mac80211: minstrel_ht: add a small optimization to minstrel_aggr_check

Check the queue mapping earlier, skb->queue_mapping is more likely than
skb->data to still be in d-cache.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

diff --git a/net/mac80211/rc80211_minstrel_ht.c b/net/mac80211/rc80211_minstrel_ht.c
index c50fd94..62ff7cf 100644 (file)
--- a/net/mac80211/rc80211_minstrel_ht.c
+++ b/net/mac80211/rc80211_minstrel_ht.c
@@ -690,6 +690,9 @@ minstrel_aggr_check(struct ieee80211_sta *pubsta, struct sk_buff *skb)
        struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
        u16 tid;
 
+       if (skb_get_queue_mapping(skb) == IEEE80211_AC_VO)
+               return;
+
        if (unlikely(!ieee80211_is_data_qos(hdr->frame_control)))
                return;
 
@@ -700,9 +703,6 @@ minstrel_aggr_check(struct ieee80211_sta *pubsta, struct sk_buff *skb)
        if (likely(sta->ampdu_mlme.tid_tx[tid]))
                return;
 
-       if (skb_get_queue_mapping(skb) == IEEE80211_AC_VO)
-               return;
-
        ieee80211_start_tx_ba_session(pubsta, tid, 5000);
 }