[Intel-gfx] pipe control notify removed?

[Chris Wilson]

On Wed, 15 Dec 2010 11:14:53 +0800, Zhenyu Wang <zhenyuw at linux.intel.com> wrote:
> 
> Chris, just notice you removed pipe control notify entirely on -next,
> that seems wrong to me. In Ironlake time, we've seen interrupt stall issue
> with user interrupt, and be warned user interrupt is deprecated, so we moved
> on to use pipe control notify, although there's a workaround later covered
> that's required on Ironlake. But it's stable finally. And for sandybridge, 
> there's no such workaround needed.

The answer to this is to make sure that such details are kept in the
code comments, especially if such information is not readily available
in the documentation.
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre