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SubjectRe: [PATCH] firmware/efi: export a routine to retrieve efi-variables by GUID
On Fri, Mar 18, 2011 at 03:16:22PM -0700, Dan Williams wrote:
> From: Dave Jiang <>
> The efivars module already scans all available variables, normalizes the
> variable names, and stores them in a list. Rather than duplicate this
> to efi runtime services interface let drivers query variable data by
> This is needed by the isci driver which relies on an efi variable to
> store critical platform parameters like gloablly unique sas addresses
> and phy configuration parameters. This is similar to the
> pci_map_biosrom() enabling that allows the isci driver to retrieve the
> same data in the non-efi case.
> For the built-in case efivars is moved to subsys_initcall.
> Signed-off-by: Dave Jiang <>
> Signed-off-by: Dan Williams <>
> ---
> Not sure who looks after efivars.c, but and git shortlog
> fingered Greg as a likely target.

Yes, that is me.

> We are currently targeting a late merge of the isci driver through the
> staging tree into 2.6.39. This is a pre-requisite to be able to use the
> driver on an efi enabled platform.

You are? That's news to me, why didn't you ask the staging tree
maintainer about this?

I needed all patches in linux-next _before_ the merge window opened to
be able to accept it. So, sorry, it will have to wait until .40.
Please send me the isci driver and I will be glad to queue it up for
staging for that kernel.


greg k-h

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