From: Tom Herbert <therbert@google.com>
Date: Tue, 24 Feb 2015 17:17:31 +0000 (-0800)
Subject: udp: In udp_flow_src_port use random hash value if skb_get_hash fails
X-Git-Tag: omap-for-v4.1/fixes-rc1~141^2~393
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=723b8e460d87e957f251dc5764f4ab86af6ab44e;p=pandora-kernel.git

udp: In udp_flow_src_port use random hash value if skb_get_hash fails

In the unlikely event that skb_get_hash is unable to deduce a hash
in udp_flow_src_port we use a consistent random value instead.
This is specified in GRE/UDP draft section 3.2.1:
https://tools.ietf.org/html/draft-ietf-tsvwg-gre-in-udp-encap-04

Signed-off-by: Tom Herbert <therbert@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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