[Intel-gfx] [PATCH 1/3] drm/i915/perf: rework aging tail workaround

[Dixit, Ashutosh]

On Sat, 21 Mar 2020 21:44:43 -0700, Dixit, Ashutosh wrote:
>
> Actually a couple of further improvements to the loop above are
> possible. First there is no reason to start at previous_tail, we can just
> start at the aligned hw_tail itself.

Unless we deliberately want to wait and delay declaring the data as valid,
i.e. we are really not sure what is happening and it seems "safer" to wait
for an extra report.