mac802154: correct max sifs size handling

This patch fix the max sifs size correction when the
IEEE802154_HW_TX_OMIT_CKSUM flag is set. With this flag the sk_buff
doesn't contain the CRC, because the transceiver will add the CRC
while transmit.

Also add some defines for the max sifs frame size value and frame check
sequence according to 802.15.4 standard.

Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Acked-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/include/linux/ieee802154.h b/include/linux/ieee802154.h
index 40b0ab953937..8872ca103d06 100644
--- a/include/linux/ieee802154.h
+++ b/include/linux/ieee802154.h
@@ -30,6 +30,7 @@
 #define IEEE802154_MTU                  127
 #define IEEE802154_ACK_PSDU_LEN         5
 #define IEEE802154_MIN_PSDU_LEN         9
+#define IEEE802154_FCS_LEN              2
 
 #define IEEE802154_PAN_ID_BROADCAST     0xffff
 #define IEEE802154_ADDR_SHORT_BROADCAST 0xffff
@@ -39,6 +40,7 @@
 
 #define IEEE802154_LIFS_PERIOD          40
 #define IEEE802154_SIFS_PERIOD          12
+#define IEEE802154_MAX_SIFS_FRAME_SIZE  18
 
 #define IEEE802154_MAX_CHANNEL          26
 #define IEEE802154_MAX_PAGE             31