1 files changed, 80 insertions, 0 deletions
diff --git a/package/madwifi/patches/345-minstrel_sampling.patch b/package/madwifi/patches/345-minstrel_sampling.patch
new file mode 100644
index 000000000..63fcb8a61
--- /dev/null
+++ b/package/madwifi/patches/345-minstrel_sampling.patch
@@ -0,0 +1,80 @@
+--- a/ath/if_ath.c
++++ b/ath/if_ath.c
+@@ -8103,6 +8103,7 @@ ath_tx_start(struct net_device *dev, str
+ 		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
+@@ -446,6 +446,7 @@ struct ath_buf {
+ 	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
+@@ -333,15 +333,19 @@ ath_rate_findrate(struct ath_softc *sc,
+ 		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->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
+@@ -398,11 +402,14 @@ ath_rate_get_mrr(struct ath_softc *sc, s
+ 		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;
+@@ -525,6 +532,9 @@ ath_rate_tx_complete(struct ath_softc *s
+ 		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 @@ struct ieee80211_mrr {
+ 	int retries2;
+ 	int rate3;
+ 	int retries3;
++	int privflags;
+ };
+ 
+ struct ieee80211_rate_ops {