[src/trunk]: src/sys/arch/xen/xen Account for the CRC len (Jean-Jacques.Puig)

[christos <christos%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/3b4edf0839e6
branches:  trunk
changeset: 345133:3b4edf0839e6
user:      christos <christos%NetBSD.org@localhost>
date:      Mon May 09 15:11:35 2016 +0000

description:
Account for the CRC len (Jean-Jacques.Puig)

diffstat:

 sys/arch/xen/xen/xennetback_xenbus.c |  9 +++++----
 1 files changed, 5 insertions(+), 4 deletions(-)

diffs (30 lines):

diff -r 965e3b72b4d4 -r 3b4edf0839e6 sys/arch/xen/xen/xennetback_xenbus.c
--- a/sys/arch/xen/xen/xennetback_xenbus.c      Mon May 09 15:05:15 2016 +0000
+++ b/sys/arch/xen/xen/xennetback_xenbus.c      Mon May 09 15:11:35 2016 +0000
@@ -1,4 +1,4 @@
-/*      $NetBSD: xennetback_xenbus.c,v 1.55 2016/02/09 08:32:10 ozaki-r Exp $      */
+/*      $NetBSD: xennetback_xenbus.c,v 1.56 2016/05/09 15:11:35 christos Exp $      */
 
 /*
  * Copyright (c) 2006 Manuel Bouyer.
@@ -26,7 +26,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: xennetback_xenbus.c,v 1.55 2016/02/09 08:32:10 ozaki-r Exp $");
+__KERNEL_RCSID(0, "$NetBSD: xennetback_xenbus.c,v 1.56 2016/05/09 15:11:35 christos Exp $");
 
 #include "opt_xen.h"
 
@@ -720,8 +720,9 @@
        if (__predict_false(txreq->offset + txreq->size > PAGE_SIZE))
                return "crossing a page boundary";
 
-       const int maxlen =
-           vlan ? (ETHER_VLAN_ENCAP_LEN + ETHER_MAX_LEN) : ETHER_MAX_LEN;
+       int maxlen = ETHER_MAX_LEN - ETHER_CRC_LEN;
+       if (vlan)
+               maxlen += ETHER_VLAN_ENCAP_LEN;
        if (__predict_false(txreq->size > maxlen))
                return "too big";