Re: [PATCH 0/2] PCI: Skylake PCH ACS quirks

[Bjorn Helgaas]

On Thu, Mar 31, 2016 at 04:34:26PM -0600, Alex Williamson wrote:
> Intel Skylake systems attempted to implement ACS on the PCH root
> ports, but it came out a wee bit off.  As noted in the second patch
> and the datasheets from Intel, dwords were used for the ACS
> capability and control words, so we see the capabilities correctly
> but the control register is an extra 2 bytes offset.  With this
> quirk we can fix the kernel, unfortunately lspci will still show
> the wrong ACS control bits though.  Thanks,
> 
> Alex
> 
> ---
> 
> Alex Williamson (2):
>       PCI: Reverse standard ACS vs device specific ACS enabling
>       PCI: Quirk PCH root port ACS for Sunrise Point

Wow, hard to imagine how that got through validation.

Applied to pci/virtualization for v4.7, thanks, Alex!