[Intel-gfx] force wake reference counting (another try)

[Keith Packard]

On Tue, 12 Apr 2011 09:30:22 -0700, Ben Widawsky <ben at bwidawsk.net> wrote:

> I am going to spend at least a day tracking down, and hopefully fixing
> warnings if you agree with my next statement that it is in fact a
> problem. My hope is there aren't too many cases.

I can't see how we can survive without using exactly one lock covering
the wake locks on SNB. Has someone tried sticking a simple spinlock
around the whole sequence (force_wake_get, op, force_wake_put)?

-- 
keith.packard at intel.com
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