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 <[email protected]> Cc: Marc Kleine-Budde <[email protected]> Cc: Mark Rutland <[email protected]> Cc: Oliver Hartkopp <[email protected]> Cc: Wolfgang Grandegger <[email protected]> --- drivers/net/can/ifi_canfd/ifi_canfd.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/net/can/ifi_canfd/ifi_canfd.c b/drivers/net/can/ifi_canfd/ifi_canfd.c index 72f5205..82a33bd 100644 --- a/drivers/net/can/ifi_canfd/ifi_canfd.c +++ b/drivers/net/can/ifi_canfd/ifi_canfd.c @@ -774,10 +774,15 @@ static netdev_tx_t ifi_canfd_start_xmit(struct sk_buff *skb, if (priv->can.ctrlmode & (CAN_CTRLMODE_FD | CAN_CTRLMODE_FD_NON_ISO)) { if (can_is_canfd_skb(skb)) { + txdlc |= can_len2dlc(cf->len); txdlc |= IFI_CANFD_TXFIFO_DLC_EDL; if (cf->flags & CANFD_BRS) txdlc |= IFI_CANFD_TXFIFO_DLC_BRS; + } else { + txdlc |= cf->len; } + } else { + txdlc |= cf->len; } if (cf->can_id & CAN_RTR_FLAG) -- 2.7.0
