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authorFelix Fietkau <nbd@nbd.name>2021-06-17 12:40:15 +0200
committerFelix Fietkau <nbd@nbd.name>2021-06-17 12:41:06 +0200
commitdb9784beddd01ef960833b6ad6696eb581faf605 (patch)
tree2e2457587e665da0965f145aad09118ffe9f9355
parenta0f97d8f9cb068305319012b50de092ee01ad7a1 (diff)
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mac80211: fix minstrel 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 Signed-off-by: Felix Fietkau <nbd@nbd.name>
-rw-r--r--package/kernel/mac80211/patches/subsys/377-mac80211-minstrel_ht-fix-sample-time-check.patch23
1 files changed, 23 insertions, 0 deletions
diff --git a/package/kernel/mac80211/patches/subsys/377-mac80211-minstrel_ht-fix-sample-time-check.patch b/package/kernel/mac80211/patches/subsys/377-mac80211-minstrel_ht-fix-sample-time-check.patch
new file mode 100644
index 0000000000..787254b4df
--- /dev/null
+++ b/package/kernel/mac80211/patches/subsys/377-mac80211-minstrel_ht-fix-sample-time-check.patch
@@ -0,0 +1,23 @@
+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;