--- drivers/acpi/namespace/nswalk.c~	Wed Oct 24 14:06:22 2001
+++ drivers/acpi/namespace/nswalk.c	Wed Nov  6 21:13:37 2002
@@ -63,6 +63,8 @@
 
 	FUNCTION_ENTRY ();
 
+	if (!parent_node)
+		return NULL;	/* Uhm... */
 
 	if (!child_node) {
 		/* It's really the parent's _scope_ that we want */