--- //depot/vendor/freebsd/src/sys/amd64/pci/pci_cfgreg.c	2008/09/11 21:45:15
+++ //depot/user/jhb/acpipci/amd64/pci/pci_cfgreg.c	2009/03/23 16:02:11
@@ -119,6 +119,7 @@
 {
 
 	if (cfgmech == CFGMECH_PCIE &&
+	    (bus >= pcie_minbus && bus <= pcie_maxbus) &&
 	    (bus != 0 || !(1 << slot & pcie_badslots)))
 		return (pciereg_cfgread(bus, slot, func, reg, bytes));
 	else
@@ -158,6 +159,7 @@
 {
 
 	if (cfgmech == CFGMECH_PCIE &&
+	    (bus >= pcie_minbus && bus <= pcie_maxbus) &&
 	    (bus != 0 || !(1 << slot & pcie_badslots)))
 		pciereg_cfgwrite(bus, slot, func, reg, data, bytes);
 	else
--- //depot/vendor/freebsd/src/sys/i386/pci/pci_cfgreg.c	2008/09/11 21:45:15
+++ //depot/user/jhb/acpipci/i386/pci/pci_cfgreg.c	2009/03/23 16:02:11
@@ -206,6 +207,7 @@
 {
 
 	if (cfgmech == CFGMECH_PCIE &&
+	    (bus >= pcie_minbus && bus <= pcie_maxbus) &&
 	    (bus != 0 || !(1 << slot & pcie_badslots)))
 		return (pciereg_cfgread(bus, slot, func, reg, bytes));
 	else
@@ -240,6 +242,7 @@
 {
 
 	if (cfgmech == CFGMECH_PCIE &&
+	    (bus >= pcie_minbus && bus <= pcie_maxbus) &&
 	    (bus != 0 || !(1 << slot & pcie_badslots)))
 		pciereg_cfgwrite(bus, slot, func, reg, data, bytes);
 	else