linux-kernel - Re: [PATCH 1/3] SCSI: Allow platform-specific code to be run against the SCSI tree

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Message-ID: <20090810161147.GA27277@srcf.ucam.org>
Date:	Mon, 10 Aug 2009 17:11:47 +0100
From:	Matthew Garrett <mjg59@...f.ucam.org>
To:	James Bottomley <James.Bottomley@...senPartnership.com>
Cc:	linux-acpi@...r.kernel.org, linux-scsi@...r.kernel.org,
	shaohua.li@...el.com, linux-ide@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/3] SCSI: Allow platform-specific code to be run
	against the SCSI tree

On Mon, Aug 10, 2009 at 11:03:07AM -0500, James Bottomley wrote:
> On Mon, 2009-08-10 at 15:58 +0100, Matthew Garrett wrote:
> > They're SCSI as far as the device tree is concerned, so the glue 
> > callbacks have to be registered from the SCSI layer. The only 
> > implementation so far is for ACPI and only covers libata, but it could 
> > potentially also be used to tie bay devices to the ofw tree on 
> > openfirmware systems.
> 
> It's hard for me to comment without seeing the scsi_platform_register
> code, but it strikes me that the only SCSI piece it's using is the
> scsi_bus ... what else is SCSI specific in there?

http://lkml.org/lkml/2009/7/13/286 is the ACPI implementation. I guess 
that it could be done entirely in libata if the bus structure is 
exported, but that does then limit it to ata - the code would need to be 
duplicated if anyone wants to bind scsi devices. I've no real 
preference, but this was the implementation suggested when I last posted 
this stuff back in 2005 or so.

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