pci_64.c
@@ -1006,8 +1006,9 @@ void __devinit pci_process_bridge_OF_ranges(struct pci_controller *hose,
 
                 switch ((pci_space >> 24) & 0x3) {
                 case 1:         /* I/O space */
-                        hose->io_base_phys = cpu_phys_addr;
-                        hose->pci_io_size = size;
+                        hose->io_base_phys = cpu_phys_addr - pci_addr;
+                        /* handle from 0 to top of I/O window */
+                        hose->pci_io_size = pci_addr + size;
 
                         res = &hose->io_resource;
                         res->flags = IORESOURCE_IO;
@@ -1117,8 +1118,8 @@ static int get_bus_io_range(struct pci_bus *bus, unsigned long *start_phys,
         } else {
                 /* Root Bus */
                 res = &hose->io_resource;
-                *start_phys = hose->io_base_phys;
-                *start_virt = (unsigned long) hose->io_base_virt;
+                *start_phys = hose->io_base_phys + res->start;
+                *start_virt = (unsigned long) hose->io_base_virt + res->start;
                 if (res->end > res->start)
                         *size = res->end - res->start + 1;
                 else {