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| author | Oliver Hartkopp <socketcan@hartkopp.net> | 2022-09-12 19:07:21 +0200 |
|---|---|---|
| committer | Marc Kleine-Budde <mkl@pengutronix.de> | 2022-09-15 09:08:08 +0200 |
| commit | 061834624c87282c6d9d8c5395aaff4380e5e1fc (patch) | |
| tree | 127af90c12a53abfe949aebd13847cee1dea3f2c /net/can/af_can.c | |
| parent | 467ef4c7b9d1c22ee64342804bf92549d765df14 (diff) | |
| download | linux-061834624c87282c6d9d8c5395aaff4380e5e1fc.tar.gz linux-061834624c87282c6d9d8c5395aaff4380e5e1fc.tar.bz2 linux-061834624c87282c6d9d8c5395aaff4380e5e1fc.zip | |
can: set CANFD_FDF flag in all CAN FD frame structures
To simplify the testing in user space all struct canfd_frame's provided by
the CAN subsystem of the Linux kernel now have the CANFD_FDF flag set in
canfd_frame::flags.
NB: Handcrafted ETH_P_CANFD frames introduced via PF_PACKET socket might
not set this bit correctly. During the check for sufficient headroom in
PF_PACKET sk_buffs the uninitialized CAN sk_buff data structures are filled.
In the case of a CAN FD frame the CANFD_FDF flag is set accordingly.
As the CAN frame content is already zero initialized in alloc_canfd_skb()
the obsolete initialization of cf->flags in the CTU CAN FD driver has been
removed as it would overwrite the already set CANFD_FDF flag.
Acked-by: Vincent Mailhol <mailhol.vincent@wanadoo.fr>
Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net>
Link: https://lore.kernel.org/all/20220912170725.120748-4-socketcan@hartkopp.net
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Diffstat (limited to 'net/can/af_can.c')
| -rw-r--r-- | net/can/af_can.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/net/can/af_can.c b/net/can/af_can.c index afa6c2151bc4..072a6a5c9dd1 100644 --- a/net/can/af_can.c +++ b/net/can/af_can.c @@ -205,7 +205,12 @@ int can_send(struct sk_buff *skb, int loop) if (can_is_can_skb(skb)) { skb->protocol = htons(ETH_P_CAN); } else if (can_is_canfd_skb(skb)) { + struct canfd_frame *cfd = (struct canfd_frame *)skb->data; + skb->protocol = htons(ETH_P_CANFD); + + /* set CAN FD flag for CAN FD frames by default */ + cfd->flags |= CANFD_FDF; } else { goto inval_skb; } |