package/mac80211/patches/530-ath9k_cleanup.patch

   1 --- a/drivers/net/wireless/ath/ath9k/common.h
   2 +++ b/drivers/net/wireless/ath/ath9k/common.h
   3 @@ -81,6 +81,7 @@ struct ath_buf {
   4         u16 bf_flags;
   5         struct ath_buf_state bf_state;
   6         dma_addr_t bf_dmacontext;
   7 +       struct ath_wiphy *aphy;
   8  };
   9
  10  struct ath_atx_tid {
  11 --- a/drivers/net/wireless/ath/ath9k/rc.h
  12 +++ b/drivers/net/wireless/ath/ath9k/rc.h
  13 @@ -167,24 +167,18 @@ struct ath_rate_priv {
  14         struct ath_rate_softc *asc;
  15  };
  16
  17 +#define ATH_TX_INFO_FRAME_TYPE_INTERNAL        (1 << 0)
  18 +#define ATH_TX_INFO_FRAME_TYPE_PAUSE   (1 << 1)
  19 +#define ATH_TX_INFO_UPDATE_RC          (1 << 2)
  20 +#define ATH_TX_INFO_XRETRY             (1 << 3)
  21 +#define ATH_TX_INFO_UNDERRUN           (1 << 4)
  22 +
  23  enum ath9k_internal_frame_type {
  24         ATH9K_NOT_INTERNAL,
  25         ATH9K_INT_PAUSE,
  26         ATH9K_INT_UNPAUSE
  27  };
  28
  29 -struct ath_tx_info_priv {
  30 -       struct ath_wiphy *aphy;
  31 -       struct ath_tx_status tx;
  32 -       int n_frames;
  33 -       int n_bad_frames;
  34 -       bool update_rc;
  35 -       enum ath9k_internal_frame_type frame_type;
  36 -};
  37 -
  38 -#define ATH_TX_INFO_PRIV(tx_info) \
  39 -       ((struct ath_tx_info_priv *)((tx_info)->rate_driver_data[0]))
  40 -
  41  void ath_rate_attach(struct ath_softc *sc);
  42  u8 ath_rate_findrateix(struct ath_softc *sc, u8 dot11_rate);
  43  int ath_rate_control_register(void);
  44 --- a/drivers/net/wireless/ath/ath9k/virtual.c
  45 +++ b/drivers/net/wireless/ath/ath9k/virtual.c
  46 @@ -338,13 +338,11 @@ void ath9k_wiphy_chan_work(struct work_s
  47  void ath9k_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb)
  48  {
  49         struct ath_wiphy *aphy = hw->priv;
  50 -       struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
  51         struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
  52 -       struct ath_tx_info_priv *tx_info_priv = ATH_TX_INFO_PRIV(tx_info);
  53
  54 -       if (tx_info_priv && tx_info_priv->frame_type == ATH9K_INT_PAUSE &&
  55 +       if ((tx_info->pad[0] & ATH_TX_INFO_FRAME_TYPE_PAUSE) &&
  56             aphy->state == ATH_WIPHY_PAUSING) {
  57 -               if (!(info->flags & IEEE80211_TX_STAT_ACK)) {
  58 +               if (!(tx_info->flags & IEEE80211_TX_STAT_ACK)) {
  59                         printk(KERN_DEBUG "ath9k: %s: no ACK for pause "
  60                                "frame\n", wiphy_name(hw->wiphy));
  61                         /*
  62 @@ -363,9 +361,6 @@ void ath9k_tx_status(struct ieee80211_hw
  63                 }
  64         }
  65
  66 -       kfree(tx_info_priv);
  67 -       tx_info->rate_driver_data[0] = NULL;
  68 -
  69         dev_kfree_skb(skb);
  70  }
  71
  72 --- a/drivers/net/wireless/ath/ath9k/xmit.c
  73 +++ b/drivers/net/wireless/ath/ath9k/xmit.c
  74 @@ -251,6 +251,7 @@ static struct ath_buf* ath_clone_txbuf(s
  75
  76         ATH_TXBUF_RESET(tbf);
  77
  78 +       tbf->aphy = bf->aphy;
  79         tbf->bf_mpdu = bf->bf_mpdu;
  80         tbf->bf_buf_addr = bf->bf_buf_addr;
  81         *(tbf->bf_desc) = *(bf->bf_desc);
  82 @@ -270,7 +271,6 @@ static void ath_tx_complete_aggr(struct
  83         struct ieee80211_hw *hw;
  84         struct ieee80211_hdr *hdr;
  85         struct ieee80211_tx_info *tx_info;
  86 -       struct ath_tx_info_priv *tx_info_priv;
  87         struct ath_atx_tid *tid = NULL;
  88         struct ath_buf *bf_next, *bf_last = bf->bf_lastbf;
  89         struct ath_desc *ds = bf_last->bf_desc;
  90 @@ -284,8 +284,7 @@ static void ath_tx_complete_aggr(struct
  91         hdr = (struct ieee80211_hdr *)skb->data;
  92
  93         tx_info = IEEE80211_SKB_CB(skb);
  94 -       tx_info_priv = (struct ath_tx_info_priv *) tx_info->rate_driver_data[0];
  95 -       hw = tx_info_priv->aphy->hw;
  96 +       hw = bf->aphy->hw;
  97
  98         rcu_read_lock();
  99
 100 @@ -464,7 +463,6 @@ static u32 ath_lookup_rate(struct ath_so
 101         struct sk_buff *skb;
 102         struct ieee80211_tx_info *tx_info;
 103         struct ieee80211_tx_rate *rates;
 104 -       struct ath_tx_info_priv *tx_info_priv;
 105         u32 max_4ms_framelen, frmlen;
 106         u16 aggr_limit, legacy = 0;
 107         int i;
 108 @@ -472,7 +470,6 @@ static u32 ath_lookup_rate(struct ath_so
 109         skb = bf->bf_mpdu;
 110         tx_info = IEEE80211_SKB_CB(skb);
 111         rates = tx_info->control.rates;
 112 -       tx_info_priv = (struct ath_tx_info_priv *)tx_info->rate_driver_data[0];
 113
 114         /*
 115          * Find the lowest frame length among the rate series that will have a
 116 @@ -1560,21 +1557,26 @@ static int ath_tx_setup_buffer(struct ie
 117         struct ath_softc *sc = aphy->sc;
 118         struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
 119         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 120 -       struct ath_tx_info_priv *tx_info_priv;
 121         int hdrlen;
 122         __le16 fc;
 123
 124 -       tx_info_priv = kzalloc(sizeof(*tx_info_priv), GFP_ATOMIC);
 125 -       if (unlikely(!tx_info_priv))
 126 -               return -ENOMEM;
 127 -       tx_info->rate_driver_data[0] = tx_info_priv;
 128 -       tx_info_priv->aphy = aphy;
 129 -       tx_info_priv->frame_type = txctl->frame_type;
 130 +       tx_info->pad[0] = 0;
 131 +       switch (txctl->frame_type) {
 132 +       case ATH9K_NOT_INTERNAL:
 133 +               break;
 134 +       case ATH9K_INT_PAUSE:
 135 +               tx_info->pad[0] |= ATH_TX_INFO_FRAME_TYPE_PAUSE;
 136 +               /* fall through */
 137 +       case ATH9K_INT_UNPAUSE:
 138 +               tx_info->pad[0] |= ATH_TX_INFO_FRAME_TYPE_INTERNAL;
 139 +               break;
 140 +       }
 141         hdrlen = ieee80211_get_hdrlen_from_skb(skb);
 142         fc = hdr->frame_control;
 143
 144         ATH_TXBUF_RESET(bf);
 145
 146 +       bf->aphy = aphy;
 147         bf->bf_frmlen = skb->len + FCS_LEN - (hdrlen & 3);
 148
 149         if (conf_is_ht(&hw->conf) && !is_pae(skb))
 150 @@ -1599,8 +1601,6 @@ static int ath_tx_setup_buffer(struct ie
 151                                            skb->len, DMA_TO_DEVICE);
 152         if (unlikely(dma_mapping_error(sc->dev, bf->bf_dmacontext))) {
 153                 bf->bf_mpdu = NULL;
 154 -               kfree(tx_info_priv);
 155 -               tx_info->rate_driver_data[0] = NULL;
 156                 ath_print(ath9k_hw_common(sc->sc_ah), ATH_DBG_FATAL,
 157                           "dma_mapping_error() on TX\n");
 158                 return -ENOMEM;
 159 @@ -1781,27 +1781,17 @@ exit:
 160  /*****************/
 161
 162  static void ath_tx_complete(struct ath_softc *sc, struct sk_buff *skb,
 163 -                           int tx_flags)
 164 +                           struct ath_wiphy *aphy, int tx_flags)
 165  {
 166         struct ieee80211_hw *hw = sc->hw;
 167         struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
 168 -       struct ath_tx_info_priv *tx_info_priv = ATH_TX_INFO_PRIV(tx_info);
 169         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
 170         int hdrlen, padsize;
 171 -       int frame_type = ATH9K_NOT_INTERNAL;
 172
 173         ath_print(common, ATH_DBG_XMIT, "TX complete: skb: %p\n", skb);
 174
 175 -       if (tx_info_priv) {
 176 -               hw = tx_info_priv->aphy->hw;
 177 -               frame_type = tx_info_priv->frame_type;
 178 -       }
 179 -
 180 -       if (tx_info->flags & IEEE80211_TX_CTL_NO_ACK ||
 181 -           tx_info->flags & IEEE80211_TX_STAT_TX_FILTERED) {
 182 -               kfree(tx_info_priv);
 183 -               tx_info->rate_driver_data[0] = NULL;
 184 -       }
 185 +       if (aphy)
 186 +               hw = aphy->hw;
 187
 188         if (tx_flags & ATH_TX_BAR)
 189                 tx_info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
 190 @@ -1833,10 +1823,10 @@ static void ath_tx_complete(struct ath_s
 191                                         SC_OP_WAIT_FOR_TX_ACK));
 192         }
 193
 194 -       if (frame_type == ATH9K_NOT_INTERNAL)
 195 -               ieee80211_tx_status(hw, skb);
 196 -       else
 197 +       if (unlikely(tx_info->pad[0] & ATH_TX_INFO_FRAME_TYPE_INTERNAL))
 198                 ath9k_tx_status(hw, skb);
 199 +       else
 200 +               ieee80211_tx_status(hw, skb);
 201  }
 202
 203  static void ath_tx_complete_buf(struct ath_softc *sc, struct ath_buf *bf,
 204 @@ -1859,7 +1849,7 @@ static void ath_tx_complete_buf(struct a
 205         }
 206
 207         dma_unmap_single(sc->dev, bf->bf_dmacontext, skb->len, DMA_TO_DEVICE);
 208 -       ath_tx_complete(sc, skb, tx_flags);
 209 +       ath_tx_complete(sc, skb, bf->aphy, tx_flags);
 210         ath_debug_stat_tx(sc, txq, bf);
 211
 212         /*
 213 @@ -1907,8 +1897,7 @@ static void ath_tx_rc_status(struct ath_
 214         struct sk_buff *skb = bf->bf_mpdu;
 215         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 216         struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
 217 -       struct ath_tx_info_priv *tx_info_priv = ATH_TX_INFO_PRIV(tx_info);
 218 -       struct ieee80211_hw *hw = tx_info_priv->aphy->hw;
 219 +       struct ieee80211_hw *hw = bf->aphy->hw;
 220         u8 i, tx_rateindex;
 221
 222         if (txok)
 223 @@ -1917,17 +1906,22 @@ static void ath_tx_rc_status(struct ath_
 224         tx_rateindex = ds->ds_txstat.ts_rateindex;
 225         WARN_ON(tx_rateindex >= hw->max_rates);
 226
 227 -       tx_info_priv->update_rc = update_rc;
 228 +       if (update_rc)
 229 +               tx_info->pad[0] |= ATH_TX_INFO_UPDATE_RC;
 230         if (ds->ds_txstat.ts_status & ATH9K_TXERR_FILT)
 231                 tx_info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
 232
 233         if ((ds->ds_txstat.ts_status & ATH9K_TXERR_FILT) == 0 &&
 234             (bf->bf_flags & ATH9K_TXDESC_NOACK) == 0 && update_rc) {
 235                 if (ieee80211_is_data(hdr->frame_control)) {
 236 -                       memcpy(&tx_info_priv->tx, &ds->ds_txstat,
 237 -                              sizeof(tx_info_priv->tx));
 238 -                       tx_info_priv->n_frames = bf->bf_nframes;
 239 -                       tx_info_priv->n_bad_frames = nbad;
 240 +                       if (ds->ds_txstat.ts_flags &
 241 +                           (ATH9K_TX_DATA_UNDERRUN | ATH9K_TX_DELIM_UNDERRUN))
 242 +                               tx_info->pad[0] |= ATH_TX_INFO_UNDERRUN;
 243 +                       if ((ds->ds_txstat.ts_status & ATH9K_TXERR_XRETRY) ||
 244 +                           (ds->ds_txstat.ts_status & ATH9K_TXERR_FIFO))
 245 +                               tx_info->pad[0] |= ATH_TX_INFO_XRETRY;
 246 +                       tx_info->status.ampdu_len = bf->bf_nframes;
 247 +                       tx_info->status.ampdu_ack_len = bf->bf_nframes - nbad;
 248                 }
 249         }
 250
 251 --- a/drivers/net/wireless/ath/ath9k/debug.c
 252 +++ b/drivers/net/wireless/ath/ath9k/debug.c
 253 @@ -257,14 +257,17 @@ static const struct file_operations fops
 254
 255  void ath_debug_stat_rc(struct ath_softc *sc, struct sk_buff *skb)
 256  {
 257 -       struct ath_tx_info_priv *tx_info_priv = NULL;
 258         struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
 259         struct ieee80211_tx_rate *rates = tx_info->status.rates;
 260 -       int final_ts_idx, idx;
 261 +       int final_ts_idx = 0, idx, i;
 262         struct ath_rc_stats *stats;
 263
 264 -       tx_info_priv = ATH_TX_INFO_PRIV(tx_info);
 265 -       final_ts_idx = tx_info_priv->tx.ts_rateindex;
 266 +       for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
 267 +               if (!rates[i].count)
 268 +                       break;
 269 +
 270 +               final_ts_idx = i;
 271 +       }
 272         idx = rates[final_ts_idx].idx;
 273         stats = &sc->debug.stats.rcstats[idx];
 274         stats->success++;
 275 --- a/drivers/net/wireless/ath/ath9k/rc.c
 276 +++ b/drivers/net/wireless/ath/ath9k/rc.c
 277 @@ -859,12 +859,12 @@ static void ath_get_rate(void *priv, str
 278  static bool ath_rc_update_per(struct ath_softc *sc,
 279                               const struct ath_rate_table *rate_table,
 280                               struct ath_rate_priv *ath_rc_priv,
 281 -                             struct ath_tx_info_priv *tx_info_priv,
 282 +                                 struct ieee80211_tx_info *tx_info,
 283                               int tx_rate, int xretries, int retries,
 284                               u32 now_msec)
 285  {
 286         bool state_change = false;
 287 -       int count;
 288 +       int count, n_bad_frames;
 289         u8 last_per;
 290         static u32 nretry_to_per_lookup[10] = {
 291                 100 * 0 / 1,
 292 @@ -880,6 +880,7 @@ static bool ath_rc_update_per(struct ath
 293         };
 294
 295         last_per = ath_rc_priv->per[tx_rate];
 296 +       n_bad_frames = tx_info->status.ampdu_len - tx_info->status.ampdu_ack_len;
 297
 298         if (xretries) {
 299                 if (xretries == 1) {
 300 @@ -907,7 +908,7 @@ static bool ath_rc_update_per(struct ath
 301                 if (retries >= count)
 302                         retries = count - 1;
 303
 304 -               if (tx_info_priv->n_bad_frames) {
 305 +               if (n_bad_frames) {
 306                         /* new_PER = 7/8*old_PER + 1/8*(currentPER)
 307                          * Assuming that n_frames is not 0.  The current PER
 308                          * from the retries is 100 * retries / (retries+1),
 309 @@ -920,14 +921,14 @@ static bool ath_rc_update_per(struct ath
 310                          * the above PER.  The expression below is a
 311                          * simplified version of the sum of these two terms.
 312                          */
 313 -                       if (tx_info_priv->n_frames > 0) {
 314 -                               int n_frames, n_bad_frames;
 315 +                       if (tx_info->status.ampdu_len > 0) {
 316 +                               int n_frames, n_bad_tries;
 317                                 u8 cur_per, new_per;
 318
 319 -                               n_bad_frames = retries * tx_info_priv->n_frames +
 320 -                                       tx_info_priv->n_bad_frames;
 321 -                               n_frames = tx_info_priv->n_frames * (retries + 1);
 322 -                               cur_per = (100 * n_bad_frames / n_frames) >> 3;
 323 +                               n_bad_tries = retries * tx_info->status.ampdu_len +
 324 +                                       n_bad_frames;
 325 +                               n_frames = tx_info->status.ampdu_len * (retries + 1);
 326 +                               cur_per = (100 * n_bad_tries / n_frames) >> 3;
 327                                 new_per = (u8)(last_per - (last_per >> 3) + cur_per);
 328                                 ath_rc_priv->per[tx_rate] = new_per;
 329                         }
 330 @@ -943,8 +944,7 @@ static bool ath_rc_update_per(struct ath
 331                  * this was a probe.  Otherwise, ignore the probe.
 332                  */
 333                 if (ath_rc_priv->probe_rate && ath_rc_priv->probe_rate == tx_rate) {
 334 -                       if (retries > 0 || 2 * tx_info_priv->n_bad_frames >
 335 -                               tx_info_priv->n_frames) {
 336 +                       if (retries > 0 || 2 * n_bad_frames > tx_info->status.ampdu_len) {
 337                                 /*
 338                                  * Since we probed with just a single attempt,
 339                                  * any retries means the probe failed.  Also,
 340 @@ -1003,7 +1003,7 @@ static bool ath_rc_update_per(struct ath
 341
 342  static void ath_rc_update_ht(struct ath_softc *sc,
 343                              struct ath_rate_priv *ath_rc_priv,
 344 -                            struct ath_tx_info_priv *tx_info_priv,
 345 +                            struct ieee80211_tx_info *tx_info,
 346                              int tx_rate, int xretries, int retries)
 347  {
 348         u32 now_msec = jiffies_to_msecs(jiffies);
 349 @@ -1020,7 +1020,7 @@ static void ath_rc_update_ht(struct ath_
 350
 351         /* Update PER first */
 352         state_change = ath_rc_update_per(sc, rate_table, ath_rc_priv,
 353 -                                        tx_info_priv, tx_rate, xretries,
 354 +                                        tx_info, tx_rate, xretries,
 355                                          retries, now_msec);
 356
 357         /*
 358 @@ -1098,7 +1098,6 @@ static void ath_rc_tx_status(struct ath_
 359                              struct ieee80211_tx_info *tx_info,
 360                              int final_ts_idx, int xretries, int long_retry)
 361  {
 362 -       struct ath_tx_info_priv *tx_info_priv = ATH_TX_INFO_PRIV(tx_info);
 363         const struct ath_rate_table *rate_table;
 364         struct ieee80211_tx_rate *rates = tx_info->status.rates;
 365         u8 flags;
 366 @@ -1124,9 +1123,8 @@ static void ath_rc_tx_status(struct ath_
 367                                         return;
 368
 369                                 rix = ath_rc_get_rateindex(rate_table, &rates[i]);
 370 -                               ath_rc_update_ht(sc, ath_rc_priv,
 371 -                                               tx_info_priv, rix,
 372 -                                               xretries ? 1 : 2,
 373 +                               ath_rc_update_ht(sc, ath_rc_priv, tx_info,
 374 +                                               rix, xretries ? 1 : 2,
 375                                                 rates[i].count);
 376                         }
 377                 }
 378 @@ -1149,8 +1147,7 @@ static void ath_rc_tx_status(struct ath_
 379                 return;
 380
 381         rix = ath_rc_get_rateindex(rate_table, &rates[i]);
 382 -       ath_rc_update_ht(sc, ath_rc_priv, tx_info_priv, rix,
 383 -                        xretries, long_retry);
 384 +       ath_rc_update_ht(sc, ath_rc_priv, tx_info, rix, xretries, long_retry);
 385  }
 386
 387  static const
 388 @@ -1301,23 +1298,30 @@ static void ath_tx_status(void *priv, st
 389  {
 390         struct ath_softc *sc = priv;
 391         struct ath_rate_priv *ath_rc_priv = priv_sta;
 392 -       struct ath_tx_info_priv *tx_info_priv = NULL;
 393         struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
 394         struct ieee80211_hdr *hdr;
 395 -       int final_ts_idx, tx_status = 0, is_underrun = 0;
 396 +       int final_ts_idx = 0, tx_status = 0, is_underrun = 0;
 397 +       int long_retry = 0;
 398         __le16 fc;
 399 +       int i;
 400
 401         hdr = (struct ieee80211_hdr *)skb->data;
 402         fc = hdr->frame_control;
 403 -       tx_info_priv = ATH_TX_INFO_PRIV(tx_info);
 404 -       final_ts_idx = tx_info_priv->tx.ts_rateindex;
 405 +       for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
 406 +               struct ieee80211_tx_rate *rate = &tx_info->status.rates[i];
 407 +               if (!rate->count)
 408 +                       break;
 409 +
 410 +               final_ts_idx = i;
 411 +               long_retry = rate->count - 1;
 412 +       }
 413
 414         if (!priv_sta || !ieee80211_is_data(fc) ||
 415 -           !tx_info_priv->update_rc)
 416 -               goto exit;
 417 +           !(tx_info->pad[0] & ATH_TX_INFO_UPDATE_RC))
 418 +               return;
 419
 420 -       if (tx_info_priv->tx.ts_status & ATH9K_TXERR_FILT)
 421 -               goto exit;
 422 +       if (tx_info->flags & IEEE80211_TX_STAT_TX_FILTERED)
 423 +               return;
 424
 425         /*
 426          * If underrun error is seen assume it as an excessive retry only
 427 @@ -1325,20 +1329,17 @@ static void ath_tx_status(void *priv, st
 428          * Adjust the long retry as if the frame was tried hw->max_rate_tries
 429          * times. This affects how ratectrl updates PER for the failed rate.
 430          */
 431 -       if (tx_info_priv->tx.ts_flags &
 432 -           (ATH9K_TX_DATA_UNDERRUN | ATH9K_TX_DELIM_UNDERRUN) &&
 433 -           ((sc->sc_ah->tx_trig_level) >= ath_rc_priv->tx_triglevel_max)) {
 434 +       if ((tx_info->pad[0] & ATH_TX_INFO_UNDERRUN) &&
 435 +           (sc->sc_ah->tx_trig_level >= ath_rc_priv->tx_triglevel_max)) {
 436                 tx_status = 1;
 437                 is_underrun = 1;
 438         }
 439
 440 -       if ((tx_info_priv->tx.ts_status & ATH9K_TXERR_XRETRY) ||
 441 -           (tx_info_priv->tx.ts_status & ATH9K_TXERR_FIFO))
 442 +       if (tx_info->pad[0] & ATH_TX_INFO_XRETRY)
 443                 tx_status = 1;
 444
 445         ath_rc_tx_status(sc, ath_rc_priv, tx_info, final_ts_idx, tx_status,
 446 -                        (is_underrun) ? sc->hw->max_rate_tries :
 447 -                        tx_info_priv->tx.ts_longretry);
 448 +                        (is_underrun) ? sc->hw->max_rate_tries : long_retry);
 449
 450         /* Check if aggregation has to be enabled for this tid */
 451         if (conf_is_ht(&sc->hw->conf) &&
 452 @@ -1357,8 +1358,6 @@ static void ath_tx_status(void *priv, st
 453         }
 454
 455         ath_debug_stat_rc(sc, skb);
 456 -exit:
 457 -       kfree(tx_info_priv);
 458  }
 459
 460  static void ath_rate_init(void *priv, struct ieee80211_supported_band *sband,