(In reply to Michel Dänzer from comment #2)
> Christian, could this be related to commit a35f2f34b5b4 "dma-buf: make
> returning the exclusive fence optional", or do you have other ideas? I'm now
> running into this BUG fairly often, roughly every other daily piglit run on
> amd-staging-drm-next.

Good to know, David and I actually already fixed one cause for this. So I
assumed that this should do it, but that obviously isn't the case.

Any usable way to reproduce the issue?