[RESEND PATCH] dmaengine: at_xdmac: fix residue computation

On Thu, Mar 10, 2016 at 10:17:55AM +0100, Ludovic Desroches wrote:

When computing the residue we need two pieces of information: the current
descriptor and the remaining data of the current descriptor. To get
that information, we need to read consecutively two registers but we
can't do it in an atomic way. For that reason, we have to check manually
that current descriptor has not changed.

Applied, thanks


-- 
~Vinod