From 722f069a6dc95d7c6c2cdfbe3413899a3b768f9c Mon Sep 17 00:00:00 2001 From: Sujith Date: Tue, 17 Mar 2009 08:50:06 +0530 Subject: mac80211: Tear down aggregation sessions for suspend/resume When the driver has been notified with a STA_REMOVE, it tears down the internal ADDBA state. On resume, trying to initiate aggregation would fail because mac80211 has not cleared the operational state for that . This can be fixed by tearing down the existing sessions on a suspend. Also, the driver can initiate a new BA session when suspend is in progress. This is fixed by marking the station as being in suspend state and denying ADDBA requests for such STAs. Signed-off-by: Sujith Acked-by: Johannes Berg Signed-off-by: John W. Linville --- net/mac80211/pm.c | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) (limited to 'net/mac80211/pm.c') diff --git a/net/mac80211/pm.c b/net/mac80211/pm.c index ef7be1ce2c8..1e6152ac677 100644 --- a/net/mac80211/pm.c +++ b/net/mac80211/pm.c @@ -21,6 +21,19 @@ int __ieee80211_suspend(struct ieee80211_hw *hw) list_for_each_entry(sdata, &local->interfaces, list) ieee80211_disable_keys(sdata); + /* Tear down aggregation sessions */ + + rcu_read_lock(); + + if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) { + list_for_each_entry_rcu(sta, &local->sta_list, list) { + set_sta_flags(sta, WLAN_STA_SUSPEND); + ieee80211_sta_tear_down_BA_sessions(sta); + } + } + + rcu_read_unlock(); + /* remove STAs */ if (local->ops->sta_notify) { spin_lock_irqsave(&local->sta_lock, flags); @@ -102,6 +115,18 @@ int __ieee80211_resume(struct ieee80211_hw *hw) spin_unlock_irqrestore(&local->sta_lock, flags); } + /* Clear Suspend state so that ADDBA requests can be processed */ + + rcu_read_lock(); + + if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) { + list_for_each_entry_rcu(sta, &local->sta_list, list) { + clear_sta_flags(sta, WLAN_STA_SUSPEND); + } + } + + rcu_read_unlock(); + /* add back keys */ list_for_each_entry(sdata, &local->interfaces, list) if (netif_running(sdata->dev)) -- cgit v1.2.3