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mac80211: minstrel_ht: improve sample rate selection

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Always allow sampling of rates faster than the primary max throughput rate.
When the second max_tp_rate is higher than the first one, sample attempts were
previously skipped, potentially causing rate control to get stuck at a slightly
lower rate

Signed-off-by: Felix Fietkau <nbd@nbd.name>
Link: https://lore.kernel.org/r/20210115120242.89616-7-nbd@nbd.name
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Felix Fietkau 2021-01-15 13:02:39 +01:00 committed by Johannes Berg
parent 1ae8bba9a2
commit 019c6fc278
1 changed files with 3 additions and 3 deletions
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6
net/mac80211/rc80211_minstrel_ht.c
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@ -1379,13 +1379,13 @@ minstrel_get_sample_rate(struct minstrel_priv *mp, struct minstrel_ht_sta *mi)
mrs = &mg->rates[sample_idx];
sample_idx += sample_group * MCS_GROUP_RATES;
/* Set tp_rate1, tp_rate2 to the highest / second highest max_tp_rate */
tp_rate1 = mi->max_tp_rate[0];
/* Set tp_rate2 to the second highest max_tp_rate */
if (minstrel_get_duration(mi->max_tp_rate[0]) >
minstrel_get_duration(mi->max_tp_rate[1])) {
tp_rate1 = mi->max_tp_rate[1];
tp_rate2 = mi->max_tp_rate[0];
} else {
tp_rate1 = mi->max_tp_rate[0];
tp_rate2 = mi->max_tp_rate[1];
}