From: "phu.luuan" <phu.lu...@nxp.com> flexcan_start_xmit should write data to register when can_dlc > 4. Because can_dlc is data length and it has value from 1 to 8. But CAN data index has value from 0 to 7. So in case we have data in cf->data[4], the can_dlc has value is more than 4.
Signed-off-by: Luu An Phu <phu.lu...@nxp.com> --- drivers/net/can/flexcan.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/net/can/flexcan.c b/drivers/net/can/flexcan.c index 0626dcf..0e3ff13 100644 --- a/drivers/net/can/flexcan.c +++ b/drivers/net/can/flexcan.c @@ -5,6 +5,7 @@ * Copyright (c) 2009 Sascha Hauer, Pengutronix * Copyright (c) 2010-2017 Pengutronix, Marc Kleine-Budde <ker...@pengutronix.de> * Copyright (c) 2014 David Jander, Protonic Holland + * Copyright 2017 NXP * * Based on code originally by Andrey Volkov <avol...@varma-el.com> * @@ -526,7 +527,7 @@ 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