From: Jarek Poplawski <redacted>
Date: Thu, 21 Aug 2008 05:49:11 +0000

pkt_sched: Fix qdisc_watchdog() vs. dev_deactivate() race

dev_deactivate() can skip rescheduling of a qdisc by qdisc_watchdog()
or other timer calling netif_schedule() after dev_queue_deactivate().
We prevent this checking aliveness before scheduling the timer. Since
during deactivation the root qdisc is available only as qdisc_sleeping
additional accessor qdisc_root_sleeping() is created.

With feedback from Herbert Xu [off-list ref]

Signed-off-by: Jarek Poplawski <redacted>

Applied, thanks a lot Jarek.