Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next into for-davem

22 files changed, 735 insertions, 190 deletions

diff --git a/drivers/net/wireless/ath/ath.h b/drivers/net/wireless/ath/ath.h
index 4596c33..c1d699f 100644
--- a/drivers/net/wireless/ath/ath.h
+++ b/drivers/net/wireless/ath/ath.h
@@ -152,6 +152,7 @@ struct ath_common {
 	struct ath_cycle_counters cc_survey;
 
 	struct ath_regulatory regulatory;
+	struct ath_regulatory reg_world_copy;
 	const struct ath_ops *ops;
 	const struct ath_bus_ops *bus_ops;
 
@@ -214,6 +215,10 @@ do {								\
  * @ATH_DBG_HWTIMER: hardware timer handling
  * @ATH_DBG_BTCOEX: bluetooth coexistance
  * @ATH_DBG_BSTUCK: stuck beacons
+ * @ATH_DBG_MCI: Message Coexistence Interface, a private protocol
+ *	used exclusively for WLAN-BT coexistence starting from
+ *	AR9462.
+ * @ATH_DBG_DFS: radar datection
  * @ATH_DBG_ANY: enable all debugging
  *
  * The debug level is used to control the amount and type of debugging output
@@ -240,6 +245,7 @@ enum ATH_DEBUG {
 	ATH_DBG_WMI		= 0x00004000,
 	ATH_DBG_BSTUCK		= 0x00008000,
 	ATH_DBG_MCI		= 0x00010000,
+	ATH_DBG_DFS		= 0x00020000,
 	ATH_DBG_ANY		= 0xffffffff
 };
 
diff --git a/drivers/net/wireless/ath/ath9k/Kconfig b/drivers/net/wireless/ath/ath9k/Kconfig
index 7b4c074..1b4786a 100644
--- a/drivers/net/wireless/ath/ath9k/Kconfig
+++ b/drivers/net/wireless/ath/ath9k/Kconfig
@@ -2,6 +2,9 @@ config ATH9K_HW
 	tristate
 config ATH9K_COMMON
 	tristate
+config ATH9K_DFS_DEBUGFS
+	def_bool y
+	depends on ATH9K_DEBUGFS && ATH9K_DFS_CERTIFIED
 
 config ATH9K
 	tristate "Atheros 802.11n wireless cards support"
@@ -51,6 +54,25 @@ config ATH9K_DEBUGFS
 
 	  Also required for changing debug message flags at run time.
 
+config ATH9K_DFS_CERTIFIED
+	bool "Atheros DFS support for certified platforms"
+	depends on ATH9K && EXPERT
+	default n
+	---help---
+	  This option enables DFS support for initiating radiation on
+	  ath9k. There is no way to dynamically detect if a card was DFS
+	  certified and as such this is left as a build time option. This
+	  option should only be enabled by system integrators that can
+	  guarantee that all the platforms that their kernel will run on
+	  have obtained appropriate regulatory body certification for a
+	  respective Atheros card by using ath9k on the target shipping
+	  platforms.
+
+	  This is currently only a placeholder for future DFS support,
+	  as DFS support requires more components that still need to be
+	  developed. At this point enabling this option won't do anything
+	  except increase code size.
+
 config ATH9K_RATE_CONTROL
 	bool "Atheros ath9k rate control"
 	depends on ATH9K
diff --git a/drivers/net/wireless/ath/ath9k/Makefile b/drivers/net/wireless/ath/ath9k/Makefile
index 390797d..da02242 100644
--- a/drivers/net/wireless/ath/ath9k/Makefile
+++ b/drivers/net/wireless/ath/ath9k/Makefile
@@ -10,6 +10,8 @@ ath9k-$(CONFIG_ATH9K_RATE_CONTROL) += rc.o
 ath9k-$(CONFIG_ATH9K_PCI) += pci.o
 ath9k-$(CONFIG_ATH9K_AHB) += ahb.o
 ath9k-$(CONFIG_ATH9K_DEBUGFS) += debug.o
+ath9k-$(CONFIG_ATH9K_DFS_DEBUGFS) += dfs_debug.o
+ath9k-$(CONFIG_ATH9K_DFS_CERTIFIED) += dfs.o
 
 obj-$(CONFIG_ATH9K) += ath9k.o
 
diff --git a/drivers/net/wireless/ath/ath9k/ar9003_mac.c b/drivers/net/wireless/ath/ath9k/ar9003_mac.c
index 95587e3..631fe4f 100644
--- a/drivers/net/wireless/ath/ath9k/ar9003_mac.c
+++ b/drivers/net/wireless/ath/ath9k/ar9003_mac.c
@@ -187,40 +187,12 @@ static bool ar9003_hw_get_isr(struct ath_hw *ah, enum ath9k_int *masked)
 			isr = REG_READ(ah, AR_ISR);
 	}
 
-	if (async_cause & AR_INTR_ASYNC_MASK_MCI) {
-		u32 raw_intr, rx_msg_intr;
-
-		rx_msg_intr = REG_READ(ah, AR_MCI_INTERRUPT_RX_MSG_RAW);
-		raw_intr = REG_READ(ah, AR_MCI_INTERRUPT_RAW);
-
-		if ((raw_intr == 0xdeadbeef) || (rx_msg_intr == 0xdeadbeef))
-			ath_dbg(common, ATH_DBG_MCI,
-				"MCI gets 0xdeadbeef during MCI int processing"
-				"new raw_intr=0x%08x, new rx_msg_raw=0x%08x, "
-				"raw_intr=0x%08x, rx_msg_raw=0x%08x\n",
-				raw_intr, rx_msg_intr, mci->raw_intr,
-				mci->rx_msg_intr);
-		else {
-			mci->rx_msg_intr |= rx_msg_intr;
-			mci->raw_intr |= raw_intr;
-			*masked |= ATH9K_INT_MCI;
-
-			if (rx_msg_intr & AR_MCI_INTERRUPT_RX_MSG_CONT_INFO)
-				mci->cont_status =
-					REG_READ(ah, AR_MCI_CONT_STATUS);
-
-			REG_WRITE(ah, AR_MCI_INTERRUPT_RX_MSG_RAW, rx_msg_intr);
-			REG_WRITE(ah, AR_MCI_INTERRUPT_RAW, raw_intr);
-			ath_dbg(common, ATH_DBG_MCI, "AR_INTR_SYNC_MCI\n");
-
-		}
-	}
 
 	sync_cause = REG_READ(ah, AR_INTR_SYNC_CAUSE) & AR_INTR_SYNC_DEFAULT;
 
 	*masked = 0;
 
-	if (!isr && !sync_cause)
+	if (!isr && !sync_cause && !async_cause)
 		return false;
 
 	if (isr) {
@@ -326,6 +298,35 @@ static bool ar9003_hw_get_isr(struct ath_hw *ah, enum ath9k_int *masked)
 			ar9003_hw_bb_watchdog_read(ah);
 	}
 
+	if (async_cause & AR_INTR_ASYNC_MASK_MCI) {
+		u32 raw_intr, rx_msg_intr;
+
+		rx_msg_intr = REG_READ(ah, AR_MCI_INTERRUPT_RX_MSG_RAW);
+		raw_intr = REG_READ(ah, AR_MCI_INTERRUPT_RAW);
+
+		if ((raw_intr == 0xdeadbeef) || (rx_msg_intr == 0xdeadbeef))
+			ath_dbg(common, ATH_DBG_MCI,
+				"MCI gets 0xdeadbeef during MCI int processing"
+				"new raw_intr=0x%08x, new rx_msg_raw=0x%08x, "
+				"raw_intr=0x%08x, rx_msg_raw=0x%08x\n",
+				raw_intr, rx_msg_intr, mci->raw_intr,
+				mci->rx_msg_intr);
+		else {
+			mci->rx_msg_intr |= rx_msg_intr;
+			mci->raw_intr |= raw_intr;
+			*masked |= ATH9K_INT_MCI;
+
+			if (rx_msg_intr & AR_MCI_INTERRUPT_RX_MSG_CONT_INFO)
+				mci->cont_status =
+					REG_READ(ah, AR_MCI_CONT_STATUS);
+
+			REG_WRITE(ah, AR_MCI_INTERRUPT_RX_MSG_RAW, rx_msg_intr);
+			REG_WRITE(ah, AR_MCI_INTERRUPT_RAW, raw_intr);
+			ath_dbg(common, ATH_DBG_MCI, "AR_INTR_SYNC_MCI\n");
+
+		}
+	}
+
 	if (sync_cause) {
 		if (sync_cause & AR_INTR_SYNC_RADM_CPL_TIMEOUT) {
 			REG_WRITE(ah, AR_RC, AR_RC_HOSTIF);
diff --git a/drivers/net/wireless/ath/ath9k/ath9k.h b/drivers/net/wireless/ath/ath9k/ath9k.h
index afc156a..130e5db 100644
--- a/drivers/net/wireless/ath/ath9k/ath9k.h
+++ b/drivers/net/wireless/ath/ath9k/ath9k.h
@@ -159,6 +159,9 @@ void ath_descdma_cleanup(struct ath_softc *sc, struct ath_descdma *dd,
 /* return block-ack bitmap index given sequence and starting sequence */
 #define ATH_BA_INDEX(_st, _seq) (((_seq) - (_st)) & (IEEE80211_SEQ_MAX - 1))
 
+/* return the seqno for _start + _offset */
+#define ATH_BA_INDEX2SEQ(_seq, _offset) (((_seq) + (_offset)) & (IEEE80211_SEQ_MAX - 1))
+
 /* returns delimiter padding required given the packet length */
 #define ATH_AGGR_GET_NDELIM(_len)					\
        (((_len) >= ATH_AGGR_MINPLEN) ? 0 :                             \
@@ -238,6 +241,7 @@ struct ath_atx_tid {
 	struct ath_node *an;
 	struct ath_atx_ac *ac;
 	unsigned long tx_buf[BITS_TO_LONGS(ATH_TID_MAX_BUFS)];
+	int bar_index;
 	u16 seq_start;
 	u16 seq_next;
 	u16 baw_size;
@@ -252,9 +256,9 @@ struct ath_atx_tid {
 struct ath_node {
 #ifdef CONFIG_ATH9K_DEBUGFS
 	struct list_head list; /* for sc->nodes */
+#endif
 	struct ieee80211_sta *sta; /* station struct we're part of */
 	struct ieee80211_vif *vif; /* interface with which we're associated */
-#endif
 	struct ath_atx_tid tid[WME_NUM_TID];
 	struct ath_atx_ac ac[WME_NUM_AC];
 	int ps_key;
@@ -276,7 +280,6 @@ struct ath_tx_control {
 };
 
 #define ATH_TX_ERROR        0x01
-#define ATH_TX_BAR          0x02
 
 /**
  * @txq_map:  Index is mac80211 queue number.  This is
@@ -542,7 +545,7 @@ struct ath_ant_comb {
 #define DEFAULT_CACHELINE       32
 #define ATH_REGCLASSIDS_MAX     10
 #define ATH_CABQ_READY_TIME     80      /* % of beacon interval */
-#define ATH_MAX_SW_RETRIES      10
+#define ATH_MAX_SW_RETRIES      30
 #define ATH_CHAN_MAX            255
 
 #define ATH_TXPOWER_MAX         100     /* .5 dBm units */
diff --git a/drivers/net/wireless/ath/ath9k/debug.c b/drivers/net/wireless/ath/ath9k/debug.c
index 6fb719d..68d972b 100644
--- a/drivers/net/wireless/ath/ath9k/debug.c
+++ b/drivers/net/wireless/ath/ath9k/debug.c
@@ -856,7 +856,7 @@ void ath_debug_stat_tx(struct ath_softc *sc, struct ath_buf *bf,
 	sc->debug.stats.txstats[qnum].tx_bytes_all += bf->bf_mpdu->len;
 
 	if (bf_isampdu(bf)) {
-		if (flags & ATH_TX_BAR)
+		if (flags & ATH_TX_ERROR)
 			TX_STAT_INC(qnum, a_xretries);
 		else
 			TX_STAT_INC(qnum, a_completed);
@@ -1630,6 +1630,9 @@ int ath9k_init_debug(struct ath_hw *ah)
 	debugfs_create_file("debug", S_IRUSR | S_IWUSR, sc->debug.debugfs_phy,
 			    sc, &fops_debug);
 #endif
+
+	ath9k_dfs_init_debug(sc);
+
 	debugfs_create_file("dma", S_IRUSR, sc->debug.debugfs_phy, sc,
 			    &fops_dma);
 	debugfs_create_file("interrupt", S_IRUSR, sc->debug.debugfs_phy, sc,
diff --git a/drivers/net/wireless/ath/ath9k/debug.h b/drivers/net/wireless/ath/ath9k/debug.h
index 356352a..776a24a 100644
--- a/drivers/net/wireless/ath/ath9k/debug.h
+++ b/drivers/net/wireless/ath/ath9k/debug.h
@@ -19,6 +19,7 @@
 
 #include "hw.h"
 #include "rc.h"
+#include "dfs_debug.h"
 
 struct ath_txq;
 struct ath_buf;
@@ -187,6 +188,7 @@ struct ath_stats {
 	struct ath_interrupt_stats istats;
 	struct ath_tx_stats txstats[ATH9K_NUM_TX_QUEUES];
 	struct ath_rx_stats rxstats;
+	struct ath_dfs_stats dfs_stats;
 	u32 reset[__RESET_TYPE_MAX];
 };
 
diff --git a/drivers/net/wireless/ath/ath9k/dfs.c b/drivers/net/wireless/ath/ath9k/dfs.c
new file mode 100644
index 0000000..e4e84a9
--- /dev/null
+++ b/drivers/net/wireless/ath/ath9k/dfs.c
@@ -0,0 +1,215 @@
+/*
+ * Copyright (c) 2008-2011 Atheros Communications Inc.
+ * Copyright (c) 2011 Neratec Solutions AG
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include "hw.h"
+#include "hw-ops.h"
+#include "ath9k.h"
+#include "dfs.h"
+#include "dfs_debug.h"
+
+/*
+ * TODO: move into or synchronize this with generic header
+ *	 as soon as IF is defined
+ */
+struct dfs_radar_pulse {
+	u16 freq;
+	u64 ts;
+	u32 width;
+	u8 rssi;
+};
+
+/* internal struct to pass radar data */
+struct ath_radar_data {
+	u8 pulse_bw_info;
+	u8 rssi;
+	u8 ext_rssi;
+	u8 pulse_length_ext;
+	u8 pulse_length_pri;
+};
+
+/* convert pulse duration to usecs, considering clock mode */
+static u32 dur_to_usecs(struct ath_hw *ah, u32 dur)
+{
+	const u32 AR93X_NSECS_PER_DUR = 800;
+	const u32 AR93X_NSECS_PER_DUR_FAST = (8000 / 11);
+	u32 nsecs;
+
+	if (IS_CHAN_A_FAST_CLOCK(ah, ah->curchan))
+		nsecs = dur * AR93X_NSECS_PER_DUR_FAST;
+	else
+		nsecs = dur * AR93X_NSECS_PER_DUR;
+
+	return (nsecs + 500) / 1000;
+}
+
+#define PRI_CH_RADAR_FOUND 0x01
+#define EXT_CH_RADAR_FOUND 0x02
+static bool
+ath9k_postprocess_radar_event(struct ath_softc *sc,
+			      struct ath_radar_data *are,
+			      struct dfs_radar_pulse *drp)
+{
+	u8 rssi;
+	u16 dur;
+
+	ath_dbg(ath9k_hw_common(sc->sc_ah), ATH_DBG_DFS,
+		"pulse_bw_info=0x%x, pri,ext len/rssi=(%u/%u, %u/%u)\n",
+		are->pulse_bw_info,
+		are->pulse_length_pri, are->rssi,
+		are->pulse_length_ext, are->ext_rssi);
+
+	/*
+	 * Only the last 2 bits of the BW info are relevant, they indicate
+	 * which channel the radar was detected in.
+	 */
+	are->pulse_bw_info &= 0x03;
+
+	switch (are->pulse_bw_info) {
+	case PRI_CH_RADAR_FOUND:
+		/* radar in ctrl channel */
+		dur = are->pulse_length_pri;
+		DFS_STAT_INC(sc, pri_phy_errors);
+		/*
+		 * cannot use ctrl channel RSSI
+		 * if extension channel is stronger
+		 */
+		rssi = (are->ext_rssi >= (are->rssi + 3)) ? 0 : are->rssi;
+		break;
+	case EXT_CH_RADAR_FOUND:
+		/* radar in extension channel */
+		dur = are->pulse_length_ext;
+		DFS_STAT_INC(sc, ext_phy_errors);
+		/*
+		 * cannot use extension channel RSSI
+		 * if control channel is stronger
+		 */
+		rssi = (are->rssi >= (are->ext_rssi + 12)) ? 0 : are->ext_rssi;
+		break;
+	case (PRI_CH_RADAR_FOUND | EXT_CH_RADAR_FOUND):
+		/*
+		 * Conducted testing, when pulse is on DC, both pri and ext
+		 * durations are reported to be same
+		 *
+		 * Radiated testing, when pulse is on DC, different pri and
+		 * ext durations are reported, so take the larger of the two
+		 */
+		if (are->pulse_length_ext >= are->pulse_length_pri)
+			dur = are->pulse_length_ext;
+		else
+			dur = are->pulse_length_pri;
+		DFS_STAT_INC(sc, dc_phy_errors);
+
+		/* when both are present use stronger one */
+		rssi = (are->rssi < are->ext_rssi) ? are->ext_rssi : are->rssi;
+		break;
+	default:
+		/*
+		 * Bogus bandwidth info was received in descriptor,
+		 * so ignore this PHY error
+		 */
+		DFS_STAT_INC(sc, bwinfo_discards);
+		return false;
+	}
+
+	if (rssi == 0) {
+		DFS_STAT_INC(sc, rssi_discards);
+		return false;
+	}
+
+	/*
+	 * TODO: check chirping pulses
+	 *	 checks for chirping are dependent on the DFS regulatory domain
+	 *	 used, which is yet TBD
+	 */
+
+	/* convert duration to usecs */
+	drp->width = dur_to_usecs(sc->sc_ah, dur);
+	drp->rssi = rssi;
+
+	DFS_STAT_INC(sc, pulses_detected);
+	return true;
+}
+#undef PRI_CH_RADAR_FOUND
+#undef EXT_CH_RADAR_FOUND
+
+/*
+ * DFS: check PHY-error for radar pulse and feed the detector
+ */
+void ath9k_dfs_process_phyerr(struct ath_softc *sc, void *data,
+			      struct ath_rx_status *rs, u64 mactime)
+{
+	struct ath_radar_data ard;
+	u16 datalen;
+	char *vdata_end;
+	struct dfs_radar_pulse drp;
+	struct ath_hw *ah = sc->sc_ah;
+	struct ath_common *common = ath9k_hw_common(ah);
+
+	if ((!(rs->rs_phyerr != ATH9K_PHYERR_RADAR)) &&
+	    (!(rs->rs_phyerr != ATH9K_PHYERR_FALSE_RADAR_EXT))) {
+		ath_dbg(common, ATH_DBG_DFS,
+			"Error: rs_phyer=0x%x not a radar error\n",
+			rs->rs_phyerr);
+		return;
+	}
+
+	datalen = rs->rs_datalen;
+	if (datalen == 0) {
+		DFS_STAT_INC(sc, datalen_discards);
+		return;
+	}
+
+	ard.rssi = rs->rs_rssi_ctl0;
+	ard.ext_rssi = rs->rs_rssi_ext0;
+
+	/*
+	 * hardware stores this as 8 bit signed value.
+	 * we will cap it at 0 if it is a negative number
+	 */
+	if (ard.rssi & 0x80)
+		ard.rssi = 0;
+	if (ard.ext_rssi & 0x80)
+		ard.ext_rssi = 0;
+
+	vdata_end = (char *)data + datalen;
+	ard.pulse_bw_info = vdata_end[-1];
+	ard.pulse_length_ext = vdata_end[-2];
+	ard.pulse_length_pri = vdata_end[-3];
+
+	ath_dbg(common, ATH_DBG_DFS,
+		"bw_info=%d, length_pri=%d, length_ext=%d, "
+		"rssi_pri=%d, rssi_ext=%d\n",
+		ard.pulse_bw_info, ard.pulse_length_pri, ard.pulse_length_ext,
+		ard.rssi, ard.ext_rssi);
+
+	drp.freq = ah->curchan->channel;
+	drp.ts = mactime;
+	if (ath9k_postprocess_radar_event(sc, &ard, &drp)) {
+		static u64 last_ts;
+		ath_dbg(common, ATH_DBG_DFS,
+			"ath9k_dfs_process_phyerr: channel=%d, ts=%llu, "
+			"width=%d, rssi=%d, delta_ts=%llu\n",
+			drp.freq, drp.ts, drp.width, drp.rssi, drp.ts-last_ts);
+		last_ts = drp.ts;
+		/*
+		 * TODO: forward pulse to pattern detector
+		 *
+		 * ieee80211_add_radar_pulse(drp.freq, drp.ts,
+		 *                           drp.width, drp.rssi);
+		 */
+	}
+}
diff --git a/drivers/net/wireless/ath/ath9k/dfs.h b/drivers/net/wireless/ath/ath9k/dfs.h
new file mode 100644
index 0000000..c241285
--- /dev/null
+++ b/drivers/net/wireless/ath/ath9k/dfs.h
@@ -0,0 +1,43 @@
+/*
+ * Copyright (c) 2008-2011 Atheros Communications Inc.
+ * Copyright (c) 2011 Neratec Solutions AG
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#ifndef ATH9K_DFS_H
+#define ATH9K_DFS_H
+
+#if defined(CONFIG_ATH9K_DFS_CERTIFIED)
+/**
+ * ath9k_dfs_process_phyerr - process radar PHY error
+ * @sc: ath_softc
+ * @data: RX payload data
+ * @rs: RX status after processing descriptor
+ * @mactime: receive time
+ *
+ * This function is called whenever the HW DFS module detects a radar
+ * pulse and reports it as a PHY error.
+ *
+ * The radar information provided as raw payload data is validated and
+ * filtered for false pulses. Events passing all tests are forwarded to
+ * the upper layer for pattern detection.
+ */
+void ath9k_dfs_process_phyerr(struct ath_softc *sc, void *data,
+			      struct ath_rx_status *rs, u64 mactime);
+#else
+static inline void ath9k_dfs_process_phyerr(struct ath_softc *sc, void *data,
+					    struct ath_rx_status *rs, u64 mactime) { }
+#endif
+
+#endif /* ATH9K_DFS_H */
diff --git a/drivers/net/wireless/ath/ath9k/dfs_debug.c b/drivers/net/wireless/ath/ath9k/dfs_debug.c
new file mode 100644
index 0000000..106d031
--- /dev/null
+++ b/drivers/net/wireless/ath/ath9k/dfs_debug.c
@@ -0,0 +1,81 @@
+/*
+ * Copyright (c) 2008-2011 Atheros Communications Inc.
+ * Copyright (c) 2011 Neratec Solutions AG
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <linux/debugfs.h>
+#include <linux/export.h>
+
+#include "ath9k.h"
+#include "dfs_debug.h"
+
+#define ATH9K_DFS_STAT(s, p) \
+	len += snprintf(buf + len, size - len, "%28s : %10u\n", s, \
+			sc->debug.stats.dfs_stats.p);
+
+static ssize_t read_file_dfs(struct file *file, char __user *user_buf,
+			     size_t count, loff_t *ppos)
+{
+	struct ath_softc *sc = file->private_data;
+	struct ath9k_hw_version *hw_ver = &sc->sc_ah->hw_version;
+	char *buf;
+	unsigned int len = 0, size = 8000;
+	ssize_t retval = 0;
+
+	buf = kzalloc(size, GFP_KERNEL);
+	if (buf == NULL)
+		return -ENOMEM;
+
+	len += snprintf(buf + len, size - len, "DFS support for "
+			"macVersion = 0x%x, macRev = 0x%x: %s\n",
+			hw_ver->macVersion, hw_ver->macRev,
+			(sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_DFS) ?
+					"enabled" : "disabled");
+	ATH9K_DFS_STAT("DFS pulses detected     ", pulses_detected);
+	ATH9K_DFS_STAT("Datalen discards        ", datalen_discards);
+	ATH9K_DFS_STAT("RSSI discards           ", rssi_discards);
+	ATH9K_DFS_STAT("BW info discards        ", bwinfo_discards);
+	ATH9K_DFS_STAT("Primary channel pulses  ", pri_phy_errors);
+	ATH9K_DFS_STAT("Secondary channel pulses", ext_phy_errors);
+	ATH9K_DFS_STAT("Dual channel pulses     ", dc_phy_errors);
+
+	if (len > size)
+		len = size;
+
+	retval = simple_read_from_buffer(user_buf, count, ppos, buf, len);
+	kfree(buf);
+
+	return retval;
+}
+
+static int ath9k_dfs_debugfs_open(struct inode *inode, struct file *file)
+{
+	file->private_data = inode->i_private;
+
+	return 0;
+}
+
+static const struct file_operations fops_dfs_stats = {
+	.read = read_file_dfs,
+	.open = ath9k_dfs_debugfs_open,
+	.owner = THIS_MODULE,
+	.llseek = default_llseek,
+};
+
+void ath9k_dfs_init_debug(struct ath_softc *sc)
+{
+	debugfs_create_file("dfs_stats", S_IRUSR,
+			    sc->debug.debugfs_phy, sc, &fops_dfs_stats);
+}
diff --git a/drivers/net/wireless/ath/ath9k/dfs_debug.h b/drivers/net/wireless/ath/ath9k/dfs_debug.h
new file mode 100644
index 0000000..6e1e2a7
--- /dev/null
+++ b/drivers/net/wireless/ath/ath9k/dfs_debug.h
@@ -0,0 +1,57 @@
+/*
+ * Copyright (c) 2008-2011 Atheros Communications Inc.
+ * Copyright (c) 2011 Neratec Solutions AG
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+
+#ifndef DFS_DEBUG_H
+#define DFS_DEBUG_H
+
+#include "hw.h"
+
+/**
+ * struct ath_dfs_stats - DFS Statistics
+ *
+ * @pulses_detected:  No. of pulses detected so far
+ * @datalen_discards: No. of pulses discarded due to invalid datalen
+ * @rssi_discards:    No. of pulses discarded due to invalid RSSI
+ * @bwinfo_discards:  No. of pulses discarded due to invalid BW info
+ * @pri_phy_errors:   No. of pulses reported for primary channel
+ * @ext_phy_errors:   No. of pulses reported for extension channel
+ * @dc_phy_errors:    No. of pulses reported for primary + extension channel
+ */
+struct ath_dfs_stats {
+	u32 pulses_detected;
+	u32 datalen_discards;
+	u32 rssi_discards;
+	u32 bwinfo_discards;
+	u32 pri_phy_errors;
+	u32 ext_phy_errors;
+	u32 dc_phy_errors;
+};
+
+#if defined(CONFIG_ATH9K_DFS_DEBUGFS)
+
+#define DFS_STAT_INC(sc, c) (sc->debug.stats.dfs_stats.c++)
+void ath9k_dfs_init_debug(struct ath_softc *sc);
+
+#else
+
+#define DFS_STAT_INC(sc, c) do { } while (0)
+static inline void ath9k_dfs_init_debug(struct ath_softc *sc) { }
+
+#endif /* CONFIG_ATH9K_DFS_DEBUGFS */
+
+#endif /* DFS_DEBUG_H */
diff --git a/drivers/net/wireless/ath/ath9k/hw-ops.h b/drivers/net/wireless/ath/ath9k/hw-ops.h
index e74c233..c4ad0b0 100644
--- a/drivers/net/wireless/ath/ath9k/hw-ops.h
+++ b/drivers/net/wireless/ath/ath9k/hw-ops.h
@@ -212,4 +212,13 @@ static inline int ath9k_hw_fast_chan_change(struct ath_hw *ah,
 	return ath9k_hw_private_ops(ah)->fast_chan_change(ah, chan,
 							  ini_reloaded);
 }
+
+static inline void ath9k_hw_set_radar_params(struct ath_hw *ah)
+{
+	if (!ath9k_hw_private_ops(ah)->set_radar_params)
+		return;
+
+	ath9k_hw_private_ops(ah)->set_radar_params(ah, &ah->radar_conf);
+}
+
 #endif /* ATH9K_HW_OPS_H */
diff --git a/drivers/net/wireless/ath/ath9k/hw.c b/drivers/net/wireless/ath/ath9k/hw.c
index 7f8fc65..8cda9a1 100644
--- a/drivers/net/wireless/ath/ath9k/hw.c
+++ b/drivers/net/wireless/ath/ath9k/hw.c
@@ -2277,6 +2277,30 @@ static u8 fixup_chainmask(u8 chip_chainmask, u8 eeprom_chainmask)
 		return chip_chainmask;
 }
 
+/**
+ * ath9k_hw_dfs_tested - checks if DFS has been tested with used chipset
+ * @ah: the atheros hardware data structure
+ *
+ * We enable DFS support upstream on chipsets which have passed a series
+ * of tests. The testing requirements are going to be documented. Desired
+ * test requirements are documented at:
+ *
+ * http://wireless.kernel.org/en/users/Drivers/ath9k/dfs
+ *
+ * Once a new chipset gets properly tested an individual commit can be used
+ * to document the testing for DFS for that chipset.
+ */
+static bool ath9k_hw_dfs_tested(struct ath_hw *ah)
+{
+
+	switch (ah->hw_version.macVersion) {
+	/* AR9580 will likely be our first target to get testing on */
+	case AR_SREV_VERSION_9580:
+	default:
+		return false;
+	}
+}
+
 int ath9k_hw_fill_cap_info(struct ath_hw *ah)
 {
 	struct ath9k_hw_capabilities *pCap = &ah->caps;
@@ -2375,12 +2399,10 @@ int ath9k_hw_fill_cap_info(struct ath_hw *ah)
 	else
 		pCap->num_gpio_pins = AR_NUM_GPIO;
 
-	if (AR_SREV_9160_10_OR_LATER(ah) || AR_SREV_9100(ah)) {
-		pCap->hw_caps |= ATH9K_HW_CAP_CST;
+	if (AR_SREV_9160_10_OR_LATER(ah) || AR_SREV_9100(ah))
 		pCap->rts_aggr_limit = ATH_AMPDU_LIMIT_MAX;
-	} else {
+	else
 		pCap->rts_aggr_limit = (8 * 1024);
-	}
 
 #if defined(CONFIG_RFKILL) || defined(CONFIG_RFKILL_MODULE)
 	ah->rfsilent = ah->eep_ops->get_eeprom(ah, EEP_RF_SILENT);
@@ -2490,6 +2512,9 @@ int ath9k_hw_fill_cap_info(struct ath_hw *ah)
 		pCap->pcie_lcr_offset = 0x80;
 	}
 
+	if (ath9k_hw_dfs_tested(ah))
+		pCap->hw_caps |= ATH9K_HW_CAP_DFS;
+
 	tx_chainmask = pCap->tx_chainmask;
 	rx_chainmask = pCap->rx_chainmask;
 	while (tx_chainmask || rx_chainmask) {
diff --git a/drivers/net/wireless/ath/ath9k/hw.h b/drivers/net/wireless/ath/ath9k/hw.h
index 36968c0..615cc83 100644
--- a/drivers/net/wireless/ath/ath9k/hw.h
+++ b/drivers/net/wireless/ath/ath9k/hw.h
@@ -196,21 +196,21 @@ enum ath_ini_subsys {
 enum ath9k_hw_caps {
 	ATH9K_HW_CAP_HT                         = BIT(0),
 	ATH9K_HW_CAP_RFSILENT                   = BIT(1),
-	ATH9K_HW_CAP_CST                        = BIT(2),
-	ATH9K_HW_CAP_AUTOSLEEP                  = BIT(4),
-	ATH9K_HW_CAP_4KB_SPLITTRANS             = BIT(5),
-	ATH9K_HW_CAP_EDMA			= BIT(6),
-	ATH9K_HW_CAP_RAC_SUPPORTED		= BIT(7),
-	ATH9K_HW_CAP_LDPC			= BIT(8),
-	ATH9K_HW_CAP_FASTCLOCK			= BIT(9),
-	ATH9K_HW_CAP_SGI_20			= BIT(10),
-	ATH9K_HW_CAP_PAPRD			= BIT(11),
-	ATH9K_HW_CAP_ANT_DIV_COMB		= BIT(12),
-	ATH9K_HW_CAP_2GHZ			= BIT(13),
-	ATH9K_HW_CAP_5GHZ			= BIT(14),
-	ATH9K_HW_CAP_APM			= BIT(15),
-	ATH9K_HW_CAP_RTT			= BIT(16),
-	ATH9K_HW_CAP_MCI			= BIT(17),
+	ATH9K_HW_CAP_AUTOSLEEP                  = BIT(2),
+	ATH9K_HW_CAP_4KB_SPLITTRANS             = BIT(3),
+	ATH9K_HW_CAP_EDMA			= BIT(4),
+	ATH9K_HW_CAP_RAC_SUPPORTED		= BIT(5),
+	ATH9K_HW_CAP_LDPC			= BIT(6),
+	ATH9K_HW_CAP_FASTCLOCK			= BIT(7),
+	ATH9K_HW_CAP_SGI_20			= BIT(8),
+	ATH9K_HW_CAP_PAPRD			= BIT(9),
+	ATH9K_HW_CAP_ANT_DIV_COMB		= BIT(10),
+	ATH9K_HW_CAP_2GHZ			= BIT(11),
+	ATH9K_HW_CAP_5GHZ			= BIT(12),
+	ATH9K_HW_CAP_APM			= BIT(13),
+	ATH9K_HW_CAP_RTT			= BIT(14),
+	ATH9K_HW_CAP_MCI			= BIT(15),
+	ATH9K_HW_CAP_DFS			= BIT(16),
 };
 
 struct ath9k_hw_capabilities {
diff --git a/drivers/net/wireless/ath/ath9k/init.c b/drivers/net/wireless/ath/ath9k/init.c
index 41b72fa..c5df981 100644
--- a/drivers/net/wireless/ath/ath9k/init.c
+++ b/drivers/net/wireless/ath/ath9k/init.c
@@ -297,9 +297,22 @@ static int ath9k_reg_notifier(struct wiphy *wiphy,
 {
 	struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
 	struct ath_softc *sc = hw->priv;
-	struct ath_regulatory *reg = ath9k_hw_regulatory(sc->sc_ah);
+	struct ath_hw *ah = sc->sc_ah;
+	struct ath_regulatory *reg = ath9k_hw_regulatory(ah);
+	int ret;
+
+	ret = ath_reg_notifier_apply(wiphy, request, reg);
+
+	/* Set tx power */
+	if (ah->curchan) {
+		sc->config.txpowlimit = 2 * ah->curchan->chan->max_power;
+		ath9k_ps_wakeup(sc);
+		ath9k_hw_set_txpowerlimit(ah, sc->config.txpowlimit, false);
+		sc->curtxpow = ath9k_hw_regulatory(ah)->power_limit;
+		ath9k_ps_restore(sc);
+	}
 
-	return ath_reg_notifier_apply(wiphy, request, reg);
+	return ret;
 }
 
 /*
diff --git a/drivers/net/wireless/ath/ath9k/main.c b/drivers/net/wireless/ath/ath9k/main.c
index 7d92004..7fbc4bd 100644
--- a/drivers/net/wireless/ath/ath9k/main.c
+++ b/drivers/net/wireless/ath/ath9k/main.c
@@ -644,9 +644,9 @@ static void ath_node_attach(struct ath_softc *sc, struct ieee80211_sta *sta,
 	spin_lock(&sc->nodes_lock);
 	list_add(&an->list, &sc->nodes);
 	spin_unlock(&sc->nodes_lock);
+#endif
 	an->sta = sta;
 	an->vif = vif;
-#endif
 	if (sc->sc_flags & SC_OP_TXAGGR) {
 		ath_tx_node_init(sc, an);
 		an->maxampdu = 1 << (IEEE80211_HT_MAX_AMPDU_FACTOR +
@@ -1873,7 +1873,8 @@ static int ath9k_set_key(struct ieee80211_hw *hw,
 	if (ath9k_modparam_nohwcrypt)
 		return -ENOSPC;
 
-	if (vif->type == NL80211_IFTYPE_ADHOC &&
+	if ((vif->type == NL80211_IFTYPE_ADHOC ||
+	     vif->type == NL80211_IFTYPE_MESH_POINT) &&
 	    (key->cipher == WLAN_CIPHER_SUITE_TKIP ||
 	     key->cipher == WLAN_CIPHER_SUITE_CCMP) &&
 	    !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
diff --git a/drivers/net/wireless/ath/ath9k/mci.c b/drivers/net/wireless/ath/ath9k/mci.c
index d678040..691bf47 100644
--- a/drivers/net/wireless/ath/ath9k/mci.c
+++ b/drivers/net/wireless/ath/ath9k/mci.c
@@ -234,8 +234,8 @@ static void ath_mci_cal_msg(struct ath_softc *sc, u8 opcode, u8 *rx_payload)
 	}
 }
 
-void ath_mci_process_profile(struct ath_softc *sc,
-			     struct ath_mci_profile_info *info)
+static void ath_mci_process_profile(struct ath_softc *sc,
+				    struct ath_mci_profile_info *info)
 {
 	struct ath_common *common = ath9k_hw_common(sc->sc_ah);
 	struct ath_btcoex *btcoex = &sc->btcoex;
@@ -261,8 +261,8 @@ void ath_mci_process_profile(struct ath_softc *sc,
 	ath_mci_update_scheme(sc);
 }
 
-void ath_mci_process_status(struct ath_softc *sc,
-			    struct ath_mci_profile_status *status)
+static void ath_mci_process_status(struct ath_softc *sc,
+				   struct ath_mci_profile_status *status)
 {
 	struct ath_common *common = ath9k_hw_common(sc->sc_ah);
 	struct ath_btcoex *btcoex = &sc->btcoex;
diff --git a/drivers/net/wireless/ath/ath9k/mci.h b/drivers/net/wireless/ath/ath9k/mci.h
index b71bded..29e3e51 100644
--- a/drivers/net/wireless/ath/ath9k/mci.h
+++ b/drivers/net/wireless/ath/ath9k/mci.h
@@ -128,10 +128,6 @@ struct ath_mci_coex {
 };
 
 void ath_mci_flush_profile(struct ath_mci_profile *mci);
-void ath_mci_process_profile(struct ath_softc *sc,
-			     struct ath_mci_profile_info *info);
-void ath_mci_process_status(struct ath_softc *sc,
-			    struct ath_mci_profile_status *status);
 int ath_mci_setup(struct ath_softc *sc);
 void ath_mci_cleanup(struct ath_softc *sc);
 void ath_mci_intr(struct ath_softc *sc);
diff --git a/drivers/net/wireless/ath/ath9k/rc.c b/drivers/net/wireless/ath/ath9k/rc.c
index 888abc2..528d5f3 100644
--- a/drivers/net/wireless/ath/ath9k/rc.c
+++ b/drivers/net/wireless/ath/ath9k/rc.c
@@ -1271,7 +1271,9 @@ static void ath_rc_init(struct ath_softc *sc,
 
 	ath_rc_priv->max_valid_rate = k;
 	ath_rc_sort_validrates(rate_table, ath_rc_priv);
-	ath_rc_priv->rate_max_phy = ath_rc_priv->valid_rate_index[k-4];
+	ath_rc_priv->rate_max_phy = (k > 4) ?
+					ath_rc_priv->valid_rate_index[k-4] :
+					ath_rc_priv->valid_rate_index[k-1];
 	ath_rc_priv->rate_table = rate_table;
 
 	ath_dbg(common, ATH_DBG_CONFIG,
diff --git a/drivers/net/wireless/ath/ath9k/recv.c b/drivers/net/wireless/ath/ath9k/recv.c
index e031841..ad5176d 100644
--- a/drivers/net/wireless/ath/ath9k/recv.c
+++ b/drivers/net/wireless/ath/ath9k/recv.c
@@ -1823,6 +1823,7 @@ int ath_rx_tasklet(struct ath_softc *sc, int flush, bool hp)
 		hdr = (struct ieee80211_hdr *) (hdr_skb->data + rx_status_len);
 		rxs = IEEE80211_SKB_RXCB(hdr_skb);
 		if (ieee80211_is_beacon(hdr->frame_control) &&
+		    !is_zero_ether_addr(common->curbssid) &&
 		    !compare_ether_addr(hdr->addr3, common->curbssid))
 			rs.is_mybeacon = true;
 		else
diff --git a/drivers/net/wireless/ath/ath9k/xmit.c b/drivers/net/wireless/ath/ath9k/xmit.c
index 9e65c31..23e80e6 100644
--- a/drivers/net/wireless/ath/ath9k/xmit.c
+++ b/drivers/net/wireless/ath/ath9k/xmit.c
@@ -53,7 +53,7 @@ static void ath_tx_complete(struct ath_softc *sc, struct sk_buff *skb,
 			    int tx_flags, struct ath_txq *txq);
 static void ath_tx_complete_buf(struct ath_softc *sc, struct ath_buf *bf,
 				struct ath_txq *txq, struct list_head *bf_q,
-				struct ath_tx_status *ts, int txok, int sendbar);
+				struct ath_tx_status *ts, int txok);
 static void ath_tx_txqaddbuf(struct ath_softc *sc, struct ath_txq *txq,
 			     struct list_head *head, bool internal);
 static void ath_tx_rc_status(struct ath_softc *sc, struct ath_buf *bf,
@@ -150,6 +150,12 @@ static struct ath_frame_info *get_frame_info(struct sk_buff *skb)
 	return (struct ath_frame_info *) &tx_info->rate_driver_data[0];
 }
 
+static void ath_send_bar(struct ath_atx_tid *tid, u16 seqno)
+{
+	ieee80211_send_bar(tid->an->vif, tid->an->sta->addr, tid->tidno,
+			   seqno << IEEE80211_SEQ_SEQ_SHIFT);
+}
+
 static void ath_tx_flush_tid(struct ath_softc *sc, struct ath_atx_tid *tid)
 {
 	struct ath_txq *txq = tid->ac->txq;
@@ -158,25 +164,24 @@ static void ath_tx_flush_tid(struct ath_softc *sc, struct ath_atx_tid *tid)
 	struct list_head bf_head;
 	struct ath_tx_status ts;
 	struct ath_frame_info *fi;
+	bool sendbar = false;
 
 	INIT_LIST_HEAD(&bf_head);
 
 	memset(&ts, 0, sizeof(ts));
-	spin_lock_bh(&txq->axq_lock);
 
 	while ((skb = __skb_dequeue(&tid->buf_q))) {
 		fi = get_frame_info(skb);
 		bf = fi->bf;
 
-		spin_unlock_bh(&txq->axq_lock);
 		if (bf && fi->retries) {
 			list_add_tail(&bf->list, &bf_head);
 			ath_tx_update_baw(sc, tid, bf->bf_state.seqno);
-			ath_tx_complete_buf(sc, bf, txq, &bf_head, &ts, 0, 1);
+			ath_tx_complete_buf(sc, bf, txq, &bf_head, &ts, 0);
+			sendbar = true;
 		} else {
 			ath_tx_send_normal(sc, txq, NULL, skb);
 		}
-		spin_lock_bh(&txq->axq_lock);
 	}
 
 	if (tid->baw_head == tid->baw_tail) {
@@ -184,7 +189,8 @@ static void ath_tx_flush_tid(struct ath_softc *sc, struct ath_atx_tid *tid)
 		tid->state &= ~AGGR_CLEANUP;
 	}
 
-	spin_unlock_bh(&txq->axq_lock);
+	if (sendbar)
+		ath_send_bar(tid, tid->seq_start);
 }
 
 static void ath_tx_update_baw(struct ath_softc *sc, struct ath_atx_tid *tid,
@@ -200,6 +206,8 @@ static void ath_tx_update_baw(struct ath_softc *sc, struct ath_atx_tid *tid,
 	while (tid->baw_head != tid->baw_tail && !test_bit(tid->baw_head, tid->tx_buf)) {
 		INCR(tid->seq_start, IEEE80211_SEQ_MAX);
 		INCR(tid->baw_head, ATH_TID_MAX_BUFS);
+		if (tid->bar_index >= 0)
+			tid->bar_index--;
 	}
 }
 
@@ -243,9 +251,7 @@ static void ath_tid_drain(struct ath_softc *sc, struct ath_txq *txq,
 		bf = fi->bf;
 
 		if (!bf) {
-			spin_unlock(&txq->axq_lock);
 			ath_tx_complete(sc, skb, ATH_TX_ERROR, txq);
-			spin_lock(&txq->axq_lock);
 			continue;
 		}
 
@@ -254,24 +260,26 @@ static void ath_tid_drain(struct ath_softc *sc, struct ath_txq *txq,
 		if (fi->retries)
 			ath_tx_update_baw(sc, tid, bf->bf_state.seqno);
 
-		spin_unlock(&txq->axq_lock);
-		ath_tx_complete_buf(sc, bf, txq, &bf_head, &ts, 0, 0);
-		spin_lock(&txq->axq_lock);
+		ath_tx_complete_buf(sc, bf, txq, &bf_head, &ts, 0);
 	}
 
 	tid->seq_next = tid->seq_start;
 	tid->baw_tail = tid->baw_head;
+	tid->bar_index = -1;
 }
 
 static void ath_tx_set_retry(struct ath_softc *sc, struct ath_txq *txq,
-			     struct sk_buff *skb)
+			     struct sk_buff *skb, int count)
 {
 	struct ath_frame_info *fi = get_frame_info(skb);
 	struct ath_buf *bf = fi->bf;
 	struct ieee80211_hdr *hdr;
+	int prev = fi->retries;
 
 	TX_STAT_INC(txq->axq_qnum, a_retries);
-	if (fi->retries++ > 0)
+	fi->retries += count;
+
+	if (prev > 0)
 		return;
 
 	hdr = (struct ieee80211_hdr *)skb->data;
@@ -370,7 +378,7 @@ static void ath_tx_complete_aggr(struct ath_softc *sc, struct ath_txq *txq,
 	struct ath_buf *bf_next, *bf_last = bf->bf_lastbf;
 	struct list_head bf_head;
 	struct sk_buff_head bf_pending;
-	u16 seq_st = 0, acked_cnt = 0, txfail_cnt = 0;
+	u16 seq_st = 0, acked_cnt = 0, txfail_cnt = 0, seq_first;
 	u32 ba[WME_BA_BMP_SIZE >> 5];
 	int isaggr, txfail, txpending, sendbar = 0, needreset = 0, nbad = 0;
 	bool rc_update = true;
@@ -379,6 +387,8 @@ static void ath_tx_complete_aggr(struct ath_softc *sc, struct ath_txq *txq,
 	int nframes;
 	u8 tidno;
 	bool flush = !!(ts->ts_status & ATH9K_TX_FLUSH);
+	int i, retries;
+	int bar_index = -1;
 
 	skb = bf->bf_mpdu;
 	hdr = (struct ieee80211_hdr *)skb->data;
@@ -387,6 +397,10 @@ static void ath_tx_complete_aggr(struct ath_softc *sc, struct ath_txq *txq,
 
 	memcpy(rates, tx_info->control.rates, sizeof(rates));
 
+	retries = ts->ts_longretry + 1;
+	for (i = 0; i < ts->ts_rateindex; i++)
+		retries += rates[i].count;
+
 	rcu_read_lock();
 
 	sta = ieee80211_find_sta_by_ifaddr(hw, hdr->addr1, hdr->addr2);
@@ -400,8 +414,7 @@ static void ath_tx_complete_aggr(struct ath_softc *sc, struct ath_txq *txq,
 			if (!bf->bf_stale || bf_next != NULL)
 				list_move_tail(&bf->list, &bf_head);
 
-			ath_tx_complete_buf(sc, bf, txq, &bf_head, ts,
-				0, 0);
+			ath_tx_complete_buf(sc, bf, txq, &bf_head, ts, 0);
 
 			bf = bf_next;
 		}
@@ -411,6 +424,7 @@ static void ath_tx_complete_aggr(struct ath_softc *sc, struct ath_txq *txq,
 	an = (struct ath_node *)sta->drv_priv;
 	tidno = ieee80211_get_qos_ctl(hdr)[0] & IEEE80211_QOS_CTL_TID_MASK;
 	tid = ATH_AN_2_TID(an, tidno);
+	seq_first = tid->seq_start;
 
 	/*
 	 * The hardware occasionally sends a tx status for the wrong TID.
@@ -460,25 +474,25 @@ static void ath_tx_complete_aggr(struct ath_softc *sc, struct ath_txq *txq,
 		} else if (!isaggr && txok) {
 			/* transmit completion */
 			acked_cnt++;
+		} else if ((tid->state & AGGR_CLEANUP) || !retry) {
+			/*
+			 * cleanup in progress, just fail
+			 * the un-acked sub-frames
+			 */
+			txfail = 1;
+		} else if (flush) {
+			txpending = 1;
+		} else if (fi->retries < ATH_MAX_SW_RETRIES) {
+			if (txok || !an->sleeping)
+				ath_tx_set_retry(sc, txq, bf->bf_mpdu,
+						 retries);
+
+			txpending = 1;
 		} else {
-			if ((tid->state & AGGR_CLEANUP) || !retry) {
-				/*
-				 * cleanup in progress, just fail
-				 * the un-acked sub-frames
-				 */
-				txfail = 1;
-			} else if (flush) {
-				txpending = 1;
-			} else if (fi->retries < ATH_MAX_SW_RETRIES) {
-				if (txok || !an->sleeping)
-					ath_tx_set_retry(sc, txq, bf->bf_mpdu);
-
-				txpending = 1;
-			} else {
-				txfail = 1;
-				sendbar = 1;
-				txfail_cnt++;
-			}
+			txfail = 1;
+			txfail_cnt++;
+			bar_index = max_t(int, bar_index,
+				ATH_BA_INDEX(seq_first, seqno));
 		}
 
 		/*
@@ -495,9 +509,7 @@ static void ath_tx_complete_aggr(struct ath_softc *sc, struct ath_txq *txq,
 			 * complete the acked-ones/xretried ones; update
 			 * block-ack window
 			 */
-			spin_lock_bh(&txq->axq_lock);
 			ath_tx_update_baw(sc, tid, seqno);
-			spin_unlock_bh(&txq->axq_lock);
 
 			if (rc_update && (acked_cnt == 1 || txfail_cnt == 1)) {
 				memcpy(tx_info->control.rates, rates, sizeof(rates));
@@ -506,33 +518,30 @@ static void ath_tx_complete_aggr(struct ath_softc *sc, struct ath_txq *txq,
 			}
 
 			ath_tx_complete_buf(sc, bf, txq, &bf_head, ts,
-				!txfail, sendbar);
+				!txfail);
 		} else {
 			/* retry the un-acked ones */
-			if (!(sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)) {
-				if (bf->bf_next == NULL && bf_last->bf_stale) {
-					struct ath_buf *tbf;
-
-					tbf = ath_clone_txbuf(sc, bf_last);
-					/*
-					 * Update tx baw and complete the
-					 * frame with failed status if we
-					 * run out of tx buf.
-					 */
-					if (!tbf) {
-						spin_lock_bh(&txq->axq_lock);
-						ath_tx_update_baw(sc, tid, seqno);
-						spin_unlock_bh(&txq->axq_lock);
-
-						ath_tx_complete_buf(sc, bf, txq,
-								    &bf_head,
-								    ts, 0,
-								    !flush);
-						break;
-					}
-
-					fi->bf = tbf;
+			if (!(sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) &&
+			    bf->bf_next == NULL && bf_last->bf_stale) {
+				struct ath_buf *tbf;
+
+				tbf = ath_clone_txbuf(sc, bf_last);
+				/*
+				 * Update tx baw and complete the
+				 * frame with failed status if we
+				 * run out of tx buf.
+				 */
+				if (!tbf) {
+					ath_tx_update_baw(sc, tid, seqno);
+
+					ath_tx_complete_buf(sc, bf, txq,
+							    &bf_head, ts, 0);
+					bar_index = max_t(int, bar_index,
+						ATH_BA_INDEX(seq_first, seqno));
+					break;
 				}
+
+				fi->bf = tbf;
 			}
 
 			/*
@@ -545,12 +554,18 @@ static void ath_tx_complete_aggr(struct ath_softc *sc, struct ath_txq *txq,
 		bf = bf_next;
 	}
 
+	if (bar_index >= 0) {
+		u16 bar_seq = ATH_BA_INDEX2SEQ(seq_first, bar_index);
+		ath_send_bar(tid, ATH_BA_INDEX2SEQ(seq_first, bar_index + 1));
+		if (BAW_WITHIN(tid->seq_start, tid->baw_size, bar_seq))
+			tid->bar_index = ATH_BA_INDEX(tid->seq_start, bar_seq);
+	}
+
 	/* prepend un-acked frames to the beginning of the pending frame queue */
 	if (!skb_queue_empty(&bf_pending)) {
 		if (an->sleeping)
 			ieee80211_sta_set_buffered(sta, tid->tidno, true);
 
-		spin_lock_bh(&txq->axq_lock);
 		skb_queue_splice(&bf_pending, &tid->buf_q);
 		if (!an->sleeping) {
 			ath_tx_queue_tid(txq, tid);
@@ -558,7 +573,6 @@ static void ath_tx_complete_aggr(struct ath_softc *sc, struct ath_txq *txq,
 			if (ts->ts_status & ATH9K_TXERR_FILT)
 				tid->ac->clear_ps_filter = true;
 		}
-		spin_unlock_bh(&txq->axq_lock);
 	}
 
 	if (tid->state & AGGR_CLEANUP)
@@ -617,24 +631,26 @@ static u32 ath_lookup_rate(struct ath_softc *sc, struct ath_buf *bf,
 	max_4ms_framelen = ATH_AMPDU_LIMIT_MAX;
 
 	for (i = 0; i < 4; i++) {
-		if (rates[i].count) {
-			int modeidx;
-			if (!(rates[i].flags & IEEE80211_TX_RC_MCS)) {
-				legacy = 1;
-				break;
-			}
-
-			if (rates[i].flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
-				modeidx = MCS_HT40;
-			else
-				modeidx = MCS_HT20;
+		int modeidx;
 
-			if (rates[i].flags & IEEE80211_TX_RC_SHORT_GI)
-				modeidx++;
+		if (!rates[i].count)
+			continue;
 
-			frmlen = ath_max_4ms_framelen[modeidx][rates[i].idx];
-			max_4ms_framelen = min(max_4ms_framelen, frmlen);
+		if (!(rates[i].flags & IEEE80211_TX_RC_MCS)) {
+			legacy = 1;
+			break;
 		}
+
+		if (rates[i].flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
+			modeidx = MCS_HT40;
+		else
+			modeidx = MCS_HT20;
+
+		if (rates[i].flags & IEEE80211_TX_RC_SHORT_GI)
+			modeidx++;
+
+		frmlen = ath_max_4ms_framelen[modeidx][rates[i].idx];
+		max_4ms_framelen = min(max_4ms_framelen, frmlen);
 	}
 
 	/*
@@ -770,8 +786,6 @@ static enum ATH_AGGR_STATUS ath_tx_form_aggr(struct ath_softc *sc,
 
 		bf->bf_state.bf_type = BUF_AMPDU | BUF_AGGR;
 		seqno = bf->bf_state.seqno;
-		if (!bf_first)
-			bf_first = bf;
 
 		/* do not step over block-ack window */
 		if (!BAW_WITHIN(tid->seq_start, tid->baw_size, seqno)) {
@@ -779,6 +793,21 @@ static enum ATH_AGGR_STATUS ath_tx_form_aggr(struct ath_softc *sc,
 			break;
 		}
 
+		if (tid->bar_index > ATH_BA_INDEX(tid->seq_start, seqno)) {
+			struct ath_tx_status ts = {};
+			struct list_head bf_head;
+
+			INIT_LIST_HEAD(&bf_head);
+			list_add(&bf->list, &bf_head);
+			__skb_unlink(skb, &tid->buf_q);
+			ath_tx_update_baw(sc, tid, seqno);
+			ath_tx_complete_buf(sc, bf, txq, &bf_head, &ts, 0);
+			continue;
+		}
+
+		if (!bf_first)
+			bf_first = bf;
+
 		if (!rl) {
 			aggr_limit = ath_lookup_rate(sc, bf, tid);
 			rl = 1;
@@ -1121,6 +1150,7 @@ int ath_tx_aggr_start(struct ath_softc *sc, struct ieee80211_sta *sta,
 	txtid->state |= AGGR_ADDBA_PROGRESS;
 	txtid->paused = true;
 	*ssn = txtid->seq_start = txtid->seq_next;
+	txtid->bar_index = -1;
 
 	memset(txtid->tx_buf, 0, sizeof(txtid->tx_buf));
 	txtid->baw_head = txtid->baw_tail = 0;
@@ -1155,9 +1185,9 @@ void ath_tx_aggr_stop(struct ath_softc *sc, struct ieee80211_sta *sta, u16 tid)
 		txtid->state |= AGGR_CLEANUP;
 	else
 		txtid->state &= ~AGGR_ADDBA_COMPLETE;
-	spin_unlock_bh(&txq->axq_lock);
 
 	ath_tx_flush_tid(sc, txtid);
+	spin_unlock_bh(&txq->axq_lock);
 }
 
 void ath_tx_aggr_sleep(struct ieee80211_sta *sta, struct ath_softc *sc,
@@ -1399,8 +1429,6 @@ static bool bf_is_ampdu_not_probing(struct ath_buf *bf)
 
 static void ath_drain_txq_list(struct ath_softc *sc, struct ath_txq *txq,
 			       struct list_head *list, bool retry_tx)
-	__releases(txq->axq_lock)
-	__acquires(txq->axq_lock)
 {
 	struct ath_buf *bf, *lastbf;
 	struct list_head bf_head;
@@ -1427,13 +1455,11 @@ static void ath_drain_txq_list(struct ath_softc *sc, struct ath_txq *txq,
 		if (bf_is_ampdu_not_probing(bf))
 			txq->axq_ampdu_depth--;
 
-		spin_unlock_bh(&txq->axq_lock);
 		if (bf_isampdu(bf))
 			ath_tx_complete_aggr(sc, txq, bf, &bf_head, &ts, 0,
 					     retry_tx);
 		else
-			ath_tx_complete_buf(sc, bf, txq, &bf_head, &ts, 0, 0);
-		spin_lock_bh(&txq->axq_lock);
+			ath_tx_complete_buf(sc, bf, txq, &bf_head, &ts, 0);
 	}
 }
 
@@ -1560,11 +1586,9 @@ void ath_txq_schedule(struct ath_softc *sc, struct ath_txq *txq)
 				break;
 		}
 
-		if (!list_empty(&ac->tid_q)) {
-			if (!ac->sched) {
-				ac->sched = true;
-				list_add_tail(&ac->list, &txq->axq_acq);
-			}
+		if (!list_empty(&ac->tid_q) && !ac->sched) {
+			ac->sched = true;
+			list_add_tail(&ac->list, &txq->axq_acq);
 		}
 
 		if (ac == last_ac ||
@@ -1707,10 +1731,6 @@ static void ath_tx_send_normal(struct ath_softc *sc, struct ath_txq *txq,
 	list_add_tail(&bf->list, &bf_head);
 	bf->bf_state.bf_type = 0;
 
-	/* update starting sequence number for subsequent ADDBA request */
-	if (tid)
-		INCR(tid->seq_start, IEEE80211_SEQ_MAX);
-
 	bf->bf_lastbf = bf;
 	ath_tx_fill_desc(sc, bf, txq, fi->framelen);
 	ath_tx_txqaddbuf(sc, txq, &bf_head, false);
@@ -1818,7 +1838,6 @@ static void ath_tx_start_dma(struct ath_softc *sc, struct sk_buff *skb,
 	struct ath_buf *bf;
 	u8 tidno;
 
-	spin_lock_bh(&txctl->txq->axq_lock);
 	if ((sc->sc_flags & SC_OP_TXAGGR) && txctl->an &&
 		ieee80211_is_data_qos(hdr->frame_control)) {
 		tidno = ieee80211_get_qos_ctl(hdr)[0] &
@@ -1837,7 +1856,7 @@ static void ath_tx_start_dma(struct ath_softc *sc, struct sk_buff *skb,
 	} else {
 		bf = ath_tx_setup_buffer(sc, txctl->txq, tid, skb);
 		if (!bf)
-			goto out;
+			return;
 
 		bf->bf_state.bfs_paprd = txctl->paprd;
 
@@ -1846,9 +1865,6 @@ static void ath_tx_start_dma(struct ath_softc *sc, struct sk_buff *skb,
 
 		ath_tx_send_normal(sc, txctl->txq, tid, skb);
 	}
-
-out:
-	spin_unlock_bh(&txctl->txq->axq_lock);
 }
 
 /* Upon failure caller should free skb */
@@ -1915,9 +1931,11 @@ int ath_tx_start(struct ieee80211_hw *hw, struct sk_buff *skb,
 		ieee80211_stop_queue(sc->hw, q);
 		txq->stopped = 1;
 	}
-	spin_unlock_bh(&txq->axq_lock);
 
 	ath_tx_start_dma(sc, skb, txctl);
+
+	spin_unlock_bh(&txq->axq_lock);
+
 	return 0;
 }
 
@@ -1936,9 +1954,6 @@ static void ath_tx_complete(struct ath_softc *sc, struct sk_buff *skb,
 
 	ath_dbg(common, ATH_DBG_XMIT, "TX complete: skb: %p\n", skb);
 
-	if (tx_flags & ATH_TX_BAR)
-		tx_info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
-
 	if (!(tx_flags & ATH_TX_ERROR))
 		/* Frame was ACKed */
 		tx_info->flags |= IEEE80211_TX_STAT_ACK;
@@ -1966,7 +1981,6 @@ static void ath_tx_complete(struct ath_softc *sc, struct sk_buff *skb,
 
 	q = skb_get_queue_mapping(skb);
 	if (txq == sc->tx.txq_map[q]) {
-		spin_lock_bh(&txq->axq_lock);
 		if (WARN_ON(--txq->pending_frames < 0))
 			txq->pending_frames = 0;
 
@@ -1974,7 +1988,6 @@ static void ath_tx_complete(struct ath_softc *sc, struct sk_buff *skb,
 			ieee80211_wake_queue(sc->hw, q);
 			txq->stopped = 0;
 		}
-		spin_unlock_bh(&txq->axq_lock);
 	}
 
 	ieee80211_tx_status(hw, skb);
@@ -1982,16 +1995,13 @@ static void ath_tx_complete(struct ath_softc *sc, struct sk_buff *skb,
 
 static void ath_tx_complete_buf(struct ath_softc *sc, struct ath_buf *bf,
 				struct ath_txq *txq, struct list_head *bf_q,
-				struct ath_tx_status *ts, int txok, int sendbar)
+				struct ath_tx_status *ts, int txok)
 {
 	struct sk_buff *skb = bf->bf_mpdu;
 	struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
 	unsigned long flags;
 	int tx_flags = 0;
 
-	if (sendbar)
-		tx_flags = ATH_TX_BAR;
-
 	if (!txok)
 		tx_flags |= ATH_TX_ERROR;
 
@@ -2083,8 +2093,6 @@ static void ath_tx_rc_status(struct ath_softc *sc, struct ath_buf *bf,
 static void ath_tx_process_buffer(struct ath_softc *sc, struct ath_txq *txq,
 				  struct ath_tx_status *ts, struct ath_buf *bf,
 				  struct list_head *bf_head)
-	__releases(txq->axq_lock)
-	__acquires(txq->axq_lock)
 {
 	int txok;
 
@@ -2094,16 +2102,12 @@ static void ath_tx_process_buffer(struct ath_softc *sc, struct ath_txq *txq,
 	if (bf_is_ampdu_not_probing(bf))
 		txq->axq_ampdu_depth--;
 
-	spin_unlock_bh(&txq->axq_lock);
-
 	if (!bf_isampdu(bf)) {
 		ath_tx_rc_status(sc, bf, ts, 1, txok ? 0 : 1, txok);
-		ath_tx_complete_buf(sc, bf, txq, bf_head, ts, txok, 0);
+		ath_tx_complete_buf(sc, bf, txq, bf_head, ts, txok);
 	} else
 		ath_tx_complete_aggr(sc, txq, bf, bf_head, ts, txok, true);
 
-	spin_lock_bh(&txq->axq_lock);
-
 	if (sc->sc_flags & SC_OP_TXAGGR)
 		ath_txq_schedule(sc, txq);
 }
diff --git a/drivers/net/wireless/ath/regd.c b/drivers/net/wireless/ath/regd.c
index 65ecb5b..10dea37 100644
--- a/drivers/net/wireless/ath/regd.c
+++ b/drivers/net/wireless/ath/regd.c
@@ -21,6 +21,8 @@
 #include "regd.h"
 #include "regd_common.h"
 
+static int __ath_regd_init(struct ath_regulatory *reg);
+
 /*
  * This is a set of common rules used by our world regulatory domains.
  * We have 12 world regulatory domains. To save space we consolidate
@@ -347,10 +349,26 @@ static void ath_reg_apply_world_flags(struct wiphy *wiphy,
 	}
 }
 
+static u16 ath_regd_find_country_by_name(char *alpha2)
+{
+	unsigned int i;
+
+	for (i = 0; i < ARRAY_SIZE(allCountries); i++) {
+		if (!memcmp(allCountries[i].isoName, alpha2, 2))
+			return allCountries[i].countryCode;
+	}
+
+	return -1;
+}
+
 int ath_reg_notifier_apply(struct wiphy *wiphy,
 			   struct regulatory_request *request,
 			   struct ath_regulatory *reg)
 {
+	struct ath_common *common = container_of(reg, struct ath_common,
+						 regulatory);
+	u16 country_code;
+
 	/* We always apply this */
 	ath_reg_apply_radar_flags(wiphy);
 
@@ -363,14 +381,37 @@ int ath_reg_notifier_apply(struct wiphy *wiphy,
 		return 0;
 
 	switch (request->initiator) {
-	case NL80211_REGDOM_SET_BY_DRIVER:
 	case NL80211_REGDOM_SET_BY_CORE:
+		/*
+		 * If common->reg_world_copy is world roaming it means we *were*
+		 * world roaming... so we now have to restore that data.
+		 */
+		if (!ath_is_world_regd(&common->reg_world_copy))
+			break;
+
+		memcpy(reg, &common->reg_world_copy,
+		       sizeof(struct ath_regulatory));
+		break;
+	case NL80211_REGDOM_SET_BY_DRIVER:
 	case NL80211_REGDOM_SET_BY_USER:
 		break;
 	case NL80211_REGDOM_SET_BY_COUNTRY_IE:
-		if (ath_is_world_regd(reg))
-			ath_reg_apply_world_flags(wiphy, request->initiator,
-						  reg);
+		if (!ath_is_world_regd(reg))
+			break;
+
+		country_code = ath_regd_find_country_by_name(request->alpha2);
+		if (country_code == (u16) -1)
+			break;
+
+		reg->current_rd = COUNTRY_ERD_FLAG;
+		reg->current_rd |= country_code;
+
+		printk(KERN_DEBUG "ath: regdomain 0x%0x updated by CountryIE\n",
+			reg->current_rd);
+		__ath_regd_init(reg);
+
+		ath_reg_apply_world_flags(wiphy, request->initiator, reg);
+
 		break;
 	}
 
@@ -508,11 +549,7 @@ static void ath_regd_sanitize(struct ath_regulatory *reg)
 	reg->current_rd = 0x64;
 }
 
-int
-ath_regd_init(struct ath_regulatory *reg,
-	      struct wiphy *wiphy,
-	      int (*reg_notifier)(struct wiphy *wiphy,
-				  struct regulatory_request *request))
+static int __ath_regd_init(struct ath_regulatory *reg)
 {
 	struct country_code_to_enum_rd *country = NULL;
 	u16 regdmn;
@@ -583,7 +620,29 @@ ath_regd_init(struct ath_regulatory *reg,
 	printk(KERN_DEBUG "ath: Regpair used: 0x%0x\n",
 		reg->regpair->regDmnEnum);
 
+	return 0;
+}
+
+int
+ath_regd_init(struct ath_regulatory *reg,
+	      struct wiphy *wiphy,
+	      int (*reg_notifier)(struct wiphy *wiphy,
+				  struct regulatory_request *request))
+{
+	struct ath_common *common = container_of(reg, struct ath_common,
+						 regulatory);
+	int r;
+
+	r = __ath_regd_init(reg);
+	if (r)
+		return r;
+
+	if (ath_is_world_regd(reg))
+		memcpy(&common->reg_world_copy, reg,
+		       sizeof(struct ath_regulatory));
+
 	ath_regd_init_wiphy(reg, wiphy, reg_notifier);
+
 	return 0;
 }
 EXPORT_SYMBOL(ath_regd_init);