From 74e2bd1fa3ae9695af566ad5a7a288898787b909 Mon Sep 17 00:00:00 2001 From: Wey-Yi Guy Date: Wed, 3 Feb 2010 09:28:55 -0800 Subject: [PATCH] mac80211: tear down all agg queues when restart/reconfig hw When there is a need to restart/reconfig hw, tear down all the aggregation queues and let the mac80211 and driver get in-sync to have the opportunity to re-establish the aggregation queues again. Need to wait until driver re-establish all the station information before tear down the aggregation queues, driver(at least iwlwifi driver) will reject the stop aggregation queue request if station is not ready. But also need to make sure the aggregation queues are tear down before waking up the queues, so mac80211 will not sending frames with aggregation bit set. Signed-off-by: Wey-Yi Guy Signed-off-by: John W. Linville --- net/mac80211/util.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/net/mac80211/util.c b/net/mac80211/util.c index 3af439a85b33..c453226f06b2 100644 --- a/net/mac80211/util.c +++ b/net/mac80211/util.c @@ -1178,6 +1178,14 @@ int ieee80211_reconfig(struct ieee80211_local *local) } } + rcu_read_lock(); + if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) { + list_for_each_entry_rcu(sta, &local->sta_list, list) { + ieee80211_sta_tear_down_BA_sessions(sta); + } + } + rcu_read_unlock(); + /* add back keys */ list_for_each_entry(sdata, &local->interfaces, list) if (ieee80211_sdata_running(sdata))