tree f27b438ff9fccfae7fe7c85baf0763663f5b9569
parent 92f092d16c5ff6e71d8e7761e4c9193375d3c994
author Eric Dumazet <edumazet@google.com> 1394294479 -0800
committer David S. Miller <davem@davemloft.net> 1394480661 -0400

pkt_sched: move the sanity test in qdisc_list_add()

The WARN_ON(root == &noop_qdisc)) added in qdisc_list_add()
can trigger in normal conditions when devices are not up.
It should be done only right before the list_add_tail() call.

Fixes: e57a784d8cae4 ("pkt_sched: set root qdisc before change() in attach_default_qdiscs()")
Reported-by: Valdis Kletnieks <Valdis.Kletnieks@vt.edu>
Tested-by: Mirco Tischler <mt-ml@gmx.de>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>