netdev - Re: [PATCH 0/3] Fix for KSZ DSA switch shutdown

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Date:   Wed, 15 Sep 2021 07:42:20 +0200
From:   Lino Sanfilippo <LinoSanfilippo@....de>
To:     Vladimir Oltean <olteanv@...il.com>
Cc:     Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        Saravana Kannan <saravanak@...gle.com>,
        "Rafael J. Wysocki" <rafael@...nel.org>, p.rosenberger@...bus.com,
        woojung.huh@...rochip.com, UNGLinuxDriver@...rochip.com,
        vivien.didelot@...il.com, davem@...emloft.net, kuba@...nel.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/3] Fix for KSZ DSA switch shutdown

Hi,

On 14.09.21 at 20:48, Vladimir Oltean wrote:
> On Mon, Sep 13, 2021 at 01:01:20PM +0200, Lino Sanfilippo wrote:
>>>>> Could you post the full kernel output? The picture you've posted is
>>>>> truncated and only shows a WARN_ON in rpi_firmware_transaction and is
>>>>> probably a symptom and not the issue (which is above and not shown).
>>>>>
>>>>
>>>> Unfortunately I dont see anything in the kernel log. The console output is all I get,
>>>> thats why I made the photo.
>>>
>>> To clarify, are you saying nothing above this line gets printed? Because
>>> the part of the log you've posted in the picture is pretty much
>>> unworkable:
>>>
>>> [   99.375389] [<bf0dc56c>] (bcm2835_spi_shutdown [spi_bcm2835]) from [<c0863ca0>] (platform_drv_shutdown+0x2c/0x30)
>>>
>>> How do you access the device's serial console? Use a program with a
>>> scrollback buffer like GNU screen or something.
>>>
>>
>> Ah no, this is not over a serial console. This is what I see via hdmi. I do not have a working serial connection yet.
>> Sorry I know this trace part is not very useful, I will try to get a full dump.
>
> Lino, are you going to provide a kernel output so I could look at your new breakage?
> If you could set up a pstore logger with a ramoops region, you could
> dump the log after the fact. Or if HDMI is all you have, you could use
> an HDMI capture card to record it. Or just record the screen you're
> looking at, as long as you don't have very shaky hands, whatever...
>

Yes, I will try to get something useful. I have already set up a serial connection
now. I still see the shutdown stopping with your patch but I have not seen the
kernel dump any more. I will try further and provide a dump as soon as I am successful.

Regards,
Lino