ath9k: remove stuck beacon detection optimization, it may be unreliable on some hardware

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@30915 3c298f89-4303-0410-b956-a3cf2f4a3e73

package/mac80211/patches/560-ath9k_optimize_beacon_tx.patch

@@ -1,129 +0,0 @@
---- a/drivers/net/wireless/ath/ath9k/beacon.c
-+++ b/drivers/net/wireless/ath/ath9k/beacon.c
-@@ -357,41 +357,12 @@ void ath_beacon_tasklet(unsigned long da
- 	struct ieee80211_vif *vif;
- 	bool edma = !!(ah->caps.hw_caps & ATH9K_HW_CAP_EDMA);
- 	int slot;
--	u32 bfaddr, bc = 0;
--
--	/*
--	 * Check if the previous beacon has gone out.  If
--	 * not don't try to post another, skip this period
--	 * and wait for the next.  Missed beacons indicate
--	 * a problem and should not occur.  If we miss too
--	 * many consecutive beacons reset the device.
--	 */
--	if (ath9k_hw_numtxpending(ah, sc->beacon.beaconq) != 0) {
--		sc->beacon.bmisscnt++;
--
--		if (sc->beacon.bmisscnt < BSTUCK_THRESH * sc->nbcnvifs) {
--			ath_dbg(common, BSTUCK,
--				"missed %u consecutive beacons\n",
--				sc->beacon.bmisscnt);
--			ath9k_hw_stop_dma_queue(ah, sc->beacon.beaconq);
--			if (sc->beacon.bmisscnt > 3)
--				ath9k_hw_bstuck_nfcal(ah);
--		} else if (sc->beacon.bmisscnt >= BSTUCK_THRESH) {
--			ath_dbg(common, BSTUCK, "beacon is officially stuck\n");
--			sc->sc_flags |= SC_OP_TSF_RESET;
--			ieee80211_queue_work(sc->hw, &sc->hw_reset_work);
--		}
--
--		return;
--	}
- 
- 	/*
- 	 * Generate beacon frames. we are sending frames
- 	 * staggered so calculate the slot for this frame based
- 	 * on the tsf to safeguard against missing an swba.
- 	 */
--
--
- 	if (ah->opmode == NL80211_IFTYPE_AP) {
- 		u16 intval;
- 		u32 tsftu;
-@@ -412,23 +383,6 @@ void ath_beacon_tasklet(unsigned long da
- 		vif = sc->beacon.bslot[slot];
- 	}
- 
--
--	bfaddr = 0;
--	if (vif) {
--		bf = ath_beacon_generate(sc->hw, vif);
--		if (bf != NULL) {
--			bfaddr = bf->bf_daddr;
--			bc = 1;
--		}
--
--		if (sc->beacon.bmisscnt != 0) {
--			ath_dbg(common, BSTUCK,
--				"resume beacon xmit after %u misses\n",
--				sc->beacon.bmisscnt);
--			sc->beacon.bmisscnt = 0;
--		}
--	}
--
- 	/*
- 	 * Handle slot time change when a non-ERP station joins/leaves
- 	 * an 11g network.  The 802.11 layer notifies us via callback,
-@@ -453,15 +407,54 @@ void ath_beacon_tasklet(unsigned long da
- 		ath9k_hw_init_global_settings(ah);
- 		sc->beacon.updateslot = OK;
- 	}
--	if (bfaddr != 0) {
--		/* NB: cabq traffic should already be queued and primed */
--		ath9k_hw_puttxbuf(ah, sc->beacon.beaconq, bfaddr);
- 
--		if (!edma)
--			ath9k_hw_txstart(ah, sc->beacon.beaconq);
-+	if (!vif)
-+		return;
-+
-+	/*
-+	 * Check if the previous beacon has gone out.  If
-+	 * not don't try to post another, skip this period
-+	 * and wait for the next.  Missed beacons indicate
-+	 * a problem and should not occur.  If we miss too
-+	 * many consecutive beacons reset the device.
-+	 */
-+	if (ath9k_hw_numtxpending(ah, sc->beacon.beaconq) != 0) {
-+		sc->beacon.bmisscnt++;
-+
-+		if (sc->beacon.bmisscnt < BSTUCK_THRESH * sc->nbcnvifs) {
-+			ath_dbg(common, BSTUCK,
-+				"missed %u consecutive beacons\n",
-+				sc->beacon.bmisscnt);
-+			ath9k_hw_stop_dma_queue(ah, sc->beacon.beaconq);
-+			if (sc->beacon.bmisscnt > 3)
-+				ath9k_hw_bstuck_nfcal(ah);
-+		} else if (sc->beacon.bmisscnt >= BSTUCK_THRESH) {
-+			ath_dbg(common, BSTUCK, "beacon is officially stuck\n");
-+			sc->sc_flags |= SC_OP_TSF_RESET;
-+			ieee80211_queue_work(sc->hw, &sc->hw_reset_work);
-+		}
-+
-+		return;
-+	}
-+
-+	bf = ath_beacon_generate(sc->hw, vif);
-+	if (!bf)
-+		return;
- 
--		sc->beacon.ast_be_xmit += bc;     /* XXX per-vif? */
-+	if (sc->beacon.bmisscnt != 0) {
-+		ath_dbg(common, BSTUCK,
-+			"resume beacon xmit after %u misses\n",
-+			sc->beacon.bmisscnt);
-+		sc->beacon.bmisscnt = 0;
- 	}
-+
-+	/* NB: cabq traffic should already be queued and primed */
-+	ath9k_hw_puttxbuf(ah, sc->beacon.beaconq, bf->bf_daddr);
-+
-+	if (!edma)
-+		ath9k_hw_txstart(ah, sc->beacon.beaconq);
-+
-+	sc->beacon.ast_be_xmit++;
- }
- 
- static void ath9k_beacon_init(struct ath_softc *sc,

package/mac80211/patches/560-ath9k_optimize_hw_check.patch

@@ -1,6 +1,6 @@
 --- a/drivers/net/wireless/ath/ath9k/beacon.c
 +++ b/drivers/net/wireless/ath/ath9k/beacon.c
-@@ -421,6 +421,9 @@ void ath_beacon_tasklet(unsigned long da
+@@ -369,6 +369,9 @@ void ath_beacon_tasklet(unsigned long da
  	if (ath9k_hw_numtxpending(ah, sc->beacon.beaconq) != 0) {
  		sc->beacon.bmisscnt++;