2021-06-17 10:44:01

by Felix Fietkau

[permalink] [raw]
Subject: [PATCH 5.13] mac80211: minstrel_ht: fix sample time check

We need to skip sampling if the next sample time is after jiffies, not before.
This patch fixes an issue where in some cases only very little sampling (or none
at all) is performed, leading to really bad data rates

Fixes: 80d55154b2f8 ("mac80211: minstrel_ht: significantly redesign the rate probing strategy")
Cc: [email protected]
Signed-off-by: Felix Fietkau <[email protected]>
net/mac80211/rc80211_minstrel_ht.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/mac80211/rc80211_minstrel_ht.c b/net/mac80211/rc80211_minstrel_ht.c
index 6487b05da6fa..a6f3fb4a9197 100644
--- a/net/mac80211/rc80211_minstrel_ht.c
+++ b/net/mac80211/rc80211_minstrel_ht.c
@@ -1514,7 +1514,7 @@ minstrel_ht_get_rate(void *priv, struct ieee80211_sta *sta, void *priv_sta,
(info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO))

- if (time_is_before_jiffies(mi->sample_time))
+ if (time_is_after_jiffies(mi->sample_time))

mi->sample_time = jiffies + MINSTREL_SAMPLE_INTERVAL;