linux-kernel - Re: [PATCH] ACPI, APEI, Add APEI

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Message-ID: <20110616015736.GA32533@srcf.ucam.org>
Date:	Thu, 16 Jun 2011 02:57:36 +0100
From:	Matthew Garrett <mjg59@...f.ucam.org>
To:	Huang Ying <ying.huang@...el.com>
Cc:	Len Brown <lenb@...nel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Andi Kleen <andi@...stfloor.org>,
	"Luck, Tony" <tony.luck@...el.com>,
	"linux-acpi@...r.kernel.org" <linux-acpi@...r.kernel.org>
Subject: Re: [PATCH] ACPI, APEI, Add APEI _OSC support

On Thu, Jun 16, 2011 at 09:55:58AM +0800, Huang Ying wrote:
> On 06/16/2011 09:38 AM, Matthew Garrett wrote:
> > I think we probably need to make the HEST decision early, and use that 
> > to decide how to make the generic call. Our experience has been that 
> > many firmware vendors only expect _OSC to be called once with any given 
> > UUID - multiple calls can result in unexpected behaviour.
> 
> acpi_bus_osc_support is called via subsys_initcall.  It is a little hard
> to do all checking before that.  Is it possible to call
> acpi_bus_osc_support later?

Yeah, this is going to be a problem. We have the HEST available at this 
point so we ought to be able to parse it, though. I'll take a look 
tomorrow.

-- 
Matthew Garrett | mjg59@...f.ucam.org
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