1 files changed, 13 insertions, 3 deletions

diff --git a/drivers/net/wireless/ath/ath9k/xmit.c b/drivers/net/wireless/ath/ath9k/xmit.c
index e1d1e903229b..feef0135515c 100644
--- a/drivers/net/wireless/ath/ath9k/xmit.c
+++ b/drivers/net/wireless/ath/ath9k/xmit.c
@@ -644,8 +644,10 @@ static u32 ath_lookup_rate(struct ath_softc *sc, struct ath_buf *bf,
  * meet the minimum required mpdudensity.
  */
 static int ath_compute_num_delims(struct ath_softc *sc, struct ath_atx_tid *tid,
-                                  struct ath_buf *bf, u16 frmlen)
+                                  struct ath_buf *bf, u16 frmlen,
+                                  bool first_subfrm)
 {
+#define FIRST_DESC_NDELIMS 60
         struct sk_buff *skb = bf->bf_mpdu;
         struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
         u32 nsymbits, nsymbols;
@@ -668,6 +670,13 @@ static int ath_compute_num_delims(struct ath_softc *sc, struct ath_atx_tid *tid,
                 ndelim += ATH_AGGR_ENCRYPTDELIM;
 
         /*
+         * Add delimiter when using RTS/CTS with aggregation
+         * and non enterprise AR9003 card
+         */
+        if (first_subfrm)
+                ndelim = max(ndelim, FIRST_DESC_NDELIMS);
+
+        /*
          * Convert desired mpdu density from microeconds to bytes based
          * on highest rate in rate series (i.e. first rate) to determine
          * required minimum length for subframe. Take into account
@@ -756,7 +765,6 @@ static enum ATH_AGGR_STATUS ath_tx_form_aggr(struct ath_softc *sc,
                         status = ATH_AGGR_LIMITED;
                         break;
                 }
-                nframes++;
 
                 /* add padding for previous frame to aggregation length */
                 al += bpad + al_delta;
@@ -765,9 +773,11 @@ static enum ATH_AGGR_STATUS ath_tx_form_aggr(struct ath_softc *sc,
                  * Get the delimiters needed to meet the MPDU
                  * density for this node.
                  */
-                ndelim = ath_compute_num_delims(sc, tid, bf_first, fi->framelen);
+                ndelim = ath_compute_num_delims(sc, tid, bf_first, fi->framelen,
+                                                !nframes);
                 bpad = PADBYTES(al_delta) + (ndelim << 2);
 
+                nframes++;
                 bf->bf_next = NULL;
                 ath9k_hw_set_desc_link(sc->sc_ah, bf->bf_desc, 0);