Re: [PATCH] Add quirk to set AHCI mode on ICH boards

[Jeff Garzik]

Alan Cox wrote:
> On Thu, 8 Nov 2007 22:46:22 -0500
> Jeff Garzik <jeff@xxxxxxxxxx> wrote:
>
> > On Thu, Nov 08, 2007 at 10:29:37PM -0500, Mark Lord wrote:
> > > And I might even privately patch my own kernels to map the ACHI BAR
> > > in the cases where the BIOS didn't...
> > The inability to do this in the general case is the main reason why
> > AHCI was not unconditionally enabled, even in IDE mode, when it was
> > originally added...  :/
>
> We've done it all the time for various devices without problems (eg S3
> video cards). I'd like to see it go in - although perhaps attached to a
> force_ahci boot param initially

By forcing AHCI, your PATA devices will be inaccessible, in a common 
configuration.  It also means shuffling users from one driver to 
another, which induces breakage.

I was speaking wishfully.  Real life intrudes, alas.

	Jeff


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