APPLIED[G]: [SRU] [F/Unstable/OEM-5.6] [PATCH 0/1] Fix IOMMU error on AMD Radeon Pro W5700

[seth.forshee at canonical.com]

On Wed, Aug 05, 2020 at 12:08:20AM +0800, Kai-Heng Feng wrote:
> BugLink: https://bugs.launchpad.net/bugs/1890306
> 
> [Impact]
> AMD Radeon Pro W5700 doesn't work at all, driver failed to probe the
> device due to IOMMU error.
> 
> [Fix]
> Disable PCI ATS for the device.
> 
> [Test]
> After applying the patch, there's no more IOMMU error, and the driver
> can correctly probe the device. The grahpics also works great.
> 
> [Regression Potential]
> Low. amdgpu is known to work well with ATS disabled. In addition to
> that, AMD confirmed it's the correct fix for this card, so the chance to
> break anything is rather low.

Applied to groovy/master-next, thanks!