[Bug 100858] [SNB] igt at drv_module_reload@basic-reload-final fails and hard hangs the system

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=100858

--- Comment #1 from Chris Wilson <chris at chris-wilson.co.uk> ---
The answer lies in if the GPU didn't write the dword to where we wanted, where
did it write it? And the same worrying question will be for lots of different
ops. The HWS is intact otherwise it would have complained about a gpu hang...
Actually no, that test isn't checking so that's a more reasonable explanation
that the HWS write also went astray, i.e. it is likely that nothing is right in
the way the GPU is addressing memory.

In load/unload we do a GPU reset, so everything should be sane...

Remove the store dword check and see it it still hard hangs. If so, we can
start removing chunks from the load/unload sequence and see at what point it
works.

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