(In reply to Luke A. Guest from comment #27)
> > FWIW I don't think any of these patches are relevant to you then.
> 
> Not strictly true. As I said, Alex pointed me at this page to try his
> patches. I believe all this is connected. There are issues un/binding
> from/to the driver. There are reset issues as well. 

True, there may be init/cleanup issues with AMD cards that might be better
understood and documented in the open source community if this were fixed in
amdgpu and hopefully that helps you in vfio-pci as well.