Re: [PATCH v2] PCI: Add ATS-disable quirk for AMD Stoney GPUs

[Samuel Sieb]

On 07/12/2017 07:56 PM, Bjorn Helgaas wrote:
> On Fri, Apr 07, 2017 at 04:32:18PM +0200, Joerg Roedel wrote:
> > From: Joerg Roedel <jroedel@xxxxxxx>
> >
> > ATS is broken on this hardware and causes IOMMU stalls and
> > system failure. Disable ATS on these devices to make them
> > usable again with IOMMU enabled.
> >
> > Note that the commit in the Fixes-tag is not buggy, it
> > just uncovers the problem in the hardware by increasing
> > the ATS-flush rate.
> >
> > Fixes: b1516a14657a ('iommu/amd: Implement flush queue')
> > Signed-off-by: Joerg Roedel <jroedel@xxxxxxx>
>
> Applied with Alex's ack to pci/virtualization for v4.14, thanks!

Is there any chance of getting this into an earlier kernel?  This is a 
pretty devastating bug for users!  I'm currently providing patched 
kernels, but if they run upgrades and get a new kernel without noticing 
it, any filesystem they access will get completely mangled.