From: Johannes Berg Date: Thu, 10 Jun 2010 08:21:47 +0000 (+0200) Subject: mac80211: defer TX agg session teardown to work X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=83a5cbf73a13d0c8be019b22afec4407e4285aed;p=openwrt%2Fstaging%2Fblogic.git mac80211: defer TX agg session teardown to work Since we want the code to be able to sleep in the future, it must not be called from the timer directly. To achieve that, simply call the function drivers would call, and also use RCU in the timer to get the struct so we don't need to rely on the spinlock in the future. Signed-off-by: Johannes Berg Signed-off-by: John W. Linville --- diff --git a/net/mac80211/agg-tx.c b/net/mac80211/agg-tx.c index 9a00a79a868b..0026604cfe30 100644 --- a/net/mac80211/agg-tx.c +++ b/net/mac80211/agg-tx.c @@ -200,11 +200,11 @@ static void sta_addba_resp_timer_expired(unsigned long data) struct tid_ampdu_tx *tid_tx; /* check if the TID waits for addBA response */ - spin_lock_bh(&sta->lock); - tid_tx = sta->ampdu_mlme.tid_tx[tid]; + rcu_read_lock(); + tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]); if (!tid_tx || test_bit(HT_AGG_STATE_RESPONSE_RECEIVED, &tid_tx->state)) { - spin_unlock_bh(&sta->lock); + rcu_read_unlock(); #ifdef CONFIG_MAC80211_HT_DEBUG printk(KERN_DEBUG "timer expired on tid %d but we are not " "(or no longer) expecting addBA response there\n", @@ -217,8 +217,8 @@ static void sta_addba_resp_timer_expired(unsigned long data) printk(KERN_DEBUG "addBA response timer expired on tid %d\n", tid); #endif - ___ieee80211_stop_tx_ba_session(sta, tid, WLAN_BACK_INITIATOR); - spin_unlock_bh(&sta->lock); + ieee80211_stop_tx_ba_session(&sta->sta, tid); + rcu_read_unlock(); } static inline int ieee80211_ac_from_tid(int tid)