On Thu, Aug 20, 2015 at 05:34:59PM +0300, Mika Kuoppala wrote:
> If we leave the last_retired_head to pre-reset value, we might
> end up in a situation where intel_ring_space() returns wrong
> value on next hardware init.

http://patchwork.freedesktop.org/patch/46612/
and earlier
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre
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