[PATCH v2 1/4] dma-mapping: Add devm_ interface for dma_map_single()

[Greg KH]

On Fri, Jun 06, 2014 at 02:45:06PM +0300, Eli Billauer wrote:
> Hello Joerg.
> 
> 
> On 05/06/14 00:25, Joerg Roedel wrote:
> >
> >What you are trying to do should work with dma_alloc_noncoherent(). The
> >API allows partial syncs on this memory, so you should be fine.
> Please try to put yourself in my position: I have a driver that I care
> about, which works fine for a few years. It's based upon dma_map_single(),
> which seems to be the common way to get non-coherent memory, even for the
> driver's entire lifespan. I realize that dma_alloc_* was the intended way to
> do it, but fact is that dma_map_* has become the common choice.

Is your driver in the kernel tree?  If not, you really are on your own :(

greg k-h