[PATCH] powerpc: Fix irq routing on some PowerMac 32

[Benjamin Herrenschmidt]

What about that patch ? If it doesn't help, please send me a new dmesg
log of 2.6.19 with patches -and- with #defin'ing DEBUG in
arch/powerpc/kernel/pci_32.c and prom_parse.c.

Index: linux-work/arch/powerpc/kernel/prom_parse.c
===================================================================
--- linux-work.orig/arch/powerpc/kernel/prom_parse.c	2006-12-14 09:27:22.000000000 +1100
+++ linux-work/arch/powerpc/kernel/prom_parse.c	2006-12-14 09:29:36.000000000 +1100
@@ -920,9 +920,20 @@
 
 	/*
 	 * 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);