[Intel-gfx] [PATCH] drm/i915: Re-enable rc6 w/fix

[Ben Widawsky]

On Mon, Mar 14, 2011 at 09:55:01PM -0700, Ben Widawsky wrote:
> This fixes a race condition with MI_SET_CONTEXT and setting of the
> PWRCTXA register. If PWRCTXA ends up getting set before MI_SET_CONTEXT
> completes, it's possible that the system will enter rc6, and try to
> return to the default render context, which if unset, could cause a GPU
> hang
> 
> Resolve https://bugzilla.kernel.org/show_bug.cgi?id=28582

I'm still waiting for feedback on bugzilla if this patch works like the
previous. Just submitting it here for review while we wait...