linux-kernel - [PATCH 4.9 019/109] spi: sh-msiof: Fix DMA transfer size check

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Message-Id: <20171207125636.913141547@linuxfoundation.org>
Date:   Thu,  7 Dec 2017 13:56:03 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Hiromitsu Yamasaki <hiromitsu.yamasaki.ym@...esas.com>,
        Simon Horman <horms+renesas@...ge.net.au>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Dirk Behme <dirk.behme@...bosch.com>,
        Mark Brown <broonie@...nel.org>,
        Sasha Levin <alexander.levin@...izon.com>
Subject: [PATCH 4.9 019/109] spi: sh-msiof: Fix DMA transfer size check

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

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

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/spi/spi-sh-msiof.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- 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
 				break;
 			copy32 = copy_bswap32;
 		} else if (bits <= 16) {
-			if (l & 1)
+			if (l & 3)
 				break;
 			copy32 = copy_wswap32;
 		} else {