1 files changed, 6 insertions, 0 deletions

diff --git a/arch/powerpc/kernel/pci_dn.c b/arch/powerpc/kernel/pci_dn.c
index 12c4c9e9bbc7..1c18953514c3 100644
--- a/arch/powerpc/kernel/pci_dn.c
+++ b/arch/powerpc/kernel/pci_dn.c
@@ -31,6 +31,7 @@
 #include <asm/pci-bridge.h>
 #include <asm/pSeries_reconfig.h>
 #include <asm/ppc-pci.h>
+#include <asm/firmware.h>
 
 /*
  * Traverse_func that inits the PCI fields of the device node.
@@ -59,6 +60,11 @@ static void * __devinit update_dn_pci_info(struct device_node *dn, void *data)
                 pdn->busno = (regs[0] >> 16) & 0xff;
                 pdn->devfn = (regs[0] >> 8) & 0xff;
         }
+        if (firmware_has_feature(FW_FEATURE_ISERIES)) {
+                u32 *busp = (u32 *)get_property(dn, "linux,subbus", NULL);
+                if (busp)
+                        pdn->bussubno = *busp;
+        }
 
         pdn->pci_ext_config_space = (type && *type == 1);
         return NULL;