Weird ahci init failure possibly caused by PCI layer

[Tejun Heo <tj@kernel.org>]

Hello, Jesse.

There is a pretty weird ahci init failure[1] reported by Reinhard Max
against openSUSE 11.3 on Dell Optiplex 960[2].  It looks like
something between the cpu and the controller isn't properly set up and
register reads on the controller return garbage values.  The problem
appeared somewhere between 2.6.33 and 2.6.34-rc3 and is still present
in -rc5.

The following log from -rc3 seemed :-) relevant to me.

 <3>pci 0000:00:1f.2: no compatible bridge window for [mem 0xff970000-0xff9707ff]
 <4>Expanded resource reserved due to conflict with PCI Bus 0000:00
 <7>reserve RAM buffer: 000000000009e400 - 000000000009ffff
 <7>reserve RAM buffer: 00000000cfdffc00 - 00000000cfffffff

The full log from -rc3 is available[3].  Any ideas?

Thanks.

-- 
tejun

[1] https://bugzilla.novell.com/show_bug.cgi?id=598520
[2] https://bugzillafiles.novell.org/attachment.cgi?id=356199
[3] https://bugzillafiles.novell.org/attachment.cgi?id=356197