tree bc590a02ea4c79082993e0d026d9a6d60b894345
parent d814b847be7b47575a1cc2194760d3461e1c43c8
author Steffen Klassert <steffen.klassert@secunet.com> 1411373246 +0200
committer David S. Miller <davem@davemloft.net> 1411935586 -0400

ip6_gre: Return an error when adding an existing tunnel.

ip6gre_tunnel_locate() should not return an existing tunnel if
create is true. Otherwise it is possible to add the same
tunnel multiple times without getting an error.

So return NULL if the tunnel that should be created already
exists.

Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: David S. Miller <davem@davemloft.net>