This is a note to let you know that I've just added the patch titled
mac80211: minstrel_ht: fix sample time check
to the 5.12-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
mac80211-minstrel_ht-fix-sample-time-check.patch
and it can be found in the queue-5.12 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 1236af327af476731aa548dfcbbefb1a3ec6726a Mon Sep 17 00:00:00 2001
From: Felix Fietkau <nbd@xxxxxxxx>
Date: Thu, 17 Jun 2021 12:38:54 +0200
Subject: mac80211: minstrel_ht: fix sample time check
From: Felix Fietkau <nbd@xxxxxxxx>
commit 1236af327af476731aa548dfcbbefb1a3ec6726a upstream.
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: stable@xxxxxxxxxxxxxxx
Signed-off-by: Felix Fietkau <nbd@xxxxxxxx>
Link: https://lore.kernel.org/r/20210617103854.61875-1-nbd@xxxxxxxx
Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
net/mac80211/rc80211_minstrel_ht.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/net/mac80211/rc80211_minstrel_ht.c
+++ b/net/mac80211/rc80211_minstrel_ht.c
@@ -1516,7 +1516,7 @@ 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;
Patches currently in stable-queue which might be from nbd@xxxxxxxx are
queue-5.12/mac80211-minstrel_ht-fix-sample-time-check.patch
