1 files changed, 13 insertions, 2 deletions

diff --git a/arch/powerpc/kernel/prom_parse.c b/arch/powerpc/kernel/prom_parse.c
index 0dfbe1cd28eb..12c51e4ad2b4 100644
--- a/arch/powerpc/kernel/prom_parse.c
+++ b/arch/powerpc/kernel/prom_parse.c
@@ -920,9 +920,20 @@ static int of_irq_map_oldworld(struct device_node *device, int index,
 
         /*
          * Old machines just have a list of interrupt numbers
-         * and no interrupt-controller nodes.
+         * and no interrupt-controller nodes. We also have dodgy
+         * cases where the APPL,interrupts property is completely
+         * missing behind pci-pci bridges and we have to get it
+         * from the parent (the bridge itself, as apple just wired
+         * everything together on these)
          */
-        ints = get_property(device, "AAPL,interrupts", &intlen);
+        while (device) {
+                ints = get_property(device, "AAPL,interrupts", &intlen);
+                if (ints != NULL)
+                        break;
+                device = device->parent;
+                if (device && strcmp(device->type, "pci") != 0)
+                        break;
+        }
         if (ints == NULL)
                 return -EINVAL;
         intlen /= sizeof(u32);