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iwlwifi: mvm: send delba upon rx ba session timeout

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When an RX block-ack session times out, the firmware, which offloads
RX reordering but not the BA session negotiation, stops the session
but doesn't send a DELBA.  This causes the the session to remain
active in the remote device, so no more BA sessions will be
established, causing a severe throughput degradation due to the lack
of aggregation.

Use the new ieee80211_rx_ba_timer_expired API when the ba session timer
expires, since this will tear down the ba session and also send a delba.

The previous API used is intended for drivers that offload the
addba/delba negotiation, but not the rx reordering, while our driver
does the opposite.

This patch depends on "mac80211: add api to start ba session timer
expired flow".

Signed-off-by: Naftali Goldstein <naftali.goldstein@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
This commit is contained in:
Naftali Goldstein 2017-07-11 10:07:32 +03:00 committed by Luca Coelho
parent 04c2cf3436
commit 20fc690f38
1 changed files with 2 additions and 2 deletions
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4
drivers/net/wireless/intel/iwlwifi/mvm/sta.c
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@ -291,8 +291,8 @@ static void iwl_mvm_rx_agg_session_expired(unsigned long data)
goto unlock;
mvm_sta = iwl_mvm_sta_from_mac80211(sta);
ieee80211_stop_rx_ba_session_offl(mvm_sta->vif,
sta->addr, ba_data->tid);
ieee80211_rx_ba_timer_expired(mvm_sta->vif,
sta->addr, ba_data->tid);
unlock:
rcu_read_unlock();
}