tree fe1576d55357e8f1530cc9a3df123fbf631274dc
parent fe6fe792faec3fc2d2db39b69651682b8c4e7fcb
author WANG Cong <amwang@redhat.com> 1307604493 -0700
committer David S. Miller <davem@davemloft.net> 1307604493 -0700

netpoll: prevent netpoll setup on slave devices

In commit 8d8fc29d02a33e4bd5f4fa47823c1fd386346093
(netpoll: disable netpoll when enslave a device), we automatically
disable netpoll when the underlying device is being enslaved,
we also need to prevent people from setuping netpoll on
devices that are already enslaved.

Signed-off-by: WANG Cong <amwang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>