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SubjectRe: [PATCH] Add IDE mode support for SB600 SATA
> * Unlike Jmicron's case, this doesn't affect PCI bus scan.  Actually, it 
> does change class code but that's not as disruptive as Jmicron's case
> and as long as ahci ignores class code, it doesn't really matter.
> Driver can be chosen by changing loading order - this is both plus and
> minus.

The load order is basically undefined. You want AHCI so we should do
this early. That means either putting the same gunk all over the kernel
(drivers/ide, drivers/ata/*ati* drivers/ata/ahci) or in one place.

> * As Arjan pointed out, that unlock-modify-lock sequence should be done
> on resume too.

The infrastructure for this is already handled by the pci resume quirk
patches I sent.
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