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 <[email protected]> Signed-off-by: Emmanuel Grumbach <[email protected]> --- net/mac80211/tx.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c index 114509a..5473281 100644 --- a/net/mac80211/tx.c +++ b/net/mac80211/tx.c @@ -1116,6 +1116,13 @@ static bool ieee80211_tx_prep_agg(struct ieee80211_tx_data *tx, reset_agg_timer = true; } else { queued = true; + /* XXX: should I test IEEE80211_TX_STATUS_EOSP here? */ + 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; -- 2.5.0 -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
