[PATCH v2 2/3] drm/ttm: introduce dma cache sync helpers

[Russell King - ARM Linux]

On Tue, Jun 24, 2014 at 06:54:26PM +0900, Alexandre Courbot wrote:
> From: Lucas Stach <dev at lynxeye.de>
> 
> On architectures for which access to GPU memory is non-coherent,
> caches need to be flushed and invalidated explicitly at the
> appropriate places. Introduce two small helpers to make things
> easy for TTM-based drivers.

Have you run this with DMA API debugging enabled?  I suspect you haven't,
and I recommend that you do.

-- 
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improving, and getting towards what was expected from it.