linux-kernel - [PATCH AUTOSEL for 4.9 08/24] spi: sh-msiof: Fix DMA transfer size check

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Message-ID: <20171122222604.20122-8-alexander.levin@verizon.com>
Date:   Wed, 22 Nov 2017 22:26:12 +0000
From:   alexander.levin@...izon.com
To:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "stable@...r.kernel.org" <stable@...r.kernel.org>
Cc:     Hiromitsu Yamasaki <hiromitsu.yamasaki.ym@...esas.com>,
        Simon Horman <horms+renesas@...ge.net.au>,
        Mark Brown <broonie@...nel.org>, alexander.levin@...izon.com
Subject: [PATCH AUTOSEL for 4.9 08/24] spi: sh-msiof: Fix DMA transfer size
 check

From: Hiromitsu Yamasaki <hiromitsu.yamasaki.ym@...esas.com>

[ Upstream commit 36735783fdb599c94b9c86824583df367c65900b ]

DMA supports 32-bit words only,
even if BITLEN1 of SITMDR2 register is 16bit.

Fixes: b0d0ce8b6b91 ("spi: sh-msiof: Add DMA support")
Signed-off-by: Hiromitsu Yamasaki <hiromitsu.yamasaki.ym@...esas.com>
Signed-off-by: Simon Horman <horms+renesas@...ge.net.au>
Acked-by: Geert Uytterhoeven <geert+renesas@...der.be>
Acked-by: Dirk Behme <dirk.behme@...bosch.com>
Signed-off-by: Mark Brown <broonie@...nel.org>
Signed-off-by: Sasha Levin <alexander.levin@...izon.com>
---
 drivers/spi/spi-sh-msiof.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/spi/spi-sh-msiof.c b/drivers/spi/spi-sh-msiof.c
index 1de3a772eb7d..cbf02ebb30a2 100644
--- a/drivers/spi/spi-sh-msiof.c
+++ b/drivers/spi/spi-sh-msiof.c
@@ -862,7 +862,7 @@ static int sh_msiof_transfer_one(struct spi_master *master,
 				break;
 			copy32 = copy_bswap32;
 		} else if (bits <= 16) {
-			if (l & 1)
+			if (l & 3)
 				break;
 			copy32 = copy_wswap32;
 		} else {
-- 
2.11.0