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:

quoted

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.

-- 
dwmw2