[Bug 298369] LinuxKPI/iwlwifi: TX task drains itself in lkpi_lsta_free, blocking unload and causing a deadlkres panic

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=298369

Bjoern A. Zeeb <bz@FreeBSD.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|New                         |Open
             Blocks|                            |273620
           Assignee|wireless@FreeBSD.org        |bz@FreeBSD.org
                 CC|                            |bz@FreeBSD.org

--- Comment #1 from Bjoern A. Zeeb <bz@FreeBSD.org> ---
There's actually two issues here:

(a) the net80211 ieee80211_ifdetach() has a problem by itself previously
observed over the last years by many.  That's a net80211 tech debt part and
will likely be addressed at some time.

(b) for the LinuxKPI TX callback I had previous private reports; I do have a
local patch which will fix that problem;  the patch also changes data
structures and locks in order to be able to get closer Linux expectations of
drivers (rtw89 has assertions triggered without it).  I am done through 2 of
three of the list and lock changes and it'll likely be out in a week or so
(depending on how much time I have for that part).


Referenced Bugs:

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=273620
[Bug 273620] iwlwifi meta-bug
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