From: Felix Fietkau Date: Wed, 14 Dec 2016 20:15:33 +0100 Subject: [PATCH] mac80211: minstrel: reduce MINSTREL_SCALE The loss of a bit of extra precision does not hurt the calculation, 12 bits is still enough to calculate probabilities well. Reducing the scale makes it easier to avoid overflows Signed-off-by: Felix Fietkau --- --- a/net/mac80211/rc80211_minstrel.h +++ b/net/mac80211/rc80211_minstrel.h @@ -14,7 +14,7 @@ #define SAMPLE_COLUMNS 10 /* number of columns in sample table */ /* scaled fraction values */ -#define MINSTREL_SCALE 16 +#define MINSTREL_SCALE 12 #define MINSTREL_FRAC(val, div) (((val) << MINSTREL_SCALE) / div) #define MINSTREL_TRUNC(val) ((val) >> MINSTREL_SCALE)