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-rw-r--r--net/mac80211/rc80211_minstrel.h7
1 files changed, 6 insertions, 1 deletions
diff --git a/net/mac80211/rc80211_minstrel.h b/net/mac80211/rc80211_minstrel.h
index 0083036161af..9c85a610b57b 100644
--- a/net/mac80211/rc80211_minstrel.h
+++ b/net/mac80211/rc80211_minstrel.h
@@ -27,7 +27,12 @@
static inline int
minstrel_ewma(int old, int new, int weight)
{
- return (new * (EWMA_DIV - weight) + old * weight) / EWMA_DIV;
+ int diff, incr;
+
+ diff = new - old;
+ incr = (EWMA_DIV - weight) * diff / EWMA_DIV;
+
+ return old + incr;
}
struct minstrel_rate_stats {