[Bug 97985] [BDW] System hang while running Qt QML application, with unclaimed registers

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=97985

--- Comment #18 from Chris Wilson <chris at chris-wilson.co.uk> ---
The RPS registers should already be guarded by a wakeref (the interrupts are
only enabled whilst the GPU is active). Suggests that we are losing the
wakeref, but that too should have shown up in a WARN when we tried to decrement
it when already 0. Same for 02a08 which has an explicit wakeref across the
interrupt handling.

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