kern/52211: vioif stops on dmamap load error

[hannken%eis.cs.tu-bs.de@localhost]

>Number:         52211
>Category:       kern
>Synopsis:       vioif stops on dmamap load error
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Wed May 03 08:40:00 +0000 2017
>Originator:     Juergen Hannken-Illjes
>Release:        NetBSD 7.1
>Organization:
	
>Environment:
	
	
System: NetBSD vpnserv.isf.cs.tu-bs.de 7.1 NetBSD 7.1 (gateway.i386) #0: Mon Mar 13 16:40:12 MET 2017  build%builder.isf.cs.tu-bs.de@localhost:/build/nbsd7/obj/obj.i386/sys/arch/i386/compile/gateway.i386 i386
Architecture: i386
Machine: i386
>Description:
	
From time to time the machine prints

	vioif0: tx dmamap load failed, error code 27

and most times the interface seems to stop as the machine is no longer
accessible from the network.

     $NetBSD: if_vioif.c,v 1.7.2.3 2016/12/23 05:57:40 snj Exp $
>How-To-Repeat:
	
>Fix:
	

>Unformatted: