linux-kernel - Re: [PATCH] firmware/efi: export a routine to retrieve efi-variables by GUID

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Message-ID: <20110321191219.GA6761@infradead.org>
Date:	Mon, 21 Mar 2011 15:12:19 -0400
From:	Christoph Hellwig <hch@...radead.org>
To:	Dan Williams <dan.j.williams@...el.com>
Cc:	James Bottomley <James.Bottomley@...e.de>,
	Greg KH <gregkh@...e.de>, "Jiang, Dave" <dave.jiang@...el.com>,
	"linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>,
	"Danecki, Jacek" <jacek.danecki@...el.com>,
	"Ciechanowski, Ed" <ed.ciechanowski@...el.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"dmilburn@...hat.com" <dmilburn@...hat.com>,
	"Nadolski, Edmund" <edmund.nadolski@...el.com>,
	Jeff Garzik <jeff@...zik.org>,
	Christoph Hellwig <hch@...radead.org>
Subject: Re: [PATCH] firmware/efi: export a routine to retrieve efi-variables
 by GUID

On Mon, Mar 21, 2011 at 12:07:18PM -0700, Dan Williams wrote:
> Ideally this would have been something that just showed up in an
> option-rom bar on the device, but that did not happen so it is left
> to software.  For legacy-bios we scan adapter rom space looking for
> our table, for efi it's comparatively cleaner we just grab this efi
> variable identified by its own GUID.

In the worse case a late merged icsi driver just wouldn't support
EFI-based boards out ot the box until 2.6.40.  I don't think that
is too much of an issue.

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