From: Marc Kleine-Budde mkl@pengutronix.de
[ Upstream commit d4eb538e1f48b3cf7bb6cb9eb39fe3e9e8a701f7 ]
The previous patch ensures that the TX flags (struct can_isotp_ll_options::tx_flags) are 0 for classic CAN frames or a user configured value for CAN-FD frames.
This patch sets the CAN frames flags unconditionally to the ISO-TP TX flags, so that they are initialized to a proper value. Otherwise when running "candump -x" on a classical CAN ISO-TP stream shows wrongly set "B" and "E" flags.
| $ candump any,0:0,#FFFFFFFF -extA | [...] | can0 TX B E 713 [8] 2B 0A 0B 0C 0D 0E 0F 00 | can0 TX B E 713 [8] 2C 01 02 03 04 05 06 07 | can0 TX B E 713 [8] 2D 08 09 0A 0B 0C 0D 0E | can0 TX B E 713 [8] 2E 0F 00 01 02 03 04 05
Fixes: e057dd3fc20f ("can: add ISO 15765-2:2016 transport protocol") Link: https://lore.kernel.org/r/20210218215434.1708249-2-mkl@pengutronix.de Cc: Oliver Hartkopp socketcan@hartkopp.net Signed-off-by: Marc Kleine-Budde mkl@pengutronix.de Signed-off-by: Sasha Levin sashal@kernel.org --- net/can/isotp.c | 9 +++------ 1 file changed, 3 insertions(+), 6 deletions(-)
diff --git a/net/can/isotp.c b/net/can/isotp.c index a9b96a6e6317..b01662d2f2cd 100644 --- a/net/can/isotp.c +++ b/net/can/isotp.c @@ -215,8 +215,7 @@ static int isotp_send_fc(struct sock *sk, int ae, u8 flowstatus) if (ae) ncf->data[0] = so->opt.ext_address;
- if (so->ll.mtu == CANFD_MTU) - ncf->flags = so->ll.tx_flags; + ncf->flags = so->ll.tx_flags;
can_send_ret = can_send(nskb, 1); if (can_send_ret) @@ -790,8 +789,7 @@ isotp_tx_burst: so->tx.sn %= 16; so->tx.bs++;
- if (so->ll.mtu == CANFD_MTU) - cf->flags = so->ll.tx_flags; + cf->flags = so->ll.tx_flags;
skb->dev = dev; can_skb_set_owner(skb, sk); @@ -934,8 +932,7 @@ static int isotp_sendmsg(struct socket *sock, struct msghdr *msg, size_t size) }
/* send the first or only CAN frame */ - if (so->ll.mtu == CANFD_MTU) - cf->flags = so->ll.tx_flags; + cf->flags = so->ll.tx_flags;
skb->dev = dev; skb->sk = sk;