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mac80211: close the SP when we enqueue frames during the SP

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Since we enqueued the frame that was supposed to be sent
during the SP, and that frame may very well cary the
IEEE80211_TX_STATUS_EOSP bit, we may never close the SP
(WLAN_STA_SP will never be cleared). If that happens, we
will not open any new SP and will never respond to any poll
frame from the client.
Clear WLAN_STA_SP manually if a frame that was polled during
the SP is queued because of a starting A-MPDU session. The
client may not see the EOSP bit, but it will at least be
able to poll new frames in another SP.

Reported-by: Alesya Shapira <alesya.shapira@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
[remove erroneous comment]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Emmanuel Grumbach 2016-03-17 16:51:42 +02:00 committed by Johannes Berg
parent 4b559ec0bf
commit f6d4671a08
1 changed files with 6 additions and 0 deletions
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6
net/mac80211/tx.c
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@ -1116,6 +1116,12 @@ static bool ieee80211_tx_prep_agg(struct ieee80211_tx_data *tx,
reset_agg_timer = true;
} else {
queued = true;
if (info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER) {
clear_sta_flag(tx->sta, WLAN_STA_SP);
ps_dbg(tx->sta->sdata,
"STA %pM aid %d: SP frame queued, close the SP w/o telling the peer\n",
tx->sta->sta.addr, tx->sta->sta.aid);
}
info->control.vif = &tx->sdata->vif;
info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING;
info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS;