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From:   Sasha Levin <Alexander.Levin@microsoft.com>
To:     "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        "stable@vger.kernel.org" <stable@vger.kernel.org>
CC:     Luu An Phu <phu.luuan@nxp.com>,
        Marc Kleine-Budde <mkl@pengutronix.de>,
        Sasha Levin <Alexander.Levin@microsoft.com>
Subject: [PATCH AUTOSEL for 4.14 089/110] can: flex_can: Correct the checking
 for frame length in flexcan_start_xmit()
Thread-Topic: [PATCH AUTOSEL for 4.14 089/110] can: flex_can: Correct the
 checking for frame length in flexcan_start_xmit()
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Date:   Sat, 3 Feb 2018 18:01:25 +0000
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From: Luu An Phu <phu.luuan@nxp.com>

[ Upstream commit 13454c14550065fcc1705d6bd4ee6d40e057099f ]

The flexcan_start_xmit() function compares the frame length with data
register length to write frame content into data[0] and data[1]
register. Data register length is 4 bytes and frame maximum length is 8
bytes.

Fix the check that compares frame length with 3. Because the register
length is 4.

Signed-off-by: Luu An Phu <phu.luuan@nxp.com>
Reviewed-by: Oliver Hartkopp <socketcan@hartkopp.net>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
---
 drivers/net/can/flexcan.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/can/flexcan.c b/drivers/net/can/flexcan.c
index c4d1140116ea..ed8a2a7ce500 100644
--- a/drivers/net/can/flexcan.c
+++ b/drivers/net/can/flexcan.c
@@ -526,7 +526,7 @@ static int flexcan_start_xmit(struct sk_buff *skb, stru=
ct net_device *dev)
 		data =3D be32_to_cpup((__be32 *)&cf->data[0]);
 		flexcan_write(data, &priv->tx_mb->data[0]);
 	}
-	if (cf->can_dlc > 3) {
+	if (cf->can_dlc > 4) {
 		data =3D be32_to_cpup((__be32 *)&cf->data[4]);
 		flexcan_write(data, &priv->tx_mb->data[1]);
 	}
--=20
2.11.0