Bug#996713: firmware-brcm80211: firmware becomes non-responsive while running as an access point on RPI4

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From	Andres Salomon <dilinger@queued.net>
Newsgroups	linux.debian.bugs.dist, linux.debian.kernel
Subject	Bug#996713: firmware-brcm80211: firmware becomes non-responsive while running as an access point on RPI4
Date	Wed, 05 Jan 2022 02:00:02 +0100
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Cross-posted to 2 groups.

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On Mon, 25 Oct 2021 18:00:16 -0400 Andres Salomon wrote:

 >
 >
 > Now I'll try a 5.14 kernel backport (with the firmware from bullseye).
 > If it STILL happens, then I'll try and get a patch upstream to detect
 > this issue and reinit the hardware.
 >
 >

Just an update - shortly after I tried testing the 5.14 kernel, the 
microsd card in my pi4 died. While I waited for a new card to arrive, I 
also picked up a much faster wifi adapter. So while I'm still using the 
brcm80211 chip for our 2.4ghz AP, I have a 5ghz that every other device 
in our house except for one is using. So despite still using a 5.10 
kernel, I haven't been able to reproduce this because the 2.4ghz wifi 
just isn't that busy. Clearly the bug was being triggered by either 
multiple 2.4ghz wifi devices, or a lot of 2.4ghz traffic (or both).

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Thread

Bug#996713: firmware-brcm80211: firmware becomes non-responsive while running as an access point on RPI4 Andres Salomon <dilinger@queued.net> - 2021-10-17 19:30 +0200
  Bug#996713: firmware-brcm80211: firmware becomes non-responsive while running as an access point on RPI4 Andres Salomon <dilinger@queued.net> - 2021-10-26 00:10 +0200
  Bug#996713: firmware-brcm80211: firmware becomes non-responsive while running as an access point on RPI4 Diederik de Haas <didi.debian@cknow.org> - 2021-11-15 09:30 +0100
    Bug#996713: firmware-brcm80211: firmware becomes non-responsive while running as an access point on RPI4 Andres Salomon <dilinger@queued.net> - 2021-11-15 10:40 +0100
  Bug#996713: firmware-brcm80211: firmware becomes non-responsive while running as an access point on RPI4 Andres Salomon <dilinger@queued.net> - 2022-01-05 02:00 +0100

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