From: Konstantin Khlebnikov <khlebni...@yandex-team.ru>
Date: Sat, 19 Aug 2017 15:37:07 +0300
> This important to call qdisc_tree_reduce_backlog() after changing queue
> length. Parent qdisc should deactivate class in ->qlen_notify() called from
> qdisc_tree_reduce_backlog() but this happens only if qdisc->q.qlen in zero.
>
> Missed class deactivations leads to crashes/warnings at picking packets
> from empty qdisc and corrupting state at reactivating this class in future.
>
> Signed-off-by: Konstantin Khlebnikov <khlebni...@yandex-team.ru>
> Fixes: 86a7996cc8a0 ("net_sched: introduce qdisc_replace() helper")
Applied and queued up for -stable, thanks.
Please do not add an explict "CC: stable" to networking patches, simply
ask me to queue it up as I handle all networking -stable submissions
myself by hand.
Thank you.
