netdev - [PATCH] flex_can: Correct the checking for frame length in flexcan_start

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Date:   Tue,  2 Jan 2018 10:44:18 +0700
From:   Luu An Phu <phu.luuan@....com>
To:     wg@...ndegger.com, mkl@...gutronix.de
Cc:     linux-can@...r.kernel.org, netdev@...r.kernel.org,
        stefan-gabriel.mirea@....com, "phu.luuan" <phu.luuan@....com>
Subject: [PATCH] flex_can: Correct the checking for frame length in flexcan_start_xmit()

From: "phu.luuan" <phu.luuan@....com>

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@....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 0626dcf..760d2c0 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, struct net_device *dev)
 		data = 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 = be32_to_cpup((__be32 *)&cf->data[4]);
 		flexcan_write(data, &priv->tx_mb->data[1]);
 	}
-- 
1.9.1