Re: [PATCH RESEND 1/1] PCI: Add ATS-disable quirk for AMD Radeon R7 GPUs

[Joerg Roedel]

On Mon, Apr 08, 2019 at 01:37:25PM +0300, Nikolai Kostrigin wrote:
> ATS is broken on this hardware (at least for Stoney Ridge
> based laptop) and causes IOMMU stalls and
> system failure. Disable ATS on these devices to make them
> usable again with IOMMU enabled
> Thanks to Joerg Roedel <jroedel@xxxxxxx> for help.
> 
> https://bugzilla.kernel.org/show_bug.cgi?id=194521
> 
> Signed-off-by: Nikolai Kostrigin <nickel@xxxxxxxxxxxx>

Acked-by: Joerg Roedel <jroedel@xxxxxxx>

I helped Nikolai with tracking this issue down to ATS handling and
suggested adding the quirk.