package/kernel/mac80211/patches/336-ath9k-improve-powersave-filter-handling.patch

   1 From: Felix Fietkau <nbd@nbd.name>
   2 Date: Tue, 2 Aug 2016 12:13:35 +0200
   3 Subject: [PATCH] ath9k: improve powersave filter handling
   4
   5 For non-aggregated frames, ath9k was leaving handling of powersave
   6 filtered packets to mac80211. This can be too slow if the intermediate
   7 queue is already filled with packets and mac80211 does not immediately
   8 send a new packet via drv_tx().
   9
  10 Improve response time with filtered frames by triggering clearing the
  11 powersave filter internally.
  12
  13 Signed-off-by: Felix Fietkau <nbd@nbd.name>
  14 ---
  15
  16 --- a/drivers/net/wireless/ath/ath9k/xmit.c
  17 +++ b/drivers/net/wireless/ath/ath9k/xmit.c
  18 @@ -461,13 +461,13 @@ static void ath_tx_count_frames(struct a
  19  static void ath_tx_complete_aggr(struct ath_softc *sc, struct ath_txq *txq,
  20                                  struct ath_buf *bf, struct list_head *bf_q,
  21                                  struct ieee80211_sta *sta,
  22 +                                struct ath_atx_tid *tid,
  23                                  struct ath_tx_status *ts, int txok)
  24  {
  25         struct ath_node *an = NULL;
  26         struct sk_buff *skb;
  27         struct ieee80211_hdr *hdr;
  28         struct ieee80211_tx_info *tx_info;
  29 -       struct ath_atx_tid *tid = NULL;
  30         struct ath_buf *bf_next, *bf_last = bf->bf_lastbf;
  31         struct list_head bf_head;
  32         struct sk_buff_head bf_pending;
  33 @@ -509,7 +509,6 @@ static void ath_tx_complete_aggr(struct
  34         }
  35
  36         an = (struct ath_node *)sta->drv_priv;
  37 -       tid = ath_get_skb_tid(sc, an, skb);
  38         seq_first = tid->seq_start;
  39         isba = ts->ts_flags & ATH9K_TX_BA;
  40
  41 @@ -695,6 +694,7 @@ static void ath_tx_process_buffer(struct
  42         struct ieee80211_tx_info *info;
  43         struct ieee80211_sta *sta;
  44         struct ieee80211_hdr *hdr;
  45 +       struct ath_atx_tid *tid = NULL;
  46         bool txok, flush;
  47
  48         txok = !(ts->ts_status & ATH9K_TXERR_MASK);
  49 @@ -710,6 +710,12 @@ static void ath_tx_process_buffer(struct
  50
  51         hdr = (struct ieee80211_hdr *) bf->bf_mpdu->data;
  52         sta = ieee80211_find_sta_by_ifaddr(hw, hdr->addr1, hdr->addr2);
  53 +       if (sta) {
  54 +               struct ath_node *an = (struct ath_node *)sta->drv_priv;
  55 +               tid = ath_get_skb_tid(sc, an, bf->bf_mpdu);
  56 +               if (ts->ts_status & (ATH9K_TXERR_FILT | ATH9K_TXERR_XRETRY))
  57 +                       tid->clear_ps_filter = true;
  58 +       }
  59
  60         if (!bf_isampdu(bf)) {
  61                 if (!flush) {
  62 @@ -721,7 +727,7 @@ static void ath_tx_process_buffer(struct
  63                 }
  64                 ath_tx_complete_buf(sc, bf, txq, bf_head, sta, ts, txok);
  65         } else
  66 -               ath_tx_complete_aggr(sc, txq, bf, bf_head, sta, ts, txok);
  67 +               ath_tx_complete_aggr(sc, txq, bf, bf_head, sta, tid, ts, txok);
  68
  69         if (!flush)
  70                 ath_txq_schedule(sc, txq);