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] */