On 11-02-17 11:36 AM, Matthew Garrett wrote:

On Wed, Feb 16, 2011 at 02:45:56PM -0500, Jeff Garzik wrote:

quoted

How is the assignment of the AHCI BAR handled?  Does this happen  
automatically because it's an early fixup?

That is traditionally the stumbling block...

Yes, because it's an early fixup the kernel should allocate it itself. 
It's small enough that I'd hope we don't have trouble finding one...

It works here (the AHCI BAR setup) with this patch,
though the workaround itself doesn't work because my
Dell machine requires extra/secret fiddling to switch
things fully over to AHCI.

The patch does seem harmless enough to include in the kernel, though.