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Subject: Re: Linux 2.4.20 ACPI
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: David Woodhouse <dwmw2@infradead.org>
Cc: "Grover, Andrew" <andrew.grover@intel.com>,
       "'Ducrot Bruno'" <poup@poupinou.org>,
       Felix Seeger <seeger@sitewaerts.de>,
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On Wed, 2002-11-20 at 21:59, David Woodhouse wrote:
> 
> alan@lxorguk.ukuu.org.uk said:
> >  I guess sonypi could take the ACPI global lock ?
> 
> I assume that's not a serious suggestion. Perhaps it could release the 
> region while it's not _actually_ using it, and the ACPI code could be fixed 
> to not touch regions which it doesn't own.

It isnt about regions. The microcontroller talks a message protocol,
much the same actually as most power microcontroller seem to do. Its
just Sony also added other stuff to the protocol.

Taking the acpi lock looks like its a generic way to deal with this
situation. Its made more important because a few sony laptops actually
require ACPI to do pci/irq setup

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