[Bug 91790] TONGA hang in amdgpu_ring_lock

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=91790

--- Comment #13 from Andy Furniss <adf.lists at gmail.com> ---
(In reply to Mathias Tillman from comment #11)
> (In reply to Alex Deucher from comment #10)
> > Created attachment 118056 [details] [review] [review]
> > possible fix
> > 
> > I think this patch should fix it.
> 
> No luck here I'm afraid - I'm having a hard time reproducing it during
> normal desktop usage (with or without the patch), but it did lockup while
> running Unigine Valley.

I see drm-next-4.3 is now ahead again, haven't tested that yet.

With patch + drm-next-4.3-wip, I haven't yet managed to lock valley - but I've
only had time to do a couple of runs (45 min then 90 min) from a clean boot.
Maybe later when I've been up a while doing other things I'll try harder.

Patch doesn't apply with git apply - did it by hand.

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