diff options
author | Marc Kleine-Budde <mkl@pengutronix.de> | 2021-02-18 23:24:20 +0300 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-03-30 15:31:59 +0300 |
commit | 3b3d9279be6c74633132280d0d167ec9694dea41 (patch) | |
tree | b6e933dffafc0f66fa7941a0c14b535c415ffb7c /net/can | |
parent | f88517dae95bc4811739b66ffbc652101e6ba7e7 (diff) | |
download | linux-3b3d9279be6c74633132280d0d167ec9694dea41.tar.xz |
can: isotp: TX-path: ensure that CAN frame flags are initialized
[ 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>
Diffstat (limited to 'net/can')
-rw-r--r-- | net/can/isotp.c | 9 |
1 files 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; |