From: Yauhen Kharuzhy <yauhen.kharuzhy@promwad.com>
Date: Thu, 25 Nov 2010 10:11:51 +0000 (+0200)
Subject: mmc: at91_mci: fix multiblock SDIO transfers
X-Git-Tag: v2.6.37-rc8~5^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a2255ff45143001fecbc5e5a4b58fcb999d393ae;p=pandora-kernel.git

mmc: at91_mci: fix multiblock SDIO transfers

The AT91 MCI has special SDIO transfer types: SDIO block and SDIO byte
transfers, but at91_mci driver doesn't use them and handles all SDIO
transfers as ordinary MMC block transfers. This causes problems for
multiple-block SDIO transfers (in particular for 256-bytes blocks).

Fix this situation by checking the opcode for SDIO CMD53 and setting
the transfer type in the AT91_MCI_CMDR register properly.

This patch was tested with libertas SDIO driver: problem with TX
timeouts on big packets was eliminated.

Signed-off-by: Yauhen Kharuzhy <yauhen.kharuzhy@promwad.com>
Cc: <stable@kernel.org>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
---

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