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

[Kelsey Skunberg]

Applied to Focal/master-next. Thank you!

-Kelsey

On 2020-08-05 00:08:20 , 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.
> 
> Kai-Heng Feng (1):
>   PCI: Mark AMD Navi10 GPU rev 0x00 ATS as broken
> 
>  drivers/pci/quirks.c | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)
> 
> -- 
> 2.17.1
> 
> 
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