On Fri, Apr 26, 2013 at 11:39:20AM +0200, Arnd Bergmann wrote: > On Friday 26 April 2013 13:46:46 Vinod Koul wrote: > > > > The mapping & unmapping of dma buffer (memcpy and memory buffer in this > > txn) is > > required to be performed by the client driver. The dmanegine or dmaengine > > driver > > will not do that for you... > > I've been wondering about this part: since we need to pass the 'struct > device' of > the dma engine (rather than the slave) into dma_map_single, what is the > official > way to do that? Should the slave driver just rely on dma_chan->device->dev to > work correctly for the purpose of dma-mapping.h interfaces?
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