[Bug 99733] [ILK] [BAT] gem_exec_fence at await-hang-default hangs on CI

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=99733

--- Comment #3 from Chris Wilson <chris at chris-wilson.co.uk> ---
commit 8c12d121590ebe5a43bf9a0aedbbeb192f257846
Author: Chris Wilson <chris at chris-wilson.co.uk>
Date:   Fri Feb 10 18:52:14 2017 +0000

    drm/i915: Move the irq_barrier for reset earlier into reset_prepare

Popped out when looking at that sequence and thinking "Ironlake". I don't think
it explains the BUG_ON, but definitely should affect the timing that lead up to
it.

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