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can: rename get_can_dlc() macro with can_cc_dlc2len()

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The get_can_dlc() macro is used to ensure the payload length information of
the Classical CAN frame to be max 8 bytes (the CAN_MAX_DLEN).

Rename the macro and use the correct constant in preparation of the len/dlc
cleanup for Classical CAN frames.

Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net>
Link: https://lore.kernel.org/r/20201110101852.1973-3-socketcan@hartkopp.net
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
This commit is contained in:
Oliver Hartkopp
2020-11-10 11:18:46 +01:00
committed by Marc Kleine-Budde
parent ea7800565a
commit 69d98969a0
32 changed files with 45 additions and 45 deletions
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8
include/linux/can/dev.h
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@@ -98,14 +98,14 @@ static inline unsigned int can_bit_time(const struct can_bittiming *bt)
}
/*
* get_can_dlc(value) - helper macro to cast a given data length code (dlc)
* to u8 and ensure the dlc value to be max. 8 bytes.
* can_cc_dlc2len(value) - convert a given data length code (dlc) of a
* Classical CAN frame into a valid data length of max. 8 bytes.
*
* To be used in the CAN netdriver receive path to ensure conformance with
* ISO 11898-1 Chapter 8.4.2.3 (DLC field)
*/
#define get_can_dlc(i) (min_t(u8, (i), CAN_MAX_DLC))
#define get_canfd_dlc(i) (min_t(u8, (i), CANFD_MAX_DLC))
#define can_cc_dlc2len(dlc) (min_t(u8, (dlc), CAN_MAX_DLEN))
#define get_canfd_dlc(dlc) (min_t(u8, (dlc), CANFD_MAX_DLC))
/* Check for outgoing skbs that have not been created by the CAN subsystem */
static inline bool can_skb_headroom_valid(struct net_device *dev,