From 8046c4b99898ba8ea33f2b2e9a596f628457fd7b Mon Sep 17 00:00:00 2001
From: Mike Smith <msmith@FreeBSD.org>
Date: Tue, 12 Feb 2002 01:28:49 +0000
Subject: [PATCH] Don't claim to have routed an interrupt when the method
 actually returned an error.

---
 sys/dev/pci/pci_pci.c | 6 ++++--
 sys/dev/pci/pcivar.h  | 5 +++++
 2 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/sys/dev/pci/pci_pci.c b/sys/dev/pci/pci_pci.c
index 9c1de44f88b..8b5eef5eddd 100644
--- a/sys/dev/pci/pci_pci.c
+++ b/sys/dev/pci/pci_pci.c
@@ -409,7 +409,9 @@ pcib_route_interrupt(device_t pcib, device_t dev, int pin)
      */
     bus = device_get_parent(pcib);
     intnum = PCIB_ROUTE_INTERRUPT(device_get_parent(bus), pcib, parent_intpin + 1);
-    device_printf(pcib, "routed slot %d INT%c to irq %d\n", pci_get_slot(dev), 
-		  'A' + pin - 1, intnum);
+    if (PCI_INTERRUPT_VALID(intnum)) {
+	device_printf(pcib, "routed slot %d INT%c to irq %d\n", pci_get_slot(dev), 
+		      'A' + pin - 1, intnum);
+    }
     return(intnum);
 }
diff --git a/sys/dev/pci/pcivar.h b/sys/dev/pci/pcivar.h
index 432f885d9ca..0b8cf149544 100644
--- a/sys/dev/pci/pcivar.h
+++ b/sys/dev/pci/pcivar.h
@@ -245,6 +245,11 @@ PCIB_ACCESSOR(bus,		BUS,		u_int32_t)
 
 #undef PCIB_ACCESSOR
 
+/*
+ * PCI interrupt validation.
+ */
+#define PCI_INTERRUPT_VALID(x)	(((x) != 0) && ((x) != 255))
+
 /*
  * Convenience functions.
  *