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authorAlexander Aring <alex.aring@gmail.com>2015-05-22 17:43:53 +0200
committerMarcel Holtmann <marcel@holtmann.org>2015-05-23 17:57:08 +0200
commit344f8c119df742f2bf7098cf8fc326351f583249 (patch)
tree032162247fc24529b2809f4e3a914e66ef836400 /net/mac802154
parent4a3a8c0c3a613e481bea931f0d65dc4a7efaa9b9 (diff)
downloadlinux-stericsson-344f8c119df742f2bf7098cf8fc326351f583249.tar.gz
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')
-rw-r--r--net/mac802154/ieee802154_i.h1
-rw-r--r--net/mac802154/iface.c9
-rw-r--r--net/mac802154/mac_cmd.c1
-rw-r--r--net/mac802154/mib.c9
4 files changed, 6 insertions, 14 deletions
diff --git a/net/mac802154/ieee802154_i.h b/net/mac802154/ieee802154_i.h
index 127ba18386fc..56b3847466e9 100644
--- a/net/mac802154/ieee802154_i.h
+++ b/net/mac802154/ieee802154_i.h
@@ -141,7 +141,6 @@ __le16 mac802154_dev_get_short_addr(const struct net_device *dev);
__le16 mac802154_dev_get_pan_id(const struct net_device *dev);
void mac802154_dev_set_pan_id(struct net_device *dev, __le16 val);
void mac802154_dev_set_page_channel(struct net_device *dev, u8 page, u8 chan);
-u8 mac802154_dev_get_dsn(const struct net_device *dev);
int mac802154_get_params(struct net_device *dev,
struct ieee802154_llsec_params *params);
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;
diff --git a/net/mac802154/mac_cmd.c b/net/mac802154/mac_cmd.c
index 6dcbb3b5994c..3b347d4d3d4c 100644
--- a/net/mac802154/mac_cmd.c
+++ b/net/mac802154/mac_cmd.c
@@ -153,7 +153,6 @@ struct ieee802154_mlme_ops mac802154_mlme_wpan = {
.start_req = mac802154_mlme_start_req,
.get_pan_id = mac802154_dev_get_pan_id,
.get_short_addr = mac802154_dev_get_short_addr,
- .get_dsn = mac802154_dev_get_dsn,
.llsec = &mac802154_llsec_ops,
diff --git a/net/mac802154/mib.c b/net/mac802154/mib.c
index 033dfc7755c6..00a62de9cc23 100644
--- a/net/mac802154/mib.c
+++ b/net/mac802154/mib.c
@@ -76,15 +76,6 @@ void mac802154_dev_set_pan_id(struct net_device *dev, __le16 val)
spin_unlock_bh(&sdata->mib_lock);
}
-u8 mac802154_dev_get_dsn(const struct net_device *dev)
-{
- struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
-
- BUG_ON(dev->type != ARPHRD_IEEE802154);
-
- return sdata->wpan_dev.dsn++;
-}
-
void mac802154_dev_set_page_channel(struct net_device *dev, u8 page, u8 chan)
{
struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);