mac80211: split out aggregation TX removal

Create the function ieee80211_remove_tid_tx to call
it from ___ieee80211_stop_tx_ba_session later.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>

diff --git a/net/mac80211/agg-tx.c b/net/mac80211/agg-tx.c
index e0656d7..101bbfb 100644 (file)
--- a/net/mac80211/agg-tx.c
+++ b/net/mac80211/agg-tx.c
@@ -713,6 +713,35 @@ int ieee80211_stop_tx_ba_session(struct ieee80211_sta *pubsta, u16 tid)
 }
 EXPORT_SYMBOL(ieee80211_stop_tx_ba_session);
 
+static void ieee80211_remove_tid_tx(struct sta_info *sta, int tid)
+{
+       struct tid_ampdu_tx *tid_tx;
+
+       lockdep_assert_held(&sta->ampdu_mlme.mtx);
+       lockdep_assert_held(&sta->lock);
+
+       tid_tx = rcu_dereference_protected_tid_tx(sta, tid);
+
+       /*
+        * When we get here, the TX path will not be lockless any more wrt.
+        * aggregation, since the OPERATIONAL bit has long been cleared.
+        * Thus it will block on getting the lock, if it occurs. So if we
+        * stop the queue now, we will not get any more packets, and any
+        * that might be being processed will wait for us here, thereby
+        * guaranteeing that no packets go to the tid_tx pending queue any
+        * more.
+        */
+
+       ieee80211_agg_splice_packets(sta->sdata, tid_tx, tid);
+
+       /* future packets must not find the tid_tx struct any more */
+       ieee80211_assign_tid_tx(sta, tid, NULL);
+
+       ieee80211_agg_splice_finish(sta->sdata, tid);
+
+       kfree_rcu(tid_tx, rcu_head);
+}
+
 void ieee80211_stop_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u8 tid)
 {
        struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
@@ -751,24 +780,7 @@ void ieee80211_stop_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u8 tid)
                ieee80211_send_delba(sta->sdata, ra, tid,
                        WLAN_BACK_INITIATOR, WLAN_REASON_QSTA_NOT_USE);
 
-       /*
-        * When we get here, the TX path will not be lockless any more wrt.
-        * aggregation, since the OPERATIONAL bit has long been cleared.
-        * Thus it will block on getting the lock, if it occurs. So if we
-        * stop the queue now, we will not get any more packets, and any
-        * that might be being processed will wait for us here, thereby
-        * guaranteeing that no packets go to the tid_tx pending queue any
-        * more.
-        */
-
-       ieee80211_agg_splice_packets(sta->sdata, tid_tx, tid);
-
-       /* future packets must not find the tid_tx struct any more */
-       ieee80211_assign_tid_tx(sta, tid, NULL);
-
-       ieee80211_agg_splice_finish(sta->sdata, tid);
-
-       kfree_rcu(tid_tx, rcu_head);
+       ieee80211_remove_tid_tx(sta, tid);
 
  unlock_sta:
        spin_unlock_bh(&sta->lock);