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From: Felix Fietkau <nbd@openwrt.org>
Date: Sat, 15 Nov 2014 22:13:38 +0100
Subject: [PATCH] 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>
---
--- a/net/mac80211/rc80211_minstrel_ht.c
+++ b/net/mac80211/rc80211_minstrel_ht.c
@@ -690,6 +690,9 @@ minstrel_aggr_check(struct ieee80211_sta
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
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);
}
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