1 files changed, 12 insertions, 0 deletions

diff --git a/drivers/net/wireless/ath/ath9k/xmit.c b/drivers/net/wireless/ath/ath9k/xmit.c
index 8d8306039edb..cafb4a09729a 100644
--- a/drivers/net/wireless/ath/ath9k/xmit.c
+++ b/drivers/net/wireless/ath/ath9k/xmit.c
@@ -1165,6 +1165,7 @@ int ath_tx_aggr_start(struct ath_softc *sc, struct ieee80211_sta *sta,
 {
         struct ath_atx_tid *txtid;
         struct ath_node *an;
+        u8 density;
 
         an = (struct ath_node *)sta->drv_priv;
         txtid = ATH_AN_2_TID(an, tid);
@@ -1172,6 +1173,17 @@ int ath_tx_aggr_start(struct ath_softc *sc, struct ieee80211_sta *sta,
         if (txtid->state & (AGGR_CLEANUP | AGGR_ADDBA_COMPLETE))
                 return -EAGAIN;
 
+        /* update ampdu factor/density, they may have changed. This may happen
+         * in HT IBSS when a beacon with HT-info is received after the station
+         * has already been added.
+         */
+        if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_HT) {
+                an->maxampdu = 1 << (IEEE80211_HT_MAX_AMPDU_FACTOR +
+                                     sta->ht_cap.ampdu_factor);
+                density = ath9k_parse_mpdudensity(sta->ht_cap.ampdu_density);
+                an->mpdudensity = density;
+        }
+
         txtid->state |= AGGR_ADDBA_PROGRESS;
         txtid->paused = true;
         *ssn = txtid->seq_start = txtid->seq_next;