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

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Message-ID: <2ebf7968-a324-6f98-e178-45d4d19cfb48@molgen.mpg.de>
Date:   Tue, 25 Jan 2022 15:40:54 +0100
From:   Paul Menzel <pmenzel@...gen.mpg.de>
To:     Mika Westerberg <mika.westerberg@...ux.intel.com>
Cc:     Zha Qipeng <qipeng.zha@...el.com>, linux-kernel@...r.kernel.org,
        Andy Pont <andy.pont@...systems.com>
Subject: Re: mfd/intel_pmc_bxt: `intel_pmc_get_resources()` results in page
 fault

[Cc: +Andy]

Dear Mika,


Am 25.01.22 um 15:26 schrieb Mika Westerberg:

> On Tue, Jan 25, 2022 at 02:08:53PM +0100, Paul Menzel wrote:

>> `intel_pmc_get_resources()` does not set the name member in the `resource`
>> struct `gcr_res` resulting in a page fault.
> 
> On which system you reproduce this,

The dump contains the name:

     Hardware name: Star Labs Lite/Lite, BIOS 8 01/24/2022

> and how? Can you also share ACPI dump from that system.

Note, I only forwarded this from a report in #coreboot. The reporter 
Andy is now in Cc.

Unrelated from that information, the Linux kernel should never run into 
a page fault and not trust system data.


Kind regards,

Paul