linux-kernel - Re: mfd/intel_pmc_bxt: `intel_pmc_get_resources()` results in page fault

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Message-Id: <em1f48e0b2-2380-45ef-a0c1-2c38a477aa5f@andys-imac.local>
Date:   Tue, 25 Jan 2022 16:27:02 +0000
From:   "Andy Pont" <andy.pont@...systems.com>
To:     "Mika Westerberg" <mika.westerberg@...ux.intel.com>
Cc:     "Paul Menzel" <pmenzel@...gen.mpg.de>,
        "Zha Qipeng" <qipeng.zha@...el.com>, linux-kernel@...r.kernel.org
Subject: Re: mfd/intel_pmc_bxt: `intel_pmc_get_resources()` results in page fault

Hello Mika,

>Thanks! The dump looks OK to me wrt. the PMC device. However, I think I
>found the bug.
>
>Can you try if the below hack fixes the issue?
I’ll give the patch a test and let you know how I get on.

Which fields within the ACPI dump are you looking at?  When we boot the 
same hardware platform / Ubuntu image with the stock AMI BIOS then we 
don’t see the kernel oops.

-Andy.