1 files changed, 20 insertions, 0 deletions

diff --git a/arch/ppc64/kernel/pci.c b/arch/ppc64/kernel/pci.c
index ae6f579d3fa0..d0d55c7908ef 100644
--- a/arch/ppc64/kernel/pci.c
+++ b/arch/ppc64/kernel/pci.c
@@ -108,8 +108,28 @@ void  pcibios_resource_to_bus(struct pci_dev *dev, struct pci_bus_region *region
         region->end = res->end - offset;
 }
 
+void pcibios_bus_to_resource(struct pci_dev *dev, struct resource *res,
+                              struct pci_bus_region *region)
+{
+        unsigned long offset = 0;
+        struct pci_controller *hose = pci_bus_to_host(dev->bus);
+
+        if (!hose)
+                return;
+
+        if (res->flags & IORESOURCE_IO)
+                offset = (unsigned long)hose->io_base_virt - pci_io_base;
+
+        if (res->flags & IORESOURCE_MEM)
+                offset = hose->pci_mem_offset;
+
+        res->start = region->start + offset;
+        res->end = region->end + offset;
+}
+
 #ifdef CONFIG_HOTPLUG
 EXPORT_SYMBOL(pcibios_resource_to_bus);
+EXPORT_SYMBOL(pcibios_bus_to_resource);
 #endif
 
 /*