linux-kernel - [PATCH 4.2.y-ckt 055/211] spi: atmel: Fix DMA-setup for transfers with more than 8 bits per word

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Date:	Tue,  5 Jan 2016 11:42:43 -0800
From:	Kamal Mostafa <kamal@...onical.com>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com
Cc:	David Mosberger <davidm@...uge.net>,
	Nicolas Ferre <nicolas.ferre@...el.com>,
	Mark Brown <broonie@...nel.org>,
	Kamal Mostafa <kamal@...onical.com>
Subject: [PATCH 4.2.y-ckt 055/211] spi: atmel: Fix DMA-setup for transfers with more than 8 bits per word

4.2.8-ckt1 -stable review patch.  If anyone has any objections, please let me know.

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

From: David Mosberger-Tang <davidm@...uge.net>

commit 06515f83908d038d9e12ffa3dcca27a1b67f2de0 upstream.

The DMA-slave configuration depends on the whether <= 8 or > 8 bits
are transferred per word, so we need to call
atmel_spi_dma_slave_config() with the correct value.

Signed-off-by: David Mosberger <davidm@...uge.net>
Signed-off-by: Nicolas Ferre <nicolas.ferre@...el.com>
Signed-off-by: Mark Brown <broonie@...nel.org>
Signed-off-by: Kamal Mostafa <kamal@...onical.com>
---
 drivers/spi/spi-atmel.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/spi/spi-atmel.c b/drivers/spi/spi-atmel.c
index c9eca34..a89ea0d 100644
--- a/drivers/spi/spi-atmel.c
+++ b/drivers/spi/spi-atmel.c
@@ -774,7 +774,8 @@ static int atmel_spi_next_xfer_dma_submit(struct spi_master *master,
 
 	*plen = len;
 
-	if (atmel_spi_dma_slave_config(as, &slave_config, 8))
+	if (atmel_spi_dma_slave_config(as, &slave_config,
+				       xfer->bits_per_word))
 		goto err_exit;
 
 	/* Send both scatterlists */
-- 
1.9.1

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