package/kernel/mac80211/patches/313-mac80211-minstrel_ht-add-a-small-optimization-to-min.patch

   1 From: Felix Fietkau <nbd@openwrt.org>
   2 Date: Sat, 15 Nov 2014 22:13:38 +0100
   3 Subject: [PATCH] mac80211: minstrel_ht: add a small optimization to
   4  minstrel_aggr_check
   5
   6 Check the queue mapping earlier, skb->queue_mapping is more likely than
   7 skb->data to still be in d-cache.
   8
   9 Signed-off-by: Felix Fietkau <nbd@openwrt.org>
  10 ---
  11
  12 --- a/net/mac80211/rc80211_minstrel_ht.c
  13 +++ b/net/mac80211/rc80211_minstrel_ht.c
  14 @@ -690,6 +690,9 @@ minstrel_aggr_check(struct ieee80211_sta
  15         struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
  16         u16 tid;
  17
  18 +       if (skb_get_queue_mapping(skb) == IEEE80211_AC_VO)
  19 +               return;
  20 +
  21         if (unlikely(!ieee80211_is_data_qos(hdr->frame_control)))
  22                 return;
  23
  24 @@ -700,9 +703,6 @@ minstrel_aggr_check(struct ieee80211_sta
  25         if (likely(sta->ampdu_mlme.tid_tx[tid]))
  26                 return;
  27
  28 -       if (skb_get_queue_mapping(skb) == IEEE80211_AC_VO)
  29 -               return;
  30 -
  31         ieee80211_start_tx_ba_session(pubsta, tid, 5000);
  32  }
  33