From da27ab47b39f2ce943e83d0c15f936e7d0529663 Mon Sep 17 00:00:00 2001
From: nbd <nbd@3c298f89-4303-0410-b956-a3cf2f4a3e73>
Date: Wed, 9 Mar 2011 03:41:22 +0000
Subject: mac80211: fix minstrel_ht sampling intervals (patch by Daniel
 Halperin)

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@25964 3c298f89-4303-0410-b956-a3cf2f4a3e73
---
 .../560-mac80211_minstrel_ht_sampling_fix.patch    | 50 ++++++++++++++++++++++
 1 file changed, 50 insertions(+)
 create mode 100644 package/mac80211/patches/560-mac80211_minstrel_ht_sampling_fix.patch

(limited to 'package')

diff --git a/package/mac80211/patches/560-mac80211_minstrel_ht_sampling_fix.patch b/package/mac80211/patches/560-mac80211_minstrel_ht_sampling_fix.patch
new file mode 100644
index 000000000..011f87ad3
--- /dev/null
+++ b/package/mac80211/patches/560-mac80211_minstrel_ht_sampling_fix.patch
@@ -0,0 +1,50 @@
+--- a/net/mac80211/rc80211_minstrel_ht.c
++++ b/net/mac80211/rc80211_minstrel_ht.c
+@@ -415,10 +415,8 @@ minstrel_ht_tx_status(void *priv, struct
+ 		mi->sample_count--;
+ 	}
+ 
+-	if (info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE) {
++	if (info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE)
+ 		mi->sample_packets += info->status.ampdu_len;
+-		minstrel_next_sample_idx(mi);
+-	}
+ 
+ 	for (i = 0; !last; i++) {
+ 		last = (i == IEEE80211_TX_MAX_RATES - 1) ||
+@@ -553,13 +551,14 @@ minstrel_get_sample_rate(struct minstrel
+ 	sample_idx = sample_table[mg->column][mg->index];
+ 	mr = &mg->rates[sample_idx];
+ 	sample_idx += mi->sample_group * MCS_GROUP_RATES;
++	minstrel_next_sample_idx(mi);
+ 
+ 	/*
+ 	 * When not using MRR, do not sample if the probability is already
+ 	 * higher than 95% to avoid wasting airtime
+ 	 */
+ 	if (!mp->has_mrr && (mr->probability > MINSTREL_FRAC(95, 100)))
+-		goto next;
++		return -1;
+ 
+ 	/*
+ 	 * Make sure that lower rates get sampled only occasionally,
+@@ -568,17 +567,13 @@ minstrel_get_sample_rate(struct minstrel
+ 	if (minstrel_get_duration(sample_idx) >
+ 	    minstrel_get_duration(mi->max_tp_rate)) {
+ 		if (mr->sample_skipped < 20)
+-			goto next;
++			return -1;
+ 
+ 		if (mi->sample_slow++ > 2)
+-			goto next;
++			return -1;
+ 	}
+ 
+ 	return sample_idx;
+-
+-next:
+-	minstrel_next_sample_idx(mi);
+-	return -1;
+ }
+ 
+ static void
-- 
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