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- From: Felix Fietkau <nbd@nbd.name>
- 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 <nbd@nbd.name>
- ---
- --- 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)
-
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