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mac80211: fix minstrel sample time check

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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

Signed-off-by: Felix Fietkau <nbd@nbd.name>
This commit is contained in:
Felix Fietkau 2021-06-17 12:40:15 +02:00
parent a0f97d8f9c
commit db9784bedd
1 changed files with 23 additions and 0 deletions
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package/kernel/mac80211/patches/subsys/377-mac80211-minstrel_ht-fix-sample-time-check.patch Normal file
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From: Felix Fietkau <nbd@nbd.name>
Date: Thu, 17 Jun 2021 12:05:54 +0200
Subject: [PATCH] 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")
Signed-off-by: Felix Fietkau <nbd@nbd.name>
---
--- a/net/mac80211/rc80211_minstrel_ht.c
+++ b/net/mac80211/rc80211_minstrel_ht.c
@@ -1498,7 +1498,7 @@ minstrel_ht_get_rate(void *priv, struct
(info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO))
return;
- if (time_is_before_jiffies(mi->sample_time))
+ if (time_is_after_jiffies(mi->sample_time))
return;
mi->sample_time = jiffies + MINSTREL_SAMPLE_INTERVAL;