[Xen-changelog] Make MTU rx check in netfront more permissive to allow for 8021q vlan tagging.

[Xen patchbot -3.0-testing <patchbot-3.0-testing@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User kaf24@xxxxxxxxxxxxxxxxxxxx
# Node ID 6d255ac3786cc8d3318c7ed03d68968635eaf356
# Parent  484a14acfc261b7768189162e86b391eeff09659
Make MTU rx check in netfront more permissive to allow for 8021q vlan tagging.

Signed-off-by: Keir Fraser <keir@xxxxxxxxxxxxx>

diff -r 484a14acfc26 -r 6d255ac3786c 
linux-2.6-xen-sparse/drivers/xen/netfront/netfront.c
--- a/linux-2.6-xen-sparse/drivers/xen/netfront/netfront.c      Sun Mar 12 
18:36:00 2006
+++ b/linux-2.6-xen-sparse/drivers/xen/netfront/netfront.c      Wed Mar 15 
11:53:53 2006
@@ -830,11 +830,11 @@
        }
 
        while ((skb = __skb_dequeue(&rxq)) != NULL) {
-               if (skb->len > (dev->mtu + ETH_HLEN)) {
+               if (skb->len > (dev->mtu + ETH_HLEN + 4)) {
                        if (net_ratelimit())
                                printk(KERN_INFO "Received packet too big for "
                                       "MTU (%d > %d)\n",
-                                      skb->len - ETH_HLEN, dev->mtu);
+                                      skb->len - ETH_HLEN - 4, dev->mtu);
                        skb->len  = 0;
                        skb->tail = skb->data;
                        init_skb_shinfo(skb);

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