From: Isaku Yamahata <yamahata@valinux.co.jp>
Date: Thu, 20 Dec 2012 15:12:52 +0000 (+0000)
Subject: ip_gre: make ipgre_tunnel_xmit() not parse network header as IP unconditionally
X-Git-Tag: v3.8-rc2~19^2~19
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=412ed94744d16806fbec3bd250fd94e71cde5a1f;p=pandora-kernel.git

ip_gre: make ipgre_tunnel_xmit() not parse network header as IP unconditionally

ipgre_tunnel_xmit() parses network header as IP unconditionally.
But transmitting packets are not always IP packet. For example such packet
can be sent by packet socket with sockaddr_ll.sll_protocol set.
So make the function check if skb->protocol is IP.

Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

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