Commit 6157ca0d authored by Ilan Peer's avatar Ilan Peer Committed by Johannes Berg

mac80211: Fix Tx aggregation session tear down with ITXQs

When mac80211 requests the low level driver to stop an ongoing
Tx aggregation, the low level driver is expected to call
ieee80211_stop_tx_ba_cb_irqsafe() to indicate that it is ready
to stop the session. The callback in turn schedules a worker
to complete the session tear down, which in turn also handles
the relevant state for the intermediate Tx queue.

However, as this flow in asynchronous, the intermediate queue
should be stopped and not continue servicing frames, as in
such a case frames that are dequeued would be marked as part
of an aggregation, although the aggregation is already been
stopped.

Fix this by stopping the intermediate Tx queue, before
calling the low level driver to stop the Tx aggregation.
Signed-off-by: default avatarIlan Peer <ilan.peer@intel.com>
Signed-off-by: default avatarLuca Coelho <luciano.coelho@intel.com>
Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
parent 1fc9b725
...@@ -8,7 +8,7 @@ ...@@ -8,7 +8,7 @@
* Copyright 2007, Michael Wu <flamingice@sourmilk.net> * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
* Copyright 2007-2010, Intel Corporation * Copyright 2007-2010, Intel Corporation
* Copyright(c) 2015-2017 Intel Deutschland GmbH * Copyright(c) 2015-2017 Intel Deutschland GmbH
* Copyright (C) 2018 Intel Corporation * Copyright (C) 2018 - 2019 Intel Corporation
* *
* This program is free software; you can redistribute it and/or modify * 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 * it under the terms of the GNU General Public License version 2 as
...@@ -366,6 +366,8 @@ int ___ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid, ...@@ -366,6 +366,8 @@ int ___ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
set_bit(HT_AGG_STATE_STOPPING, &tid_tx->state); set_bit(HT_AGG_STATE_STOPPING, &tid_tx->state);
ieee80211_agg_stop_txq(sta, tid);
spin_unlock_bh(&sta->lock); spin_unlock_bh(&sta->lock);
ht_dbg(sta->sdata, "Tx BA session stop requested for %pM tid %u\n", ht_dbg(sta->sdata, "Tx BA session stop requested for %pM tid %u\n",
......
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