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-rw-r--r--net/mac80211/agg-tx.c94
-rw-r--r--net/mac80211/driver-ops.h3
-rw-r--r--net/mac80211/ht.c8
3 files changed, 58 insertions, 47 deletions
diff --git a/net/mac80211/agg-tx.c b/net/mac80211/agg-tx.c
index 0026604..5dff73e 100644
--- a/net/mac80211/agg-tx.c
+++ b/net/mac80211/agg-tx.c
@@ -6,7 +6,7 @@
* Copyright 2005-2006, Devicescape Software, Inc.
* Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
* Copyright 2007, Michael Wu <flamingice@sourmilk.net>
- * Copyright 2007-2009, Intel Corporation
+ * Copyright 2007-2010, Intel Corporation
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
@@ -140,18 +140,23 @@ int ___ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
struct tid_ampdu_tx *tid_tx = sta->ampdu_mlme.tid_tx[tid];
int ret;
- lockdep_assert_held(&sta->lock);
+ lockdep_assert_held(&sta->ampdu_mlme.mtx);
- if (WARN_ON(!tid_tx))
+ if (!tid_tx)
return -ENOENT;
+ spin_lock_bh(&sta->lock);
+
if (test_bit(HT_AGG_STATE_WANT_START, &tid_tx->state)) {
/* not even started yet! */
rcu_assign_pointer(sta->ampdu_mlme.tid_tx[tid], NULL);
+ spin_unlock_bh(&sta->lock);
call_rcu(&tid_tx->rcu_head, kfree_tid_tx);
return 0;
}
+ spin_unlock_bh(&sta->lock);
+
#ifdef CONFIG_MAC80211_HT_DEBUG
printk(KERN_DEBUG "Tx BA session stop requested for %pM tid %u\n",
sta->sta.addr, tid);
@@ -269,6 +274,8 @@ void ieee80211_tx_ba_session_handle_start(struct sta_info *sta, int tid)
u16 start_seq_num;
int ret;
+ lockdep_assert_held(&sta->ampdu_mlme.mtx);
+
/*
* While we're asking the driver about the aggregation,
* stop the AC queue so that we don't have to worry
@@ -281,10 +288,11 @@ void ieee80211_tx_ba_session_handle_start(struct sta_info *sta, int tid)
clear_bit(HT_AGG_STATE_WANT_START, &tid_tx->state);
/*
- * This might be off by one due to a race that we can't
- * really prevent here without synchronize_net() which
- * can't be called now.
+ * make sure no packets are being processed to get
+ * valid starting sequence number
*/
+ synchronize_net();
+
start_seq_num = sta->tid_seq[tid] >> 4;
ret = drv_ampdu_action(local, sdata, IEEE80211_AMPDU_TX_START,
@@ -294,7 +302,10 @@ void ieee80211_tx_ba_session_handle_start(struct sta_info *sta, int tid)
printk(KERN_DEBUG "BA request denied - HW unavailable for"
" tid %d\n", tid);
#endif
+ spin_lock_bh(&sta->lock);
rcu_assign_pointer(sta->ampdu_mlme.tid_tx[tid], NULL);
+ spin_unlock_bh(&sta->lock);
+
ieee80211_wake_queue_agg(local, tid);
call_rcu(&tid_tx->rcu_head, kfree_tid_tx);
return;
@@ -309,7 +320,9 @@ void ieee80211_tx_ba_session_handle_start(struct sta_info *sta, int tid)
printk(KERN_DEBUG "activated addBA response timer on tid %d\n", tid);
#endif
+ spin_lock_bh(&sta->lock);
sta->ampdu_mlme.addba_req_num[tid]++;
+ spin_unlock_bh(&sta->lock);
/* send AddBA request */
ieee80211_send_addba_request(sdata, sta->sta.addr, tid,
@@ -445,16 +458,25 @@ ieee80211_agg_splice_finish(struct ieee80211_local *local, u16 tid)
ieee80211_wake_queue_agg(local, tid);
}
-/* caller must hold sta->lock */
static void ieee80211_agg_tx_operational(struct ieee80211_local *local,
struct sta_info *sta, u16 tid)
{
- lockdep_assert_held(&sta->lock);
+ lockdep_assert_held(&sta->ampdu_mlme.mtx);
#ifdef CONFIG_MAC80211_HT_DEBUG
printk(KERN_DEBUG "Aggregation is on for tid %d\n", tid);
#endif
+ drv_ampdu_action(local, sta->sdata,
+ IEEE80211_AMPDU_TX_OPERATIONAL,
+ &sta->sta, tid, NULL);
+
+ /*
+ * synchronize with TX path, while splicing the TX path
+ * should block so it won't put more packets onto pending.
+ */
+ spin_lock_bh(&sta->lock);
+
ieee80211_agg_splice_packets(local, sta->ampdu_mlme.tid_tx[tid], tid);
/*
* Now mark as operational. This will be visible
@@ -464,9 +486,7 @@ static void ieee80211_agg_tx_operational(struct ieee80211_local *local,
set_bit(HT_AGG_STATE_OPERATIONAL, &sta->ampdu_mlme.tid_tx[tid]->state);
ieee80211_agg_splice_finish(local, tid);
- drv_ampdu_action(local, sta->sdata,
- IEEE80211_AMPDU_TX_OPERATIONAL,
- &sta->sta, tid, NULL);
+ spin_unlock_bh(&sta->lock);
}
void ieee80211_start_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u16 tid)
@@ -486,37 +506,35 @@ void ieee80211_start_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u16 tid)
return;
}
- rcu_read_lock();
+ mutex_lock(&local->sta_mtx);
sta = sta_info_get(sdata, ra);
if (!sta) {
- rcu_read_unlock();
+ mutex_unlock(&local->sta_mtx);
#ifdef CONFIG_MAC80211_HT_DEBUG
printk(KERN_DEBUG "Could not find station: %pM\n", ra);
#endif
return;
}
- spin_lock_bh(&sta->lock);
+ mutex_lock(&sta->ampdu_mlme.mtx);
tid_tx = sta->ampdu_mlme.tid_tx[tid];
if (WARN_ON(!tid_tx)) {
#ifdef CONFIG_MAC80211_HT_DEBUG
printk(KERN_DEBUG "addBA was not requested!\n");
#endif
- spin_unlock_bh(&sta->lock);
- rcu_read_unlock();
- return;
+ goto unlock;
}
if (WARN_ON(test_and_set_bit(HT_AGG_STATE_DRV_READY, &tid_tx->state)))
- goto out;
+ goto unlock;
if (test_bit(HT_AGG_STATE_RESPONSE_RECEIVED, &tid_tx->state))
ieee80211_agg_tx_operational(local, sta, tid);
- out:
- spin_unlock_bh(&sta->lock);
- rcu_read_unlock();
+ unlock:
+ mutex_unlock(&sta->ampdu_mlme.mtx);
+ mutex_unlock(&local->sta_mtx);
}
void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_vif *vif,
@@ -548,21 +566,14 @@ EXPORT_SYMBOL(ieee80211_start_tx_ba_cb_irqsafe);
int __ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
enum ieee80211_back_parties initiator)
{
- struct tid_ampdu_tx *tid_tx;
int ret;
- spin_lock_bh(&sta->lock);
- tid_tx = sta->ampdu_mlme.tid_tx[tid];
-
- if (!tid_tx) {
- ret = -ENOENT;
- goto unlock;
- }
+ mutex_lock(&sta->ampdu_mlme.mtx);
ret = ___ieee80211_stop_tx_ba_session(sta, tid, initiator);
- unlock:
- spin_unlock_bh(&sta->lock);
+ mutex_unlock(&sta->ampdu_mlme.mtx);
+
return ret;
}
@@ -627,16 +638,17 @@ void ieee80211_stop_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u8 tid)
ra, tid);
#endif /* CONFIG_MAC80211_HT_DEBUG */
- rcu_read_lock();
+ mutex_lock(&local->sta_mtx);
+
sta = sta_info_get(sdata, ra);
if (!sta) {
#ifdef CONFIG_MAC80211_HT_DEBUG
printk(KERN_DEBUG "Could not find station: %pM\n", ra);
#endif
- rcu_read_unlock();
- return;
+ goto unlock;
}
+ mutex_lock(&sta->ampdu_mlme.mtx);
spin_lock_bh(&sta->lock);
tid_tx = sta->ampdu_mlme.tid_tx[tid];
@@ -644,9 +656,7 @@ void ieee80211_stop_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u8 tid)
#ifdef CONFIG_MAC80211_HT_DEBUG
printk(KERN_DEBUG "unexpected callback to A-MPDU stop\n");
#endif
- spin_unlock_bh(&sta->lock);
- rcu_read_unlock();
- return;
+ goto unlock_sta;
}
if (tid_tx->stop_initiator == WLAN_BACK_INITIATOR)
@@ -672,8 +682,11 @@ void ieee80211_stop_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u8 tid)
call_rcu(&tid_tx->rcu_head, kfree_tid_tx);
+ unlock_sta:
spin_unlock_bh(&sta->lock);
- rcu_read_unlock();
+ mutex_unlock(&sta->ampdu_mlme.mtx);
+ unlock:
+ mutex_unlock(&local->sta_mtx);
}
void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_vif *vif,
@@ -714,10 +727,9 @@ void ieee80211_process_addba_resp(struct ieee80211_local *local,
capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab);
tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
- spin_lock_bh(&sta->lock);
+ mutex_lock(&sta->ampdu_mlme.mtx);
tid_tx = sta->ampdu_mlme.tid_tx[tid];
-
if (!tid_tx)
goto out;
@@ -751,5 +763,5 @@ void ieee80211_process_addba_resp(struct ieee80211_local *local,
}
out:
- spin_unlock_bh(&sta->lock);
+ mutex_unlock(&sta->ampdu_mlme.mtx);
}
diff --git a/net/mac80211/driver-ops.h b/net/mac80211/driver-ops.h
index e5e7ef1..7e86c6f 100644
--- a/net/mac80211/driver-ops.h
+++ b/net/mac80211/driver-ops.h
@@ -349,6 +349,9 @@ static inline int drv_ampdu_action(struct ieee80211_local *local,
u16 *ssn)
{
int ret = -EOPNOTSUPP;
+
+ might_sleep();
+
local_bh_disable();
if (local->ops->ampdu_action)
ret = local->ops->ampdu_action(&local->hw, &sdata->vif, action,
diff --git a/net/mac80211/ht.c b/net/mac80211/ht.c
index e29be64..be928ef 100644
--- a/net/mac80211/ht.c
+++ b/net/mac80211/ht.c
@@ -6,7 +6,7 @@
* Copyright 2005-2006, Devicescape Software, Inc.
* Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
* Copyright 2007, Michael Wu <flamingice@sourmilk.net>
- * Copyright 2007-2008, Intel Corporation
+ * Copyright 2007-2010, Intel Corporation
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
@@ -136,11 +136,7 @@ void ieee80211_ba_session_work(struct work_struct *work)
___ieee80211_stop_rx_ba_session(
sta, tid, WLAN_BACK_RECIPIENT,
WLAN_REASON_QSTA_TIMEOUT);
- }
- mutex_unlock(&sta->ampdu_mlme.mtx);
- spin_lock_bh(&sta->lock);
- for (tid = 0; tid < STA_TID_NUM; tid++) {
tid_tx = sta->ampdu_mlme.tid_tx[tid];
if (!tid_tx)
continue;
@@ -152,7 +148,7 @@ void ieee80211_ba_session_work(struct work_struct *work)
___ieee80211_stop_tx_ba_session(sta, tid,
WLAN_BACK_INITIATOR);
}
- spin_unlock_bh(&sta->lock);
+ mutex_unlock(&sta->ampdu_mlme.mtx);
}
void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata,
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