diff options
| -rw-r--r-- | net/mac80211/agg-tx.c | 95 |
1 files changed, 48 insertions, 47 deletions
diff --git a/net/mac80211/agg-tx.c b/net/mac80211/agg-tx.c index 61bb7db04808..a49b76f61da3 100644 --- a/net/mac80211/agg-tx.c +++ b/net/mac80211/agg-tx.c @@ -123,6 +123,34 @@ void ieee80211_send_bar(struct ieee80211_sub_if_data *sdata, u8 *ra, u16 tid, u1 ieee80211_tx_skb(sdata, skb, 0); } +static int __ieee80211_stop_tx_ba_session(struct ieee80211_local *local, + struct sta_info *sta, u16 tid, + enum ieee80211_back_parties initiator) +{ + int ret; + u8 *state; + + state = &sta->ampdu_mlme.tid_state_tx[tid]; + + if (local->hw.ampdu_queues) + ieee80211_stop_queue(&local->hw, sta->tid_to_tx_q[tid]); + + *state = HT_AGG_STATE_REQ_STOP_BA_MSK | + (initiator << HT_AGG_STATE_INITIATOR_SHIFT); + + ret = local->ops->ampdu_action(&local->hw, IEEE80211_AMPDU_TX_STOP, + &sta->sta, tid, NULL); + + /* HW shall not deny going back to legacy */ + if (WARN_ON(ret)) { + *state = HT_AGG_STATE_OPERATIONAL; + if (local->hw.ampdu_queues) + ieee80211_wake_queue(&local->hw, sta->tid_to_tx_q[tid]); + } + + return ret; +} + /* * After sending add Block Ack request we activated a timer until * add Block Ack response will arrive from the recipient. @@ -135,23 +163,13 @@ static void sta_addba_resp_timer_expired(unsigned long data) * flow in sta_info_create gives the TID as data, while the timer_to_id * array gives the sta through container_of */ u16 tid = *(u8 *)data; - struct sta_info *temp_sta = container_of((void *)data, + struct sta_info *sta = container_of((void *)data, struct sta_info, timer_to_tid[tid]); - - struct ieee80211_local *local = temp_sta->local; - struct ieee80211_hw *hw = &local->hw; - struct sta_info *sta; + struct ieee80211_local *local = sta->local; u8 *state; - rcu_read_lock(); - - sta = sta_info_get(local, temp_sta->sta.addr); - if (!sta) { - rcu_read_unlock(); - return; - } - state = &sta->ampdu_mlme.tid_state_tx[tid]; + /* check if the TID waits for addBA response */ spin_lock_bh(&sta->lock); if (!(*state & HT_ADDBA_REQUESTED_MSK)) { @@ -161,21 +179,15 @@ static void sta_addba_resp_timer_expired(unsigned long data) printk(KERN_DEBUG "timer expired on tid %d but we are not " "expecting addBA response there", tid); #endif - goto timer_expired_exit; + return; } #ifdef CONFIG_MAC80211_HT_DEBUG printk(KERN_DEBUG "addBA response timer expired on tid %d\n", tid); #endif - /* go through the state check in stop_BA_session */ - *state = HT_AGG_STATE_OPERATIONAL; + __ieee80211_stop_tx_ba_session(local, sta, tid, WLAN_BACK_INITIATOR); spin_unlock_bh(&sta->lock); - ieee80211_stop_tx_ba_session(hw, temp_sta->sta.addr, tid, - WLAN_BACK_INITIATOR); - -timer_expired_exit: - rcu_read_unlock(); } int ieee80211_start_tx_ba_session(struct ieee80211_hw *hw, u8 *ra, u16 tid) @@ -187,6 +199,9 @@ int ieee80211_start_tx_ba_session(struct ieee80211_hw *hw, u8 *ra, u16 tid) u8 *state; int ret = 0; + if (WARN_ON(!local->ops->ampdu_action)) + return -EINVAL; + if ((tid >= STA_TID_NUM) || !(hw->flags & IEEE80211_HW_AMPDU_AGGREGATION)) return -EINVAL; @@ -280,9 +295,8 @@ int ieee80211_start_tx_ba_session(struct ieee80211_hw *hw, u8 *ra, u16 tid) /* This is slightly racy because the queue isn't stopped */ start_seq_num = sta->tid_seq[tid]; - if (local->ops->ampdu_action) - ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_TX_START, - &sta->sta, tid, &start_seq_num); + ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_TX_START, + &sta->sta, tid, &start_seq_num); if (ret) { /* No need to requeue the packets in the agg queue, since we @@ -423,6 +437,9 @@ int ieee80211_stop_tx_ba_session(struct ieee80211_hw *hw, u8 *state; int ret = 0; + if (WARN_ON(!local->ops->ampdu_action)) + return -EINVAL; + if (tid >= STA_TID_NUM) return -EINVAL; @@ -439,7 +456,7 @@ int ieee80211_stop_tx_ba_session(struct ieee80211_hw *hw, if (*state != HT_AGG_STATE_OPERATIONAL) { ret = -ENOENT; - goto stop_BA_exit; + goto unlock; } #ifdef CONFIG_MAC80211_HT_DEBUG @@ -447,27 +464,13 @@ int ieee80211_stop_tx_ba_session(struct ieee80211_hw *hw, ra, tid); #endif /* CONFIG_MAC80211_HT_DEBUG */ - if (hw->ampdu_queues) - ieee80211_stop_queue(hw, sta->tid_to_tx_q[tid]); - - *state = HT_AGG_STATE_REQ_STOP_BA_MSK | - (initiator << HT_AGG_STATE_INITIATOR_SHIFT); + ret = __ieee80211_stop_tx_ba_session(local, sta, tid, initiator); - if (local->ops->ampdu_action) - ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_TX_STOP, - &sta->sta, tid, NULL); - - /* HW shall not deny going back to legacy */ - if (WARN_ON(ret)) { - *state = HT_AGG_STATE_OPERATIONAL; - if (hw->ampdu_queues) - ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]); - goto stop_BA_exit; - } - -stop_BA_exit: + unlock: spin_unlock_bh(&sta->lock); + rcu_read_unlock(); + return ret; } EXPORT_SYMBOL(ieee80211_stop_tx_ba_session); @@ -623,10 +626,8 @@ void ieee80211_process_addba_resp(struct ieee80211_local *local, spin_unlock_bh(&sta->lock); } else { sta->ampdu_mlme.addba_req_num[tid]++; - /* this will allow the state check in stop_BA_session */ - *state = HT_AGG_STATE_OPERATIONAL; + __ieee80211_stop_tx_ba_session(local, sta, tid, + WLAN_BACK_INITIATOR); spin_unlock_bh(&sta->lock); - ieee80211_stop_tx_ba_session(hw, sta->sta.addr, tid, - WLAN_BACK_INITIATOR); } } |