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authorJohannes Berg <johannes@sipsolutions.net>2009-11-16 23:20:41 +0100
committerJohn W. Linville <linville@tuxdriver.com>2009-11-18 17:09:18 -0500
commitd84f323477260e773d5317ad7cbe50f76115cb47 (patch)
tree815047721ed953ab2b39aa606f95cee646fc5be6 /net
parent5f0b7de59fae1e57b2481c9756cd4a0f6308530f (diff)
mac80211: remove dev_hold/put calls
If we move the rcu sections a little, there's no need to touch the device refcount. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'net')
-rw-r--r--net/mac80211/tx.c16
1 files changed, 5 insertions, 11 deletions
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index 3ad053f6de1..375cecc837a 100644
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -1430,8 +1430,6 @@ static void ieee80211_xmit(struct ieee80211_sub_if_data *sdata,
int headroom;
bool may_encrypt;
- dev_hold(sdata->dev);
-
if (need_dynamic_ps(local)) {
if (local->hw.conf.flags & IEEE80211_CONF_PS) {
ieee80211_stop_queues_by_reason(&local->hw,
@@ -1446,6 +1444,8 @@ static void ieee80211_xmit(struct ieee80211_sub_if_data *sdata,
info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
+ rcu_read_lock();
+
if (unlikely(sdata->vif.type == NL80211_IFTYPE_MONITOR)) {
int hdrlen;
u16 len_rthdr;
@@ -1468,7 +1468,6 @@ static void ieee80211_xmit(struct ieee80211_sub_if_data *sdata,
* support we will need a different mechanism.
*/
- rcu_read_lock();
list_for_each_entry_rcu(tmp_sdata, &local->interfaces,
list) {
if (!netif_running(tmp_sdata->dev))
@@ -1477,13 +1476,10 @@ static void ieee80211_xmit(struct ieee80211_sub_if_data *sdata,
continue;
if (compare_ether_addr(tmp_sdata->dev->dev_addr,
hdr->addr2) == 0) {
- dev_hold(tmp_sdata->dev);
- dev_put(sdata->dev);
sdata = tmp_sdata;
break;
}
}
- rcu_read_unlock();
}
}
@@ -1497,7 +1493,7 @@ static void ieee80211_xmit(struct ieee80211_sub_if_data *sdata,
if (ieee80211_skb_resize(local, skb, headroom, may_encrypt)) {
dev_kfree_skb(skb);
- dev_put(sdata->dev);
+ rcu_read_unlock();
return;
}
@@ -1508,13 +1504,13 @@ static void ieee80211_xmit(struct ieee80211_sub_if_data *sdata,
!is_multicast_ether_addr(hdr->addr1))
if (mesh_nexthop_lookup(skb, sdata)) {
/* skb queued: don't free */
- dev_put(sdata->dev);
+ rcu_read_unlock();
return;
}
ieee80211_select_queue(local, skb);
ieee80211_tx(sdata, skb, false);
- dev_put(sdata->dev);
+ rcu_read_unlock();
}
netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb,
@@ -1964,12 +1960,10 @@ void ieee80211_tx_pending(unsigned long data)
}
sdata = vif_to_sdata(info->control.vif);
- dev_hold(sdata->dev);
spin_unlock_irqrestore(&local->queue_stop_reason_lock,
flags);
txok = ieee80211_tx_pending_skb(local, skb);
- dev_put(sdata->dev);
if (!txok)
__skb_queue_head(&local->pending[i], skb);
spin_lock_irqsave(&local->queue_stop_reason_lock,