commit 5830725f8a36908111ecccf2899d06d6dcf54d45
author Thomas Graf <tgraf@suug.ch> Thu May 10 04:02:41 2007 -0700
committer David S. Miller <davem@sunset.davemloft.net> Thu May 10 23:47:39 2007 -0700
tree 5f06185bf908327f51e027ae35391215e6d80253
parent fc038410b4b1643766f8033f4940bcdb1dace633

[NET]: Fix dev->qdisc race for NETDEV_TX_LOCKED case

When transmit fails with NETDEV_TX_LOCKED the skb is requeued
to dev->qdisc again. The dev->qdisc pointer is protected by
the queue lock which needs to be dropped when attempting to
transmit and acquired again before requeing. The problem is
that qdisc_restart() fetches the dev->qdisc pointer once and
stores it in the `q' variable which is invalidated when
dropping the queue_lock, therefore the variable needs to be
refreshed before requeueing.

Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>