From: Qipan Li <Qipan.Li@csr.com>
Date: Mon, 14 Apr 2014 06:30:01 +0000 (+0800)
Subject: spi: sirf: fix spi full-duplex DMA transferring issue
X-Git-Tag: omap-for-v3.16/fixes-against-rc1~39^2~29^2~1^5~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=bf83fd6402a856eeb9a22c364c50ccf9bbdf9b17;p=pandora-kernel.git

spi: sirf: fix spi full-duplex DMA transferring issue

sometimes t->tx can be equal with t->rx. for example, spidev will make
tx and rx point to spidev->buffer at the same time. currently, for this
case, we map the buffer BIDIRECTION to fix the cache consistency.

Signed-off-by: Qipan Li <Qipan.Li@csr.com>
Signed-off-by: Barry Song <Baohua.Song@csr.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
---

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