Re: [PATCH 3/5] Move dma_ops from archdata into struct device

From: David Woodhouse
Date: Fri Dec 09 2016 - 14:13:47 EST

On Fri, 2016-12-09 at 19:22 +0100, Christoph Hellwig wrote:
> We'll need a bit of a wieder audience for this I think..
> On Wed, Dec 07, 2016 at 05:11:28PM -0800, Bart Van Assche wrote:
> > Additionally, introduce set_dma_ops(). A later patch will introduce a
> > call to that function in the RDMA drivers that will be modified to use
> > dma_noop_ops.
> This looks good to me, and we had a lot of talk about this for other
> purposes for a while.

Hm, I'm not convinced we want per-device dma_ops. What we want is per-
device IOMMU ops, and any dma_ops are just a generic or platform-
specific (in some cases) wrapper around those. We shouldn't normally
need per-device DMA ops at all.


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