--- xc/programs/Xserver/hw/xfree86/common/xf86pciBus.c.orig	2003-05-23 13:05:29.000000000 -0400
+++ xc/programs/Xserver/hw/xfree86/common/xf86pciBus.c	2003-06-02 12:27:11.000000000 -0400
@@ -215,7 +215,17 @@
 		 * grok host bridges (and multiple bus trees).
 		 */
 		j = info->bus;
+#if defined(__ia64__)
+		/* John Dennis - on Intel Tigers the pci scan leaves multiple
+		 * bridges with a parent (primary) equal to -1, or hence the root.
+		 * This causes the following loop to be infinite as it never walks past
+		 * the initial bridge whose primary is -1. I believe this is equivalent
+		 * to being a multiple bus tree topology. This fix should be revisited
+		 * as the pci code is being reworked in the upstream code. */
+		while (j >= 0) {
+#else
 		while (TRUE) {
+#endif
 		    PciBusPtr pBus = xf86PciBus;
 		    while (pBus && j != pBus->secondary)
 			pBus = pBus->next;