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[PATCH 3/3] mac80211/minstrel_ht: do not sample actively used rates

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max_tp_rate2 and max_prob_rate tend to get used occasionally during
retransmission, which is more useful for the statistics than probing
with individual probe packets.

Signed-off-by: Felix Fietkau <nbd@xxxxxxxxxxx>
---
 net/mac80211/rc80211_minstrel_ht.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/net/mac80211/rc80211_minstrel_ht.c b/net/mac80211/rc80211_minstrel_ht.c
index 0fc9449..d2b264d 100644
--- a/net/mac80211/rc80211_minstrel_ht.c
+++ b/net/mac80211/rc80211_minstrel_ht.c
@@ -648,10 +648,13 @@ minstrel_get_sample_rate(struct minstrel_priv *mp, struct minstrel_ht_sta *mi)
 	/*
 	 * Sampling might add some overhead (RTS, no aggregation)
 	 * to the frame. Hence, don't use sampling for the currently
-	 * used max TP rate.
+	 * used rates.
 	 */
-	if (sample_idx == mi->max_tp_rate)
+	if (sample_idx == mi->max_tp_rate ||
+	    sample_idx == mi->max_tp_rate2 ||
+	    sample_idx == mi->max_prob_rate)
 		return -1;
+
 	/*
 	 * Do not sample if the probability is already higher than 95%
 	 * to avoid wasting airtime.
-- 
1.8.0.2

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