From: Cliff Brake <cbrake@bec-systems.com>
Date: Thu, 22 Jan 2009 22:07:03 +0000 (-0500)
Subject: pxamci: enable DMA for write ops after CMD/RESP
X-Git-Tag: v2.6.29-rc4~70^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b6018958a57f6621d6979c4384e42a3df636beed;p=pandora-kernel.git

pxamci: enable DMA for write ops after CMD/RESP

With the PXA270 MMC hardware, there seems to be an issue of
data corruption on writes where a 4KB data block is offset
by one byte.

If we delay enabling the DMA for writes until after the CMD/RESP
has finished, the problem seems to be fixed.

related to PXA270 Erratum #91

Tested-by: Vernon Sauder <VernonInHand@gmail.com>
Signed-off-by: Cliff Brake <cbrake@bec-systems.com>
Acked-by: Eric Miao <eric.miao@marvell.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
---

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