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authorFelix Fietkau <nbd@nbd.name>2021-04-28 21:06:36 +0200
committerFelix Fietkau <nbd@nbd.name>2021-04-28 21:08:29 +0200
commit12cb52bd0665da33cb5dc64697f1751a8b33fb05 (patch)
tree9559097f4ec3aded3a394313e87f2cd0e01245ee /package
parent6f77ce77248d6458414efafd64c72d653fc70bb8 (diff)
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mac80211: minstrel_ht: fix issue in calculating success probability
Missing braces in a macro were leading to badly working rates sometimes getting a success probabilty of 1.0 Signed-off-by: Felix Fietkau <nbd@nbd.name>
Diffstat (limited to 'package')
-rw-r--r--package/kernel/mac80211/patches/subsys/353-mac80211-minstrel_ht-fix-MINSTREL_FRAC-macro.patch21
1 files changed, 21 insertions, 0 deletions
diff --git a/package/kernel/mac80211/patches/subsys/353-mac80211-minstrel_ht-fix-MINSTREL_FRAC-macro.patch b/package/kernel/mac80211/patches/subsys/353-mac80211-minstrel_ht-fix-MINSTREL_FRAC-macro.patch
new file mode 100644
index 0000000000..0d475b7329
--- /dev/null
+++ b/package/kernel/mac80211/patches/subsys/353-mac80211-minstrel_ht-fix-MINSTREL_FRAC-macro.patch
@@ -0,0 +1,21 @@
+From: Felix Fietkau <nbd@nbd.name>
+Date: Wed, 28 Apr 2021 21:03:13 +0200
+Subject: [PATCH] mac80211: minstrel_ht: fix MINSTREL_FRAC macro
+
+Add missing braces to avoid issues with e.g. using additions in the
+div expression
+
+Signed-off-by: Felix Fietkau <nbd@nbd.name>
+---
+
+--- a/net/mac80211/rc80211_minstrel_ht.h
++++ b/net/mac80211/rc80211_minstrel_ht.h
+@@ -14,7 +14,7 @@
+
+ /* scaled fraction values */
+ #define MINSTREL_SCALE 12
+-#define MINSTREL_FRAC(val, div) (((val) << MINSTREL_SCALE) / div)
++#define MINSTREL_FRAC(val, div) (((val) << MINSTREL_SCALE) / (div))
+ #define MINSTREL_TRUNC(val) ((val) >> MINSTREL_SCALE)
+
+ #define EWMA_LEVEL 96 /* ewma weighting factor [/EWMA_DIV] */