linux-kernel - [PATCH 095/133] spi: spi-davinci: Fix direction in dma_map

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Message-Id: <1376692475-28413-96-git-send-email-kamal@canonical.com>
Date:	Fri, 16 Aug 2013 15:33:57 -0700
From:	Kamal Mostafa <kamal@...onical.com>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com
Cc:	Christian Eggers <ceggers@....de>, Mark Brown <broonie@...aro.org>,
	Kamal Mostafa <kamal@...onical.com>
Subject: [PATCH 095/133] spi: spi-davinci: Fix direction in dma_map_single()

3.8.13.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Christian Eggers <ceggers@....de>

commit 89c66ee890af18500fa4598db300cc07c267f900 upstream.

Commit 048177ce3b3962852fd34a7e04938959271c7e70 (spi: spi-davinci:
convert to DMA engine API) introduced a regression: dma_map_single()
is called with direction DMA_FROM_DEVICE for rx and for tx.

Signed-off-by: Christian Eggers <ceggers@....de>
Acked-by: Matt Porter <mporter@...com>
Signed-off-by: Mark Brown <broonie@...aro.org>
Signed-off-by: Kamal Mostafa <kamal@...onical.com>
---
 drivers/spi/spi-davinci.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/spi/spi-davinci.c b/drivers/spi/spi-davinci.c
index 13661e1..9f3d1bb 100644
--- a/drivers/spi/spi-davinci.c
+++ b/drivers/spi/spi-davinci.c
@@ -608,7 +608,7 @@ static int davinci_spi_bufs(struct spi_device *spi, struct spi_transfer *t)
 		else
 			buf = (void *)t->tx_buf;
 		t->tx_dma = dma_map_single(&spi->dev, buf,
-				t->len, DMA_FROM_DEVICE);
+				t->len, DMA_TO_DEVICE);
 		if (!t->tx_dma) {
 			ret = -EFAULT;
 			goto err_tx_map;
-- 
1.8.1.2

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