Merge branch 'htb-fixes'

Maxim Mikityanskiy says:

====================
Bugfixes for HTB

The HTB offload feature introduced a few bugs in HTB. One affects the
non-offload mode, preventing attaching qdiscs to HTB classes, and the
other affects the error flow, when the netdev doesn't support the
offload, but it was requested. This short series fixes them.
====================

Acked-by: Cong Wang <cong.wang@bytedance.com>
Signed-off-by: David S. Miller <davem@davemloft.net>