decnet: Do not build routes to devices without decnet private data.

[ Upstream commit a36a0d4008 ]

In particular, make sure we check for decnet private presence
for loopback devices.

Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
This commit is contained in:
David S. Miller 2016-04-10 23:01:30 -04:00 • committed by Sasha Levin
commit 51c9a8515e