package/kernel/mac80211/patches/subsys/377-mac80211-minstrel_ht-fix-sample-time-check.patch

   1 From: Felix Fietkau <nbd@nbd.name>
   2 Date: Thu, 17 Jun 2021 12:05:54 +0200
   3 Subject: [PATCH] mac80211: minstrel_ht: fix sample time check
   4
   5 We need to skip sampling if the next sample time is after jiffies, not before.
   6 This patch fixes an issue where in some cases only very little sampling (or none
   7 at all) is performed, leading to really bad data rates
   8
   9 Fixes: 80d55154b2f8 ("mac80211: minstrel_ht: significantly redesign the rate probing strategy")
  10 Signed-off-by: Felix Fietkau <nbd@nbd.name>
  11 ---
  12
  13 --- a/net/mac80211/rc80211_minstrel_ht.c
  14 +++ b/net/mac80211/rc80211_minstrel_ht.c
  15 @@ -1498,7 +1498,7 @@ minstrel_ht_get_rate(void *priv, struct
  16             (info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO))
  17                 return;
  18
  19 -       if (time_is_before_jiffies(mi->sample_time))
  20 +       if (time_is_after_jiffies(mi->sample_time))
  21                 return;
  22
  23         mi->sample_time = jiffies + MINSTREL_SAMPLE_INTERVAL;