Index: head/sys/dev/pci/pci_host_generic_acpi.c
===================================================================
--- head/sys/dev/pci/pci_host_generic_acpi.c
+++ head/sys/dev/pci/pci_host_generic_acpi.c
@@ -207,11 +207,7 @@
 				mcfg_entry++;
 		}
 		if (found) {
-			if (mcfg_entry->EndBusNumber < sc->base.bus_end) {
-				device_printf(dev, "bus end mismatch! expected %d found %d.\n",
-				    sc->base.bus_end, (int)mcfg_entry->EndBusNumber);
-				sc->base.bus_end = mcfg_entry->EndBusNumber;
-			}
+			sc->base.bus_end = mcfg_entry->EndBusNumber;
 			base = mcfg_entry->Address;
 		} else {
 			device_printf(dev, "MCFG exists, but does not have bus %d-%d\n",
@@ -220,9 +216,10 @@
 		}
 	} else {
 		status = acpi_GetInteger(handle, "_CBA", &val);
-		if (ACPI_SUCCESS(status))
+		if (ACPI_SUCCESS(status)) {
 			base = val;
-		else
+			sc->base.bus_end = 255;
+		} else
 			return (ENXIO);
 	}
 
@@ -259,7 +256,6 @@
 		device_printf(dev, "No _BBN, using start bus 0\n");
 		sc->base.bus_start = 0;
 	}
-	sc->base.bus_end = 255;
 
 	/* Get PCI Segment (domain) needed for MCFG lookup */
 	status = acpi_GetInteger(handle, "_SEG", &sc->base.ecam);