diff options
| author | Alexander Aring <alex.aring@gmail.com> | 2015-05-22 17:43:53 +0200 |
|---|---|---|
| committer | Marcel Holtmann <marcel@holtmann.org> | 2015-05-23 17:57:08 +0200 |
| commit | 344f8c119df742f2bf7098cf8fc326351f583249 (patch) | |
| tree | 032162247fc24529b2809f4e3a914e66ef836400 /net/mac802154/iface.c | |
| parent | 4a3a8c0c3a613e481bea931f0d65dc4a7efaa9b9 (diff) | |
| download | linux-344f8c119df742f2bf7098cf8fc326351f583249.tar.bz2 | |
mac802154: use atomic ops for sequence incrementation
This patch will use atomic operations for sequence number incrementation
while MAC header generation. Upper layers like af_802154 or 6LoWPAN
could call this function in a parallel context while generating 802.15.4
MAC header before queuing into wpan interfaces transmit queue.
Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Reviewed-by: Stefan Schmidt <stefan@osg.samsung.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Diffstat (limited to 'net/mac802154/iface.c')
| -rw-r--r-- | net/mac802154/iface.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/net/mac802154/iface.c b/net/mac802154/iface.c index 22f478be7489..0ec7bc402e29 100644 --- a/net/mac802154/iface.c +++ b/net/mac802154/iface.c @@ -368,7 +368,7 @@ static int mac802154_header_create(struct sk_buff *skb, hdr.fc.type = cb->type; hdr.fc.security_enabled = cb->secen; hdr.fc.ack_request = cb->ackreq; - hdr.seq = ieee802154_mlme_ops(dev)->get_dsn(dev); + hdr.seq = atomic_inc_return(&dev->ieee802154_ptr->dsn) & 0xFF; if (mac802154_set_header_security(sdata, &hdr, cb) < 0) return -EINVAL; @@ -468,13 +468,16 @@ ieee802154_setup_sdata(struct ieee802154_sub_if_data *sdata, enum nl802154_iftype type) { struct wpan_dev *wpan_dev = &sdata->wpan_dev; + u8 tmp; /* set some type-dependent values */ sdata->vif.type = type; sdata->wpan_dev.iftype = type; - get_random_bytes(&wpan_dev->bsn, 1); - get_random_bytes(&wpan_dev->dsn, 1); + get_random_bytes(&tmp, sizeof(tmp)); + atomic_set(&wpan_dev->bsn, tmp); + get_random_bytes(&tmp, sizeof(tmp)); + atomic_set(&wpan_dev->dsn, tmp); /* defaults per 802.15.4-2011 */ wpan_dev->min_be = 3; |