On Mon, Jun 11, 2012 at 05:20:09PM +0200, Lars-Peter Clausen wrote:

> Another option is to provide the current implementation of the pcm_pointer
> as a standalone legacy function, which can be used by the old platforms
> until their dmaengine drivers have cached up. And add a new residue-only
> implementation which will be mandatory for new drivers. That would make it
> more explicit that those platforms are sort of broken and need to be fixed.
> After all of them have been fixed the legacy pcm_pointer implementation can
> be removed.

This seems like a good approach, yes.