[Bug 111626] [CI][SHARDS] igt at perf_pmu@busy-idle-no-semaphores-bcs0 - dmesg-warn - WARNING: possible irq lock inversion dependency detected

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=111626

--- Comment #6 from Chris Wilson <chris at chris-wilson.co.uk> ---
Yes, we need a runtime-pm reference, and we use the active engine-pm as that
also tells if it was idle and we can skip. The engine-pm put(wakeref) should be
irqsafe for this purpose.

I don't know what the lock->wait_lock is -- it doesn't look like one of ours,
which makes it more baffling how it got coupled into our wakeref.

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