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| author | Oliver Hartkopp <socketcan@hartkopp.net> | 2012-06-13 20:04:33 +0200 |
|---|---|---|
| committer | Marc Kleine-Budde <mkl@pengutronix.de> | 2012-06-19 21:39:50 +0200 |
| commit | 7c9416365c60f150ef8961a2855fafbc7394ad6b (patch) | |
| tree | 56af7e0eb5ad94c6da14ff7dde79935eb58628a5 /net/can | |
| parent | c_can_pci: generic module for C_CAN/D_CAN on PCI (diff) | |
| download | linux-7c9416365c60f150ef8961a2855fafbc7394ad6b.tar.xz linux-7c9416365c60f150ef8961a2855fafbc7394ad6b.zip | |
canfd: add new data structures and constants
- add new struct canfd_frame
- check identical element offsets in struct can_frame and struct canfd_frame
- new ETH_P_CANFD definition to tag CAN FD skbs correctly
- add CAN_MTU and CANFD_MTU definitions for easy frame and mode detection
- add CAN[FD]_MAX_[DLC|DLEN] helper constants to remove hard coded values
- update existing struct can_frame with helper constants and comments
Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Diffstat (limited to 'net/can')
| -rw-r--r-- | net/can/af_can.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/net/can/af_can.c b/net/can/af_can.c index 6efcd37b4bd0..c96140a1458e 100644 --- a/net/can/af_can.c +++ b/net/can/af_can.c @@ -41,6 +41,7 @@ */ #include <linux/module.h> +#include <linux/stddef.h> #include <linux/init.h> #include <linux/kmod.h> #include <linux/slab.h> @@ -824,6 +825,12 @@ static struct notifier_block can_netdev_notifier __read_mostly = { static __init int can_init(void) { + /* check for correct padding to be able to use the structs similarly */ + BUILD_BUG_ON(offsetof(struct can_frame, can_dlc) != + offsetof(struct canfd_frame, len) || + offsetof(struct can_frame, data) != + offsetof(struct canfd_frame, data)); + printk(banner); memset(&can_rx_alldev_list, 0, sizeof(can_rx_alldev_list)); |