Merge branch 'net-sched-sch_htb-first-round-of-fixes'

Eric Dumazet says:

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net/sched: sch_htb: first round of fixes

First round of fixes in sch_htb.

I chose to send a small series, to reduce chances of multiple versions.
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Link: https://patch.msgid.link/20260514095935.3926276-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>