57 lines
1.9 KiB
Diff
57 lines
1.9 KiB
Diff
From: Felix Fietkau <nbd@nbd.name>
|
|
Date: Thu, 1 Mar 2018 13:28:48 +0100
|
|
Subject: [PATCH] mac80211: minstrel: fix sampling/reporting of CCK rates
|
|
in HT mode
|
|
|
|
Long/short preamble selection cannot be sampled separately, since it
|
|
depends on the BSS state. Because of that, sampling attempts to
|
|
currently not used preamble modes are not counted in the statistics,
|
|
which leads to CCK rates being sampled too often.
|
|
|
|
Fix statistics accounting for long/short preamble by increasing the
|
|
index where necessary.
|
|
Fix excessive CCK rate sampling by dropping unsupported sample attempts.
|
|
|
|
This improves throughput on 2.4 GHz channels
|
|
|
|
Signed-off-by: Felix Fietkau <nbd@nbd.name>
|
|
---
|
|
|
|
--- a/net/mac80211/rc80211_minstrel_ht.c
|
|
+++ b/net/mac80211/rc80211_minstrel_ht.c
|
|
@@ -281,7 +281,8 @@ minstrel_ht_get_stats(struct minstrel_pr
|
|
break;
|
|
|
|
/* short preamble */
|
|
- if (!(mi->supported[group] & BIT(idx)))
|
|
+ if ((mi->supported[group] & BIT(idx + 4)) &&
|
|
+ (rate->flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE))
|
|
idx += 4;
|
|
}
|
|
return &mi->groups[group].rates[idx];
|
|
@@ -1080,18 +1081,22 @@ minstrel_ht_get_rate(void *priv, struct
|
|
return;
|
|
|
|
sample_group = &minstrel_mcs_groups[sample_idx / MCS_GROUP_RATES];
|
|
+ sample_idx %= MCS_GROUP_RATES;
|
|
+
|
|
+ if ((sample_idx >= 4) != txrc->short_preamble)
|
|
+ return;
|
|
+
|
|
info->flags |= IEEE80211_TX_CTL_RATE_CTRL_PROBE;
|
|
rate->count = 1;
|
|
|
|
- if (sample_idx / MCS_GROUP_RATES == MINSTREL_CCK_GROUP) {
|
|
+ if (sample_group == &minstrel_mcs_groups[MINSTREL_CCK_GROUP]) {
|
|
int idx = sample_idx % ARRAY_SIZE(mp->cck_rates);
|
|
rate->idx = mp->cck_rates[idx];
|
|
} else if (sample_group->flags & IEEE80211_TX_RC_VHT_MCS) {
|
|
ieee80211_rate_set_vht(rate, sample_idx % MCS_GROUP_RATES,
|
|
sample_group->streams);
|
|
} else {
|
|
- rate->idx = sample_idx % MCS_GROUP_RATES +
|
|
- (sample_group->streams - 1) * 8;
|
|
+ rate->idx = sample_idx + (sample_group->streams - 1) * 8;
|
|
}
|
|
|
|
rate->flags = sample_group->flags;
|