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| author | Alexander Aring <alex.aring@gmail.com> | 2015-03-04 21:19:59 +0100 |
|---|---|---|
| committer | Marcel Holtmann <marcel@holtmann.org> | 2015-03-14 17:11:30 +0100 |
| commit | 3f3c4bb5ec7c645d1151e1e8d6e56c71a050cf85 (patch) | |
| tree | 65b5dff1a80792cd74d3f29a05f2dd61bc51264e /net/mac802154/util.c | |
| parent | 022d07e3d89157bf787e462bbce7b9ed47c3b563 (diff) | |
| download | lwn-3f3c4bb5ec7c645d1151e1e8d6e56c71a050cf85.tar.gz lwn-3f3c4bb5ec7c645d1151e1e8d6e56c71a050cf85.zip | |
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>
Diffstat (limited to 'net/mac802154/util.c')
| -rw-r--r-- | net/mac802154/util.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/net/mac802154/util.c b/net/mac802154/util.c index 5fc979027919..150bf807e572 100644 --- a/net/mac802154/util.c +++ b/net/mac802154/util.c @@ -65,8 +65,19 @@ void ieee802154_xmit_complete(struct ieee802154_hw *hw, struct sk_buff *skb, { if (ifs_handling) { struct ieee802154_local *local = hw_to_local(hw); + u8 max_sifs_size; - if (skb->len > 18) + /* If transceiver sets CRC on his own we need to use lifs + * threshold len above 16 otherwise 18, because it's not + * part of skb->len. + */ + if (hw->flags & IEEE802154_HW_TX_OMIT_CKSUM) + max_sifs_size = IEEE802154_MAX_SIFS_FRAME_SIZE - + IEEE802154_FCS_LEN; + else + max_sifs_size = IEEE802154_MAX_SIFS_FRAME_SIZE; + + if (skb->len > max_sifs_size) hrtimer_start(&local->ifs_timer, ktime_set(0, hw->phy->lifs_period * NSEC_PER_USEC), HRTIMER_MODE_REL); |