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-rw-r--r--arch/powerpc/kernel/prom_parse.c15
1 files changed, 13 insertions, 2 deletions
diff --git a/arch/powerpc/kernel/prom_parse.c b/arch/powerpc/kernel/prom_parse.c
index 0dfbe1cd28e..12c51e4ad2b 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);