$NetBSD: patch-hotplug_NetBSD_vif-bridge,v 1.1.1.1 2016/07/04 07:30:51 jnemeth Exp $

--- hotplug/NetBSD/vif-bridge.orig	2015-01-12 17:53:24.000000000 +0100
+++ hotplug/NetBSD/vif-bridge	2015-01-19 13:16:37.000000000 +0100
@@ -23,7 +23,10 @@
 	xbridge=$(xenstore-read "$xpath/bridge")
 	xfid=$(xenstore-read "$xpath/frontend-id")
 	xhandle=$(xenstore-read "$xpath/handle")
-	iface=$(xenstore-read "$xpath/vifname")
+	iface=$(xenstore-read "$xpath/vifname") || true
+	if [ x${iface} = "x" ] ; then
+		iface=xvif$xfid.$xhandle
+	fi
 	ifconfig $iface up
 	brconfig $xbridge add $iface
 	xenstore-write $xpath/hotplug-status connected