ath9k: Fix bug in reporting status of tx rate

This patch updates count of every hw tried rate with
appropriate tries before reporting tx status of a frame.

Signed-off-by: Vasanthakumar Thiagarajan <vasanth@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/drivers/net/wireless/ath9k/xmit.c b/drivers/net/wireless/ath9k/xmit.c
index f287719..21e90bc 100644 (file)
--- a/drivers/net/wireless/ath9k/xmit.c
+++ b/drivers/net/wireless/ath9k/xmit.c
@@ -67,7 +67,7 @@ static void ath_buf_set_rate(struct ath_softc *sc, struct ath_buf *bf);
 static int ath_tx_num_badfrms(struct ath_softc *sc, struct ath_buf *bf,
                              int txok);
 static void ath_tx_rc_status(struct ath_buf *bf, struct ath_desc *ds,
-                            int nbad, int txok);
+                            int nbad, int txok, bool update_rc);
 
 /*********************/
 /* Aggregation logic */
@@ -370,11 +370,13 @@ static void ath_tx_complete_aggr(struct ath_softc *sc, struct ath_txq *txq,
                        ath_tx_update_baw(sc, tid, bf->bf_seqno);
                        spin_unlock_bh(&txq->axq_lock);
 
-                       if (rc_update)
-                               if (acked_cnt == 1 || txfail_cnt == 1) {
-                                       ath_tx_rc_status(bf, ds, nbad, txok);
-                                       rc_update = false;
-                               }
+                       if (rc_update && (acked_cnt == 1 || txfail_cnt == 1)) {
+                               ath_tx_rc_status(bf, ds, nbad, txok, true);
+                               rc_update = false;
+                       } else {
+                               ath_tx_rc_status(bf, ds, nbad, txok, false);
+                       }
+
                        ath_tx_complete_buf(sc, bf, &bf_head, !txfail, sendbar);
                } else {
                        /* retry the un-acked ones */
@@ -1779,8 +1781,6 @@ static void ath_tx_complete(struct ath_softc *sc, struct sk_buff *skb,
                tx_info->flags |= IEEE80211_TX_STAT_ACK;
        }
 
-       tx_info->status.rates[0].count = tx_status->retries + 1;
-
        hdrlen = ieee80211_get_hdrlen_from_skb(skb);
        padsize = hdrlen & 3;
        if (padsize && hdrlen >= 24) {
@@ -1867,30 +1867,39 @@ static int ath_tx_num_badfrms(struct ath_softc *sc, struct ath_buf *bf,
 }
 
 static void ath_tx_rc_status(struct ath_buf *bf, struct ath_desc *ds,
-                            int nbad, int txok)
+                            int nbad, int txok, bool update_rc)
 {
        struct sk_buff *skb = (struct sk_buff *)bf->bf_mpdu;
        struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
        struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
        struct ath_tx_info_priv *tx_info_priv = ATH_TX_INFO_PRIV(tx_info);
+       struct ieee80211_hw *hw = tx_info_priv->aphy->hw;
+       u8 i, tx_rateindex;
 
        if (txok)
                tx_info->status.ack_signal = ds->ds_txstat.ts_rssi;
 
-       tx_info_priv->update_rc = false;
+       tx_rateindex = ds->ds_txstat.ts_rateindex;
+       WARN_ON(tx_rateindex >= hw->max_rates);
+
+       tx_info_priv->update_rc = update_rc;
        if (ds->ds_txstat.ts_status & ATH9K_TXERR_FILT)
                tx_info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
 
        if ((ds->ds_txstat.ts_status & ATH9K_TXERR_FILT) == 0 &&
-           (bf->bf_flags & ATH9K_TXDESC_NOACK) == 0) {
+           (bf->bf_flags & ATH9K_TXDESC_NOACK) == 0 && update_rc) {
                if (ieee80211_is_data(hdr->frame_control)) {
                        memcpy(&tx_info_priv->tx, &ds->ds_txstat,
                               sizeof(tx_info_priv->tx));
                        tx_info_priv->n_frames = bf->bf_nframes;
                        tx_info_priv->n_bad_frames = nbad;
-                       tx_info_priv->update_rc = true;
                }
        }
+
+       for (i = tx_rateindex + 1; i < hw->max_rates; i++)
+               tx_info->status.rates[i].count = 0;
+
+       tx_info->status.rates[tx_rateindex].count = bf->bf_retries + 1;
 }
 
 static void ath_wake_mac80211_queue(struct ath_softc *sc, struct ath_txq *txq)
@@ -2009,7 +2018,7 @@ static void ath_tx_processq(struct ath_softc *sc, struct ath_txq *txq)
                        bf->bf_retries = ds->ds_txstat.ts_longretry;
                        if (ds->ds_txstat.ts_status & ATH9K_TXERR_XRETRY)
                                bf->bf_state.bf_type |= BUF_XRETRY;
-                       ath_tx_rc_status(bf, ds, 0, txok);
+                       ath_tx_rc_status(bf, ds, 0, txok, true);
                }
 
                if (bf_isampdu(bf))