1 files changed, 7 insertions, 2 deletions

diff --git a/arch/powerpc/kernel/pci_64.c b/arch/powerpc/kernel/pci_64.c
index 39fadc6e1492..586962f65c2a 100644
--- a/arch/powerpc/kernel/pci_64.c
+++ b/arch/powerpc/kernel/pci_64.c
@@ -560,9 +560,14 @@ long sys_pciconfig_iobase(long which, unsigned long in_bus,
          * G5 machines... So when something asks for bus 0 io base
          * (bus 0 is HT root), we return the AGP one instead.
          */
-        if (machine_is_compatible("MacRISC4"))
-                if (in_bus == 0)
+        if (in_bus == 0 && machine_is_compatible("MacRISC4")) {
+                struct device_node *agp;
+
+                agp = of_find_compatible_node(NULL, NULL, "u3-agp");
+                if (agp)
                         in_bus = 0xf0;
+                of_node_put(agp);
+        }
 
         /* That syscall isn't quite compatible with PCI domains, but it's
          * used on pre-domains setup. We return the first match