From: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Date: Wed, 21 May 2014 21:02:35 +0000 (-0700)
Subject: dma: mv_xor: Flush descriptors before activating a channel
X-Git-Tag: v3.2.60~9
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=795bd4fa3417ef8fd7f5e0965c8dbe3817393b49;p=pandora-kernel.git

dma: mv_xor: Flush descriptors before activating a channel

commit 5a9a55bf9157d3490b0c8c4c81d4708602c26e07 upstream.

We need to use writel() instead of writel_relaxed() when starting
a channel, to ensure all the descriptors have been flushed before
the activation.

While at it, remove the unneeded read-modify-write and make the
code simpler.

Signed-off-by: Lior Amsalem <alior@marvell.com>
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
[bwh: Backported to 3.2: it was using __raw_readl() and __raw_writel()
 which are just as wrong]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---

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