mac80211: minstrel: reduce MINSTREL_SCALE

Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git

kernel os linux

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>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

authored by

Felix Fietkau and committed by

Johannes Berg 9 years ago 0217eefa 1109dc39

+1 -1

1 changed file

expand all

net

mac80211

rc80211_minstrel.h

+1 -1

net/mac80211/rc80211_minstrel.h

··· 14 14 #define SAMPLE_COLUMNS 10 /* number of columns in sample table */ 15 15 16 16 /* scaled fraction values */ 17 - #define MINSTREL_SCALE 16 17 + #define MINSTREL_SCALE 12 18 18 #define MINSTREL_FRAC(val, div) (((val) << MINSTREL_SCALE) / div) 19 19 #define MINSTREL_TRUNC(val) ((val) >> MINSTREL_SCALE) 20 20