Re: [PATCH] EDD: Check for correct EDD 3.0 length

From: Gleb Natapov
Date: Tue May 15 2012 - 11:53:09 EST

On Tue, May 15, 2012 at 04:41:43PM +0100, Alan Cox wrote:
> > Hmm, will work if standard I/O addresses are used for master/slave, but
> > I do not see this information be exposed via /sys by EDD. So how can I
> > do it from OS installer with current kernel or kernel with reverted
> > patch?
> I don't think we provide the needed info for this (or EDD 2.1 which I've
> just discovered actually shipped in some plug in boards). Not sure 2.1 is
> around online anywhere.
> Thats a separate problem though.
It is not. You are saying that the code we have now supported Phoenix
spec and now it is not. This is not the case though.

> My big concern is that we are sure it disappearing won't break anything.
> It's been noticed at SuSE so it's obviously not entiely invisible.
So lets ask Hannes what problem he tries to fix by the patch.

> I'd love to see EDD 1.1 and 2.1 support in the kernel as I could then
> merge pata_hdd which drives original MFM/RLL drives. However I don't
> believe its worth the effort unlike doing 3.0 right.
It is OK to add Phoenix support to the code. To do that code needs to
figure what spec BIOS uses and parse the data differently, not just blindly
misinterpret binary buffer.

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