Quick regression status pre 7.3-rc2

[Thorsten Leemhuis]

Hi Linus! Here is a quick report about two unresolved regressions from
this cycle that seem to bother multiple people and thus might be good to
get fixed sooner rather than later; fixes are available for both of
them, but are just sitting on the list afaics:

* 9417c5818a0146 ("wifi: mt76: mt7921: validate CLC firmware records")
[v7.3-rc1] causes probe failures for some widely used mediatek wifi chips:

  - Mikhail Gavrilov reported this on 2026-08-16 (e.g. right before the
merge window opened):
https://lore.kernel.org/lkml/20260816132325.23007-1-mikhail.v.gavrilov@xxxxxxxxx/
  - Junjie Cao reported this on 2026-09-01 with another fix (withdrawn
meanwhile):
https://lore.kernel.org/stable/20260901011840.416787-1-junjie.cao@xxxxxxxxx/


  The culprit's author within hours of the first report provided a fix
that got "Tested-by" from the two aforementioned reporters:
https://lore.kernel.org/linux-wireless/20260816174841.1918-1-acharyalaxman8848@
7.2 final/-rc8gmail.com/

  The maintainers afaics never reacted to the fix and it three weeks
later still marked as "new" in patchwork:
https://patchwork.kernel.org/project/linux-wireless/patch/20260816174841.1918-1-acharyalaxman8848@xxxxxxxxx/


* 9b80bd9cab40c4 ("wifi: mt76: mt7921: add regulatory wiphy self manager
support") [v7.3-rc1] and e9f3f1cc133fc2 ("wifi: mt76: mt7925: add
regulatory wiphy self manager support") [v7.3-rc1] also causes probe
failures for some widely used mediatek wifi chips; the problem is in a
similar area and affects similar chips, but from my limited
understanding seems to be different.

 - Klara Modin reported the regression on 2026-08-24:
https://lore.kernel.org/linux-wireless/aoyxqHYvSuaBeubf@xxxxxxxxxxxxxxxx/
 - Devin Wittmayer within a day reproduced the problem and provided a
fix that got a Tested-by from Klara:
https://lore.kernel.org/lkml/20260825181712.28548-1-lucid_duck@xxxxxxxxxxxxx/
 - David Gow recently ran into the same problem and provided a Tested-by
for the fix, too:
https://lore.kernel.org/lkml/bcf1ee9b-97e5-43f9-81eb-67ac6a0a98dc@xxxxxxxxxxxx/

  The maintainers never reacted to that afaics and that patch is still
marked as "new" in patchwork:
https://patchwork.kernel.org/project/linux-wireless/patch/20260825181712.28548-1-lucid_duck@xxxxxxxxxxxxx/


FWIW, there were two other regressions that bothered multiple people and
would nearly have been mentioned in this report, but Greg send PRs with
those an ~two hours ago to you.

HTH, Ciao, Thorsten