From 3850e22f5146d2ff5b66f1b7460d4720d5f1b6c7 Mon Sep 17 00:00:00 2001
From: Russell King <rmk+kernel@arm.linux.org.uk>
Date: Thu, 21 Jun 2012 10:37:35 +0100
Subject: [PATCH] dmaengine: omap: add support for returning residue in
 tx_state method

Add support for returning the residue for a particular descriptor by
reading the current DMA address for the source or destination side of
the transfer as appropriate, and walking the scatterlist until we find
an entry containing the current DMA address.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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