From: Florian Westphal <fw@strlen.de>
Date: Fri, 14 Feb 2014 12:14:39 +0000 (+0100)
Subject: ip_tunnel: return more precise errno value when adding tunnel fails
X-Git-Tag: v3.15-rc1~113^2~338
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6dd3c9ec2387725a8e529fae64415cd538b955b7;p=pandora-kernel.git

ip_tunnel: return more precise errno value when adding tunnel fails

Currently this always returns ENOBUFS, because the return value of
__ip_tunnel_create is discarded.

A more common failure is a duplicate name (EEXIST).  Propagate the real
error code so userspace can display a more meaningful error message.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
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