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can: dev: add can_is_canfd_skb() API

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The CAN device drivers can use can_is_canfd_skb() to check if the frame to send
is on CAN FD mode or normal CAN mode.

Acked-by: Oliver Hartkopp <socketcan@hartkopp.net>
Signed-off-by: Dong Aisheng <b29396@freescale.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
This commit is contained in:
Dong Aisheng 2014-11-07 16:45:12 +08:00 committed by Marc Kleine-Budde
parent 67b5909edc
commit 98e69016a1
1 changed files with 6 additions and 0 deletions
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6
include/linux/can/dev.h
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@ -99,6 +99,12 @@ static inline int can_dropped_invalid_skb(struct net_device *dev,
return 1;
}
static inline bool can_is_canfd_skb(const struct sk_buff *skb)
{
/* the CAN specific type of skb is identified by its data length */
return skb->len == CANFD_MTU;
}
/* get data length from can_dlc with sanitized can_dlc */
u8 can_dlc2len(u8 can_dlc);