ath9k: improve powersave filter handling

Signed-off-by: Felix Fietkau <nbd@nbd.name>

diff --git a/package/kernel/mac80211/patches/336-ath9k-improve-powersave-filter-handling.patch b/package/kernel/mac80211/patches/336-ath9k-improve-powersave-filter-handling.patch
new file mode 100644 (file)
index 0000000..67a6c63
--- /dev/null
+++ b/package/kernel/mac80211/patches/336-ath9k-improve-powersave-filter-handling.patch
@@ -0,0 +1,70 @@
+From: Felix Fietkau <nbd@nbd.name>
+Date: Tue, 2 Aug 2016 12:13:35 +0200
+Subject: [PATCH] ath9k: improve powersave filter handling
+
+For non-aggregated frames, ath9k was leaving handling of powersave
+filtered packets to mac80211. This can be too slow if the intermediate
+queue is already filled with packets and mac80211 does not immediately
+send a new packet via drv_tx().
+
+Improve response time with filtered frames by triggering clearing the
+powersave filter internally.
+
+Signed-off-by: Felix Fietkau <nbd@nbd.name>
+---
+
+--- a/drivers/net/wireless/ath/ath9k/xmit.c
++++ b/drivers/net/wireless/ath/ath9k/xmit.c
+@@ -461,13 +461,13 @@ static void ath_tx_count_frames(struct a
+ static void ath_tx_complete_aggr(struct ath_softc *sc, struct ath_txq *txq,
+                                struct ath_buf *bf, struct list_head *bf_q,
+                                struct ieee80211_sta *sta,
++                               struct ath_atx_tid *tid,
+                                struct ath_tx_status *ts, int txok)
+ {
+       struct ath_node *an = NULL;
+       struct sk_buff *skb;
+       struct ieee80211_hdr *hdr;
+       struct ieee80211_tx_info *tx_info;
+-      struct ath_atx_tid *tid = NULL;
+       struct ath_buf *bf_next, *bf_last = bf->bf_lastbf;
+       struct list_head bf_head;
+       struct sk_buff_head bf_pending;
+@@ -509,7 +509,6 @@ static void ath_tx_complete_aggr(struct
+       }
+ 
+       an = (struct ath_node *)sta->drv_priv;
+-      tid = ath_get_skb_tid(sc, an, skb);
+       seq_first = tid->seq_start;
+       isba = ts->ts_flags & ATH9K_TX_BA;
+ 
+@@ -695,6 +694,7 @@ static void ath_tx_process_buffer(struct
+       struct ieee80211_tx_info *info;
+       struct ieee80211_sta *sta;
+       struct ieee80211_hdr *hdr;
++      struct ath_atx_tid *tid = NULL;
+       bool txok, flush;
+ 
+       txok = !(ts->ts_status & ATH9K_TXERR_MASK);
+@@ -710,6 +710,12 @@ static void ath_tx_process_buffer(struct
+ 
+       hdr = (struct ieee80211_hdr *) bf->bf_mpdu->data;
+       sta = ieee80211_find_sta_by_ifaddr(hw, hdr->addr1, hdr->addr2);
++      if (sta) {
++              struct ath_node *an = (struct ath_node *)sta->drv_priv;
++              tid = ath_get_skb_tid(sc, an, bf->bf_mpdu);
++              if (ts->ts_status & (ATH9K_TXERR_FILT | ATH9K_TXERR_XRETRY))
++                      tid->clear_ps_filter = true;
++      }
+ 
+       if (!bf_isampdu(bf)) {
+               if (!flush) {
+@@ -721,7 +727,7 @@ static void ath_tx_process_buffer(struct
+               }
+               ath_tx_complete_buf(sc, bf, txq, bf_head, sta, ts, txok);
+       } else
+-              ath_tx_complete_aggr(sc, txq, bf, bf_head, sta, ts, txok);
++              ath_tx_complete_aggr(sc, txq, bf, bf_head, sta, tid, ts, txok);
+ 
+       if (!flush)
+               ath_txq_schedule(sc, txq);