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authorThomas Huehn <thomas@net.t-labs.tu-berlin.de>2013-03-05 02:30:02 +0400
committerJohannes Berg <johannes.berg@intel.com>2013-03-06 19:36:07 +0400
commitc8ca8c2f933a516b5f4586d7dc6055b72107f246 (patch)
tree87a1285588a6dcec2926e804e52fdc4d9bf8fba6 /net/mac80211/rc80211_minstrel.c
parenta512d4b543ea20ec84f712f90a5229ab88a9709c (diff)
downloadlinux-c8ca8c2f933a516b5f4586d7dc6055b72107f246.tar.xz
mac80211: merge value scaling macros of minstrel_ht and minstrel
Both minstrel versions use individual ways to scale up integer values to perform calculations. Merge minstrel_ht's scaling macros into minstrels header file and use them in both minstrel versions. Acked-by: Felix Fietkau <nbd@openwrt.org> Signed-off-by: Thomas Huehn <thomas@net.t-labs.tu-berlin.de> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/mac80211/rc80211_minstrel.c')
-rw-r--r--net/mac80211/rc80211_minstrel.c9
1 files changed, 4 insertions, 5 deletions
diff --git a/net/mac80211/rc80211_minstrel.c b/net/mac80211/rc80211_minstrel.c
index d78f629179c7..c9b990237991 100644
--- a/net/mac80211/rc80211_minstrel.c
+++ b/net/mac80211/rc80211_minstrel.c
@@ -86,10 +86,8 @@ minstrel_update_stats(struct minstrel_priv *mp, struct minstrel_sta_info *mi)
if (!usecs)
usecs = 1000000;
- /* To avoid rounding issues, probabilities scale from 0 (0%)
- * to 18000 (100%) */
if (mr->attempts) {
- mr->cur_prob = (mr->success * 18000) / mr->attempts;
+ mr->cur_prob = MINSTREL_FRAC(mr->success, mr->attempts);
mr->succ_hist += mr->success;
mr->att_hist += mr->attempts;
mr->probability = minstrel_ewma(mr->probability,
@@ -105,7 +103,8 @@ minstrel_update_stats(struct minstrel_priv *mp, struct minstrel_sta_info *mi)
/* Sample less often below the 10% chance of success.
* Sample less often above the 95% chance of success. */
- if ((mr->probability > 17100) || (mr->probability < 1800)) {
+ if (mr->probability > MINSTREL_FRAC(95, 100) ||
+ mr->probability < MINSTREL_FRAC(10, 100)) {
mr->adjusted_retry_count = mr->retry_count >> 1;
if (mr->adjusted_retry_count > 2)
mr->adjusted_retry_count = 2;
@@ -300,7 +299,7 @@ minstrel_get_rate(void *priv, struct ieee80211_sta *sta,
/* If we're not using MRR and the sampling rate already
* has a probability of >95%, we shouldn't be attempting
* to use it, as this only wastes precious airtime */
- if (!mrr && sample && (mi->r[ndx].probability > 17100))
+ if (!mrr && sample && (mi->r[ndx].probability > MINSTREL_FRAC(95, 100)))
ndx = mi->max_tp_rate;
ar[0].idx = mi->r[ndx].rix;