From: Wey-Yi Guy Date: Wed, 3 Feb 2010 17:28:55 +0000 (-0800) Subject: mac80211: tear down all agg queues when restart/reconfig hw X-Git-Tag: firefly_0821_release~10186^2~1879 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=a850f39d86b2fa5a0933ccd6c8e91e9e86d62937;p=firefly-linux-kernel-4.4.55.git mac80211: tear down all agg queues when restart/reconfig hw commit 74e2bd1fa3ae9695af566ad5a7a288898787b909 upstream. 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 Signed-off-by: Greg Kroah-Hartman --- diff --git a/net/mac80211/util.c b/net/mac80211/util.c index 6a97c76036c8..31b10850905f 100644 --- a/net/mac80211/util.c +++ b/net/mac80211/util.c @@ -1137,6 +1137,14 @@ 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 (netif_running(sdata->dev))