1 files changed, 84 insertions, 0 deletions
diff --git a/package/madwifi/patches-testing/310-minstrel_sampling.patch b/package/madwifi/patches-testing/310-minstrel_sampling.patch
new file mode 100644
index 0000000000..b7f55d5005
--- /dev/null
+++ b/package/madwifi/patches-testing/310-minstrel_sampling.patch
@@ -0,0 +1,84 @@
+--- a/ath/if_ath.c
++++ b/ath/if_ath.c
+@@ -8110,6 +8110,7 @@
+ 		ath_hal_setupxtxdesc(sc->sc_ah, ds, mrr.rate1, mrr.retries1,
+ 				     mrr.rate2, mrr.retries2,
+ 				     mrr.rate3, mrr.retries3);
++		bf->rcflags = mrr.privflags;
+ 	}
+ 
+ #ifndef ATH_SUPERG_FF
+--- a/ath/if_athvar.h
++++ b/ath/if_athvar.h
+@@ -454,6 +454,7 @@
+ 	u_int16_t bf_flags;				/* tx descriptor flags */
+ 	u_int64_t bf_tsf;
+ 	int16_t bf_channoise;
++	unsigned int rcflags;
+ #ifdef ATH_SUPERG_FF
+ 	/* XXX: combine this with bf_skbaddr if it ever changes to accommodate
+ 	 *      multiple segments.
+--- a/ath_rate/minstrel/minstrel.c
++++ b/ath_rate/minstrel/minstrel.c
+@@ -341,18 +341,21 @@
+ 		if (sn->static_rate_ndx >= 0) {
+ 			    ndx = sn->static_rate_ndx;
+ 		} else {
++			int delta;
++
+ 			sn->packet_count++;
+ 			sn->random_n = (sn->a * sn->random_n) + sn->b;
+ 			offset = sn->random_n & 0xf;
+ 
+-			if ((((100 * sn->sample_count) / sn->packet_count) < 
+-					 ath_lookaround_rate) && 
+-					(offset < 2)) {
++			delta = (sn->packet_count * ath_lookaround_rate / 100) - sn->sample_count;
++			if ((delta > 0) && (offset < 2)) {
+ 				sn->sample_count++;
+ 				sn->is_sampling = 1;
+ 				if (sn->packet_count >= 10000) {
+ 					sn->sample_count = 0;
+ 					sn->packet_count = 0;
++				} else if (delta > sn->num_rates * 2) {
++					sn->sample_count += ((delta - sn->num_rates * 2) * ath_lookaround_rate) / 100;
+ 				}
+ 
+ 				/* Don't look for slowest rate (i.e. slowest
+@@ -420,11 +423,14 @@
+ 		if (sn->num_rates <= 0)
+ 			return;
+ 
++		mrr->privflags = sn->is_sampling;
+ 		if (sn->is_sampling) {
+ 			sn->is_sampling = 0;
+-			if (sn->rs_sample_rate_slower)
++			if (sn->rs_sample_rate_slower) {
+ 				rc1 = sn->rs_sample_rate;
+-			else
++				if (sn->sample_count > 0)
++					sn->sample_count--;
++			} else
+ 				rc1 = sn->max_tp_rate;
+ 		} else {
+ 			rc1 = sn->max_tp_rate2;
+@@ -552,6 +558,9 @@
+ 		if (tries <= tries1)
+ 			return;
+ 
++		if (bf->rcflags)
++			sn->sample_count++;
++
+ 		if  (tries2 < 0)
+ 			return;
+ 		tries = tries - tries1;
+--- a/net80211/ieee80211_rate.h
++++ b/net80211/ieee80211_rate.h
+@@ -87,6 +87,7 @@
+ 	int retries2;
+ 	int rate3;
+ 	int retries3;
++	int privflags;
+ };
+ 
+ struct ieee80211_rate_ops {