From: Phil Sutter <phil@nwl.cc>
Date: Fri, 2 Aug 2013 09:37:40 +0000 (+0200)
Subject: af_packet: fix for sending VLAN frames via packet_mmap
X-Git-Tag: v3.12-rc1~132^2~375
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=cbd89acb9eb2;p=pandora-kernel.git

af_packet: fix for sending VLAN frames via packet_mmap

Since tpacket_fill_skb() parses the protocol field in ethernet frames'
headers, it's easy to see if any passed frame is a VLAN one and account
for the extended size.

But as the real protocol does not turn up before tpacket_fill_skb()
runs which in turn also checks the frame length, move the max frame
length calculation into the function.

Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: David S. Miller <davem@davemloft.net>
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