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