From: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Date: Tue, 19 Jan 2010 07:24:55 +0000 (+0000)
Subject: sh: prepare the DMA driver for slave functionality
X-Git-Tag: v2.6.34-rc1~285^2~40^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=fc4618575f79eea062cdc51715040e40cd35b71c;p=pandora-kernel.git

sh: prepare the DMA driver for slave functionality

Slave DMA functionality uses scatter-gather arrays for data transfers,
whereas memcpy just uses a single data buffer. This patch converts the
current memcpy implementation in shdma.c to use scatter-gather, making it
just a special case with one SG-element. This allows us to isolate
descriptor list manipulations and locking into one function, thus reducing
error chances.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Acked-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---

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