linux-kernel - Re: shpc with acpi=off?

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Message-ID: <20120223084813.39908d81@jbarnes-desktop>
Date:	Thu, 23 Feb 2012 08:48:13 -0800
From:	Jesse Barnes <jbarnes@...tuousgeek.org>
To:	"Michael S. Tsirkin" <mst@...hat.com>
Cc:	linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org,
	lenb@...nel.org, linux-acpi@...r.kernel.org
Subject: Re: shpc with acpi=off?

On Thu, 16 Feb 2012 17:04:22 +0200
"Michael S. Tsirkin" <mst@...hat.com> wrote:

> I have a box where shpc works fine with acpi,
> as well as when acpi is not built into kernel,
> but fails with acpi=off
> Some debugging seems to indicate that
> acpi_get_hp_hw_control_from_firmware
> fails with acpi=off.
> 
> Is this a bug or is there a reason to prevent shpc
> from working in this setup?
> Do we even care about acpi=off?
> Assuming we want to make acpi_get_hp_hw_control_from_firmware
> succeed with acpi=off, what is the best way to do this?
> Check acpi_pci_disabled?

Yeah not sure it's important to have SHPC work with acpi=off.
Disabling ACPI prevents us from getting all sorts of important info
these days...

-- 
Jesse Barnes, Intel Open Source Technology Center

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