From f1deaee0c3ab1950987d7207d613df0417bd251c Mon Sep 17 00:00:00 2001 From: Marek Vasut Date: Thu, 3 Mar 2016 20:45:56 +0100 Subject: [PATCH] can: ifi: Fix TX DLC configuration The TX DLC, the transmission length information, was not written into the transmit configuration register. When using the CAN core with different CAN controller, the receiving CAN controller will receive only the ID part of the CAN frame, but no data at all. This patch adds the TX DLC into the register to fix this issue. Signed-off-by: Marek Vasut Cc: Marc Kleine-Budde Cc: Mark Rutland Cc: Oliver Hartkopp Cc: Wolfgang Grandegger Reviewed-by: Oliver Hartkopp Signed-off-by: Marc Kleine-Budde --- drivers/net/can/ifi_canfd/ifi_canfd.c | 14 ++++++-------- 1 file changed, 6 insertions(+), 8 deletions(-) diff --git a/drivers/net/can/ifi_canfd/ifi_canfd.c b/drivers/net/can/ifi_canfd/ifi_canfd.c index 57581cb80956..fb93122a2bd3 100644 --- a/drivers/net/can/ifi_canfd/ifi_canfd.c +++ b/drivers/net/can/ifi_canfd/ifi_canfd.c @@ -749,8 +749,7 @@ static netdev_tx_t ifi_canfd_start_xmit(struct sk_buff *skb, { struct ifi_canfd_priv *priv = netdev_priv(ndev); struct canfd_frame *cf = (struct canfd_frame *)skb->data; - u32 txst, txid; - u32 txdlc = 0; + u32 txst, txid, txdlc; int i; if (can_dropped_invalid_skb(ndev, skb)) @@ -773,12 +772,11 @@ static netdev_tx_t ifi_canfd_start_xmit(struct sk_buff *skb, txid = cf->can_id & CAN_SFF_MASK; } - if (priv->can.ctrlmode & (CAN_CTRLMODE_FD | CAN_CTRLMODE_FD_NON_ISO)) { - if (can_is_canfd_skb(skb)) { - txdlc |= IFI_CANFD_TXFIFO_DLC_EDL; - if (cf->flags & CANFD_BRS) - txdlc |= IFI_CANFD_TXFIFO_DLC_BRS; - } + txdlc = can_len2dlc(cf->len); + if ((priv->can.ctrlmode & CAN_CTRLMODE_FD) && can_is_canfd_skb(skb)) { + txdlc |= IFI_CANFD_TXFIFO_DLC_EDL; + if (cf->flags & CANFD_BRS) + txdlc |= IFI_CANFD_TXFIFO_DLC_BRS; } if (cf->can_id & CAN_RTR_FLAG) -- 2.30.2