Re: [PATCH] dmaengine: add dmanegine slave map api's

[Russell King - ARM Linux]

On Mon, Sep 17, 2012 at 09:10:23AM +0530, Vinod Koul wrote:
> On Fri, 2012-09-14 at 12:18 +0100, Russell King - ARM Linux wrote:
> > I'm not saying take the slave_id out of the map.  I'm saying, let the
> > DMA engine driver itself figure out what dma_chan to return. 
> But wont that assume the dma controller knows which channel to allocate.
> And how would it know this information? This can be problematic for hard
> wired muxes, but can be easily done for controller which have
> programmable mux.

Well, as I have already said, at the moment you're returning the _first_
_free_ _channel_ on a DMA device, which almost certainly will always be
the wrong one.
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