linux-kernel - Re: Fwd: After kernel 6.3.7 or 6.3.8 b43 driver fails

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Date:   Mon, 26 Jun 2023 16:33:04 -0500
From:   Sardonimous <sardonimous@...mail.com>
To:     Larry Finger <Larry.Finger@...inger.net>,
        Arnd Bergmann <arnd@...db.de>,
        Bagas Sanjaya <bagasdotme@...il.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux Regressions <regressions@...ts.linux.dev>,
        Linux Wireless <linux-wireless@...r.kernel.org>,
        Netdev <netdev@...r.kernel.org>
Cc:     Michael Büsch <m@...s.ch>,
        kernel test robot <lkp@...el.com>,
        Simon Horman <simon.horman@...igine.com>,
        Kalle Valo <kvalo@...nel.org>
Subject: Re: Fwd: After kernel 6.3.7 or 6.3.8 b43 driver fails


On 6/26/23 10:21 AM, Larry Finger wrote:
> On 6/26/23 07:44, Sardonimous wrote:
>> If I were to send you some test patches, could you create a kernel 
>> with them applied?
>>
>> Doubtful.
>
> Sardonimous,
>
> OK, that essentially eliminates  getting DMA to work. The cost of a 
> MacBookPro7 is too much for me to acquire one to debug that issue.
>
> On my PowerBook G4, I also got the failure to connect, thus I should 
> be able to fix that problem, but getting a new kernel with the fix 
> onto your machine will not be easy.

It might be possible to follow the arch instructions for patching the kernel

https://wiki.archlinux.org/title/Kernel/Arch_build_system

It takes about a day to rebuild the kernel following this procedure.

> Is it possible to ssh into your machine, or to use TeamViewer? Those 
> questions do not need an answer now, but think about them.

This is complicated by being in a CGNAT environment.  I usually do this 
via tailscale.  Will have to think about it.

> Larry

Should pio=1 qos=0 cause the problems that it does?  It if is no longer 
a supported configuration, perhaps it should fail more gracefully.