linux-kernel - Re: [PATCH wireless 3/5] wifi: b43: Stop/wake correct queue in PIO Tx path when QoS is disabled

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Date: Sun, 31 Dec 2023 00:02:32 +0000
From: Rahul Rameshbabu <sergeantsagara@...tonmail.com>
To: Larry Finger <Larry.Finger@...inger.net>
Cc: Kalle Valo <kvalo@...nel.org>, linux-wireless@...r.kernel.org, b43-dev@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH wireless 3/5] wifi: b43: Stop/wake correct queue in PIO Tx path when QoS is disabled

On Sat, 30 Dec, 2023 16:23:58 -0600 "Larry Finger" <Larry.Finger@...inger.net> wrote:
> On 12/30/23 13:43, Rahul Rameshbabu wrote:
>> Unfortunately, new firmware would not prevent the need to fix up the
>> code with regards to QoS being disabled via the kernel parameter or
>> using OpenFW. That said, new firmware could help us drop the fifth patch
>> in this series. I am thinking about using b43-fwcutter to extract
>> proprietary fw from a newer release of broadcom-wl to see if that makes
>> a difference. That said, I am a bit puzzled since the device I am
>> testing on released in early 2011, and I used firmware released in late
>> 2012.
>
> Unfortunately, it is very difficult to get the parameters for fwcutter from an
> x86 binary. Some of the other architectures are easier.

Just tried this with the x86 binary just because and ran into extraction
issues as expected. I could not find other architecture options from
Broadcom's download page, but I may not have been looking well enough...

  ❯ b43-fwcutter ./wlc_hybrid.o_shipped
  Sorry, the input file is either wrong or not supported by b43-fwcutter.
  This file has an unknown MD5sum 6889dbd24abf8006de5cc6eddd138518.

  https://www.broadcom.com/support/download-search?pg=Wireless+Embedded+Solutions+and+RF+Components&pf=Legacy+Wireless&pn=&pa=Driver&po=&dk=BCM4331&pl=&l=true

I guess, for now, we can keep the exception for bcm4331 and see if
future firmware extractions help.

--
Thanks,

Rahul Rameshbabu