Re: [2.6.34-rc1 REGRESSION] ahci 0000:00:1f.2: controller resetfailed (0xffffffff)

[Matthew Wilcox]

On Mon, Apr 12, 2010 at 11:56:41AM -0600, Bjorn Helgaas wrote:
> Linux thinks the windows are:
>   pci_root PNP0A03:00: host bridge window [mem 0x000a0000-0x000bffff]
>   pci_root PNP0A03:00: host bridge window [mem 0x000c0000-0x000effff]
>   pci_root PNP0A03:00: host bridge window [mem 0x000f0000-0x000fffff]
> 
> The 0xa0000-0xbffff one makes good sense.  That's normally MMIO that's
> routed via PCI to the VGA device frame buffer, and we should be able
> to figure out how to avoid that area, e.g., by using BIOS info, PCI
> class codes, etc.
> 
> Now we need to figure how to avoid the 0xc0000-0xeffff and 0xf0000-0xfffff
> windows.  Maybe there's something special about how ACPI describes them.
> 
> Or maybe we're just unlucky because these are the first windows in the
> _CRS list, and Linux tries them in order, while Windows uses a different
> strategy.

Perhaps it's sufficient to try them in reverse order?
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