[Bug 95634] [BAT BYT] "HW access outside of RPM atomic section" on driver unload

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=95634

--- Comment #2 from Chris Wilson <chris at chris-wilson.co.uk> ---
So this would catch the straightforward load/unload, it would not if any work
was done in between that left the default context uninitialised.

We can either flag it as initialised and never load the golden render state for
the default context (which is valid as it should never be executed itself, and
the render state should be applied to all other contexts on first use), or we
go full monty and follow my planned route of making suspend lockless and not
emitting a batch here at all for !execlists:
https://cgit.freedesktop.org/~ickle/linux-2.6/commit/?h=tasklet&id=f8fff5e32923a56ea5ce73a4ae68968bc60b70c8

First two steps are pretty simple though...

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