1 files changed, 85 insertions, 0 deletions
diff --git a/package/kernel/mac80211/patches/322-ath9k-Send-oneshot-NoA.patch b/package/kernel/mac80211/patches/322-ath9k-Send-oneshot-NoA.patch
new file mode 100644
index 0000000000..331d714fdd
--- /dev/null
+++ b/package/kernel/mac80211/patches/322-ath9k-Send-oneshot-NoA.patch
@@ -0,0 +1,85 @@
+From: Sujith Manoharan <c_manoha@qca.qualcomm.com>
+Date: Fri, 17 Oct 2014 07:40:27 +0530
+Subject: [PATCH] ath9k: Send oneshot NoA
+
+This patch makes sure that a GO interface
+sends out a new NoA schedule with 200ms duration
+when mgd_prepare_tx() is called.
+
+Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>
+---
+
+--- a/drivers/net/wireless/ath/ath9k/ath9k.h
++++ b/drivers/net/wireless/ath/ath9k/ath9k.h
+@@ -620,6 +620,7 @@ struct ath_vif {
+ 	u32 noa_start;
+ 	u32 noa_duration;
+ 	bool periodic_noa;
++	bool oneshot_noa;
+ };
+ 
+ struct ath9k_vif_iter_data {
+--- a/drivers/net/wireless/ath/ath9k/channel.c
++++ b/drivers/net/wireless/ath/ath9k/channel.c
+@@ -450,6 +450,27 @@ static void ath_chanctx_set_periodic_noa
+ 		avp->periodic_noa);
+ }
+ 
++static void ath_chanctx_set_oneshot_noa(struct ath_softc *sc,
++					struct ath_vif *avp,
++					u32 tsf_time,
++					u32 duration)
++{
++	struct ath_common *common = ath9k_hw_common(sc->sc_ah);
++
++	avp->noa_index++;
++	avp->noa_start = tsf_time;
++	avp->periodic_noa = false;
++	avp->oneshot_noa = true;
++	avp->noa_duration = duration + sc->sched.channel_switch_time;
++
++	ath_dbg(common, CHAN_CTX,
++		"oneshot noa_duration: %d, noa_start: %d, noa_index: %d, periodic: %d\n",
++		avp->noa_duration,
++		avp->noa_start,
++		avp->noa_index,
++		avp->periodic_noa);
++}
++
+ void ath_chanctx_event(struct ath_softc *sc, struct ieee80211_vif *vif,
+ 		       enum ath_chanctx_event ev)
+ {
+@@ -476,6 +497,14 @@ void ath_chanctx_event(struct ath_softc 
+ 		if (avp->offchannel_duration)
+ 			avp->offchannel_duration = 0;
+ 
++		if (avp->oneshot_noa) {
++			avp->noa_duration = 0;
++			avp->oneshot_noa = false;
++
++			ath_dbg(common, CHAN_CTX,
++				"Clearing oneshot NoA\n");
++		}
++
+ 		if (avp->chanctx != sc->cur_chan) {
+ 			ath_dbg(common, CHAN_CTX,
+ 				"Contexts differ, not preparing beacon\n");
+@@ -551,6 +580,18 @@ void ath_chanctx_event(struct ath_softc 
+ 
+ 		ath_chanctx_handle_bmiss(sc, ctx, avp);
+ 
++		/*
++		 * If a mgd_prepare_tx() has been called by mac80211,
++		 * a one-shot NoA needs to be sent. This can happen
++		 * with one or more active channel contexts - in both
++		 * cases, a new NoA schedule has to be advertised.
++		 */
++		if (sc->sched.mgd_prepare_tx) {
++			ath_chanctx_set_oneshot_noa(sc, avp, tsf_time,
++						    jiffies_to_usecs(HZ / 5));
++			break;
++		}
++
+ 		/* Prevent wrap-around issues */
+ 		if (avp->noa_duration && tsf_time - avp->noa_start > BIT(30))
+ 			avp->noa_duration = 0;