linux-kernel - Re: [regression] nct6775 does not load in 5.4 and 5.5, bisected to b84398d6d7f90080

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Date:   Sun, 23 Feb 2020 17:39:59 +0100
From:   Wolfram Sang <wsa@...-dreams.de>
To:     Guenter Roeck <linux@...ck-us.net>
Cc:     Martin Volf <martin.volf.42@...il.com>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        Jean Delvare <jdelvare@...e.com>, linux-i2c@...r.kernel.org,
        linux-hwmon@...r.kernel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [regression] nct6775 does not load in 5.4 and 5.5, bisected to
 b84398d6d7f90080


> Outch. This means that the code is broken. ACPIBASE is not configured,
> or disabled, or the code reads from the wrong PCI configuration register.
> What I don't understand is why this works with v5.3 kernels; the code
> looks just as bad there for me. I must be missing something. Either case,
> the only thing you can really do at this point is to blacklist the
> iTCO_wdt driver.
> 
> Other than that, we can only hope that someone who understands above
> code can provide a fix. Maybe Wolfram has an idea.

I'd love to but I don't know much about ACPI and its resource handling.
This is really Jean's realm, and and Jarkko, Andy, and Mika work with
this driver, too. Let's hope they can provide feedback after the
weekend.


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