[PATCH] drm/amdgpu/gmc6: fix DMA mask

[Paul Menzel]

Dear Alex,


On 27.10.21 20:23, Alex Deucher wrote:
> On Wed, Oct 27, 2021 at 2:22 PM Alex Deucher <alexander.deucher at amd.com> wrote:
>>
>> The DMA mask on SI parts is 40 bits not 44.  Looks like a copy
>> paste typo.
>>
> 
> Bug: https://gitlab.freedesktop.org/drm/amd/-/issues/1762
> 
> Fixed locally.

As I have no way to reproduce this, as the ring gfx timeout error is 
logged ten seconds after the IO_PAGE_FAULT, is very likely to be related?

Hopefully I am going to be able to test this on Friday. Does AMD’s QA 
team have the cards to test the `iommu.forcedac=1` case? Is that test 
case going to be added to the “test protocol”?

Lastly, should a Fixes tag be added, so it’s picked up for the stable 
series?


Kind regards,

Paul