[Bug 278935] [iwlwifi] fails to establish a connection, or fails to maintain it (intel 8265)

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=278935

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|Open                        |In Progress

--- Comment #9 from Bjoern A. Zeeb <bz@FreeBSD.org> ---
(In reply to Dave Cottlehuber from comment #8)

So two problems here:

(1) by the time you actually make it UP you get kicked:
wlan0: [80:2a:a8:84:e2:a3] recv disassociate (reason: 34 (too many frames need
to be acknowledged))

(2) when that session then tries to go back up and ends up going down entirely
you hit PR 275255 and then it's game over until possible manual intervention:
iwlwifi0: Couldn't drain frames for staid 0, status 0x8
iwlwifi0: lkpi_sta_auth_to_scan:1429: mo_sta_state(NOTEXIST) failed: -5

Where status 8 is ADD_STA_MODIFY_NON_EXISTING_STA: driver requested to modify a
station that doesn't exist.

But given we are only trying to remove it from the FW after that
"mo_sta_state(NOTEXIST)" something else nuked the station already.

Let's try to fix (2) first as that'll help to keep it at least going.

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