From 8ec8ebaeceedf3a845f9e23885f26d0d00eefeb7 Mon Sep 17 00:00:00 2001
From: "John W. Linville" <linville@tuxdriver.com>
Date: Mon, 6 Oct 2008 16:16:38 -0400
Subject: ath9k: fixup some merge damage

This hunk was originally removed as part of "ath9k: Fix IRQ nobody cared
issue with ath9k".

Signed-off-by: John W. Linville <linville@tuxdriver.com>
---
 drivers/net/wireless/ath9k/core.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/net/wireless/ath9k/core.c b/drivers/net/wireless/ath9k/core.c
index 6c433a4d003..d7f5257d2ec 100644
--- a/drivers/net/wireless/ath9k/core.c
+++ b/drivers/net/wireless/ath9k/core.c
@@ -288,8 +288,6 @@ static int ath_stop(struct ath_softc *sc)
 	 * hardware is gone (invalid).
 	 */
 
-	if (!(sc->sc_flags & SC_OP_INVALID))
-		ath9k_hw_set_interrupts(ah, 0);
 	ath_draintxq(sc, false);
 	if (!(sc->sc_flags & SC_OP_INVALID)) {
 		ath_stoprecv(sc);
-- 
cgit v1.2.3


From 74af025073461b9ebe82771e48a5b8596c3cf75c Mon Sep 17 00:00:00 2001
From: Linus Torvalds <torvalds@linux-foundation.org>
Date: Fri, 5 Sep 2008 12:38:09 -0700
Subject: wireless: restore revert lost to merge damage

Restore revert "mac80211: Use IWEVASSOCREQIE instead of IWEVCUSTOM",
originally reverted in commit bf7394ccc13fe291d9258f01113b4c61214ddeae.

Signed-off-by: John W. Linville <linville@tuxdriver.com>
---
 net/mac80211/mlme.c | 47 +++++++++++++++++++++++++++++++++++++++--------
 1 file changed, 39 insertions(+), 8 deletions(-)

diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index e859a0ab616..edc339d649c 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -650,20 +650,51 @@ static void ieee80211_sta_send_apinfo(struct ieee80211_sub_if_data *sdata,
 static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data *sdata,
 					 struct ieee80211_if_sta *ifsta)
 {
+	char *buf;
+	size_t len;
+	int i;
 	union iwreq_data wrqu;
 
+	if (!ifsta->assocreq_ies && !ifsta->assocresp_ies)
+		return;
+
+	buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len +
+				ifsta->assocresp_ies_len), GFP_KERNEL);
+	if (!buf)
+		return;
+
+	len = sprintf(buf, "ASSOCINFO(");
 	if (ifsta->assocreq_ies) {
-		memset(&wrqu, 0, sizeof(wrqu));
-		wrqu.data.length = ifsta->assocreq_ies_len;
-		wireless_send_event(sdata->dev, IWEVASSOCREQIE, &wrqu,
-				    ifsta->assocreq_ies);
+		len += sprintf(buf + len, "ReqIEs=");
+		for (i = 0; i < ifsta->assocreq_ies_len; i++) {
+			len += sprintf(buf + len, "%02x",
+				       ifsta->assocreq_ies[i]);
+		}
 	}
 	if (ifsta->assocresp_ies) {
-		memset(&wrqu, 0, sizeof(wrqu));
-		wrqu.data.length = ifsta->assocresp_ies_len;
-		wireless_send_event(sdata->dev, IWEVASSOCRESPIE, &wrqu,
-				    ifsta->assocresp_ies);
+		if (ifsta->assocreq_ies)
+			len += sprintf(buf + len, " ");
+		len += sprintf(buf + len, "RespIEs=");
+		for (i = 0; i < ifsta->assocresp_ies_len; i++) {
+			len += sprintf(buf + len, "%02x",
+				       ifsta->assocresp_ies[i]);
+		}
 	}
+	len += sprintf(buf + len, ")");
+
+	if (len > IW_CUSTOM_MAX) {
+		len = sprintf(buf, "ASSOCRESPIE=");
+		for (i = 0; i < ifsta->assocresp_ies_len; i++) {
+			len += sprintf(buf + len, "%02x",
+				       ifsta->assocresp_ies[i]);
+		}
+	}
+
+	memset(&wrqu, 0, sizeof(wrqu));
+	wrqu.data.length = len;
+	wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
+
+	kfree(buf);
 }
 
 
-- 
cgit v1.2.3


From 8ef9dad3f7c0bdae84cd57f2bc6d4f53421406a8 Mon Sep 17 00:00:00 2001
From: Tomas Winkler <tomas.winkler@intel.com>
Date: Sat, 27 Sep 2008 22:58:18 +0300
Subject: mac80211: remove shadowed variables in ieee80211_master_start_xmit

This patch removes doubly defined variables in ieee80211_master_start_xmit

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---
 net/mac80211/tx.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index 0cc2e23f082..226ce77363d 100644
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -1255,8 +1255,7 @@ static int ieee80211_skb_resize(struct ieee80211_local *local,
 	return 0;
 }
 
-int ieee80211_master_start_xmit(struct sk_buff *skb,
-				struct net_device *dev)
+int ieee80211_master_start_xmit(struct sk_buff *skb, struct net_device *dev)
 {
 	struct ieee80211_master_priv *mpriv = netdev_priv(dev);
 	struct ieee80211_local *local = mpriv->local;
@@ -1308,8 +1307,6 @@ int ieee80211_master_start_xmit(struct sk_buff *skb,
 		}
 	} else if (unlikely(osdata->vif.type == NL80211_IFTYPE_MONITOR)) {
 		struct ieee80211_sub_if_data *sdata;
-		struct ieee80211_local *local = osdata->local;
-		struct ieee80211_hdr *hdr;
 		int hdrlen;
 		u16 len_rthdr;
 
-- 
cgit v1.2.3


From 0345f37be64905846a1ef38378061d4c2730242e Mon Sep 17 00:00:00 2001
From: "Luis R. Rodriguez" <lrodriguez@atheros.com>
Date: Fri, 3 Oct 2008 15:45:25 -0700
Subject: ath9k: kill ath9k's memzero() and use memset() instead

Part of the cleanup on ath9k -- this was also causing some
annoying compile time warnings.

Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---
 drivers/net/wireless/ath9k/beacon.c |  8 ++++----
 drivers/net/wireless/ath9k/core.c   | 14 +++++++-------
 drivers/net/wireless/ath9k/core.h   |  5 +----
 drivers/net/wireless/ath9k/recv.c   |  4 ++--
 drivers/net/wireless/ath9k/xmit.c   | 10 +++++-----
 5 files changed, 19 insertions(+), 22 deletions(-)

diff --git a/drivers/net/wireless/ath9k/beacon.c b/drivers/net/wireless/ath9k/beacon.c
index eedb465d25d..9e15c30bbc0 100644
--- a/drivers/net/wireless/ath9k/beacon.c
+++ b/drivers/net/wireless/ath9k/beacon.c
@@ -129,7 +129,7 @@ static void ath_beacon_setup(struct ath_softc *sc,
 			    ds                    /* first descriptor */
 		);
 
-	memzero(series, sizeof(struct ath9k_11n_rate_series) * 4);
+	memset(series, 0, sizeof(struct ath9k_11n_rate_series) * 4);
 	series[0].Tries = 1;
 	series[0].Rate = rate;
 	series[0].ChSel = sc->sc_tx_chainmask;
@@ -282,7 +282,7 @@ int ath_beaconq_setup(struct ath_hal *ah)
 {
 	struct ath9k_tx_queue_info qi;
 
-	memzero(&qi, sizeof(qi));
+	memset(&qi, 0, sizeof(qi));
 	qi.tqi_aifs = 1;
 	qi.tqi_cwmin = 0;
 	qi.tqi_cwmax = 0;
@@ -662,7 +662,7 @@ void ath_beacon_config(struct ath_softc *sc, int if_id)
 	else
 		av_opmode = sc->sc_ah->ah_opmode;
 
-	memzero(&conf, sizeof(struct ath_beacon_config));
+	memset(&conf, 0, sizeof(struct ath_beacon_config));
 
 	conf.beacon_interval = sc->hw->conf.beacon_int ?
 		sc->hw->conf.beacon_int : ATH_DEFAULT_BINTVAL;
@@ -738,7 +738,7 @@ void ath_beacon_config(struct ath_softc *sc, int if_id)
 			}
 		} while (nexttbtt < tsftu);
 #undef FUDGE
-		memzero(&bs, sizeof(bs));
+		memset(&bs, 0, sizeof(bs));
 		bs.bs_intval = intval;
 		bs.bs_nexttbtt = nexttbtt;
 		bs.bs_dtimperiod = dtimperiod*intval;
diff --git a/drivers/net/wireless/ath9k/core.c b/drivers/net/wireless/ath9k/core.c
index d7f5257d2ec..5af7dfbd423 100644
--- a/drivers/net/wireless/ath9k/core.c
+++ b/drivers/net/wireless/ath9k/core.c
@@ -65,7 +65,7 @@ static void ath_setcurmode(struct ath_softc *sc, enum wireless_mode mode)
 	for (i = 0; i < rt->rateCount; i++)
 		sc->sc_rixmap[rt->info[i].rateCode] = (u8) i;
 
-	memzero(sc->sc_hwmap, sizeof(sc->sc_hwmap));
+	memset(sc->sc_hwmap, 0, sizeof(sc->sc_hwmap));
 	for (i = 0; i < 256; i++) {
 		u8 ix = rt->rateCodeToIndex[i];
 
@@ -417,7 +417,7 @@ static void ath_chainmask_sel_init(struct ath_softc *sc, struct ath_node *an)
 {
 	struct ath_chainmask_sel *cm = &an->an_chainmask_sel;
 
-	memzero(cm, sizeof(struct ath_chainmask_sel));
+	memset(cm, 0, sizeof(struct ath_chainmask_sel));
 
 	cm->cur_tx_mask = sc->sc_tx_chainmask;
 	cm->cur_rx_mask = sc->sc_rx_chainmask;
@@ -526,7 +526,7 @@ int ath_vap_attach(struct ath_softc *sc,
 	if (avp == NULL)
 		return -ENOMEM;
 
-	memzero(avp, sizeof(struct ath_vap));
+	memset(avp, 0, sizeof(struct ath_vap));
 	avp->av_if_data = if_data;
 	/* Set the VAP opmode */
 	avp->av_opmode = opmode;
@@ -1219,7 +1219,7 @@ struct ath_node *ath_node_attach(struct ath_softc *sc, u8 *addr, int if_id)
 	an = kmalloc(sizeof(struct ath_node), GFP_ATOMIC);
 	if (an == NULL)
 		return NULL;
-	memzero(an, sizeof(*an));
+	memset(an, 0, sizeof(*an));
 
 	an->an_sc = sc;
 	memcpy(an->an_addr, addr, ETH_ALEN);
@@ -1606,7 +1606,7 @@ int ath_descdma_setup(struct ath_softc *sc,
 		error = -ENOMEM;
 		goto fail2;
 	}
-	memzero(bf, bsize);
+	memset(bf, 0, bsize);
 	dd->dd_bufptr = bf;
 
 	INIT_LIST_HEAD(head);
@@ -1638,7 +1638,7 @@ fail2:
 	pci_free_consistent(sc->pdev,
 		dd->dd_desc_len, dd->dd_desc, dd->dd_desc_paddr);
 fail:
-	memzero(dd, sizeof(*dd));
+	memset(dd, 0, sizeof(*dd));
 	return error;
 #undef ATH_DESC_4KB_BOUND_CHECK
 #undef ATH_DESC_4KB_BOUND_NUM_SKIPPED
@@ -1663,7 +1663,7 @@ void ath_descdma_cleanup(struct ath_softc *sc,
 
 	INIT_LIST_HEAD(head);
 	kfree(dd->dd_bufptr);
-	memzero(dd, sizeof(*dd));
+	memset(dd, 0, sizeof(*dd));
 }
 
 /*************/
diff --git a/drivers/net/wireless/ath9k/core.h b/drivers/net/wireless/ath9k/core.h
index 872f0c5a0b0..80814c9910c 100644
--- a/drivers/net/wireless/ath9k/core.h
+++ b/drivers/net/wireless/ath9k/core.h
@@ -84,9 +84,6 @@ struct ath_node;
 #define TSF_TO_TU(_h,_l) \
 	((((u32)(_h)) << 22) | (((u32)(_l)) >> 10))
 
-/* XXX: remove */
-#define memzero(_buf, _len) memset(_buf, 0, _len)
-
 #define ATH9K_BH_STATUS_INTACT		0
 #define ATH9K_BH_STATUS_CHANGE		1
 
@@ -184,7 +181,7 @@ void ath_update_chainmask(struct ath_softc *sc, int is_ht);
 		(_bf)->bf_lastbf = NULL;			\
 		(_bf)->bf_lastfrm = NULL;			\
 		(_bf)->bf_next = NULL;				\
-		memzero(&((_bf)->bf_state),			\
+		memset(&((_bf)->bf_state), 0,			\
 			    sizeof(struct ath_buf_state));	\
 	} while (0)
 
diff --git a/drivers/net/wireless/ath9k/recv.c b/drivers/net/wireless/ath9k/recv.c
index 498256309ab..f4be5d11c9d 100644
--- a/drivers/net/wireless/ath9k/recv.c
+++ b/drivers/net/wireless/ath9k/recv.c
@@ -892,7 +892,7 @@ int ath_rx_tasklet(struct ath_softc *sc, int flush)
 
 		hdr = (struct ieee80211_hdr *)skb->data;
 		fc = hdr->frame_control;
-		memzero(&rx_status, sizeof(struct ath_recv_status));
+		memset(&rx_status, 0, sizeof(struct ath_recv_status));
 
 		if (ds->ds_rxstat.rs_more) {
 			/*
@@ -1166,7 +1166,7 @@ int ath_rx_aggr_start(struct ath_softc *sc,
 		} else {
 			/* Ensure the memory is zeroed out (all internal
 			 * pointers are null) */
-			memzero(rxtid->rxbuf, ATH_TID_MAX_BUFS *
+			memset(rxtid->rxbuf, 0, ATH_TID_MAX_BUFS *
 				sizeof(struct ath_rxbuf));
 			DPRINTF(sc, ATH_DBG_AGGR,
 				"%s: Allocated @%p\n", __func__, rxtid->rxbuf);
diff --git a/drivers/net/wireless/ath9k/xmit.c b/drivers/net/wireless/ath9k/xmit.c
index 25929059c7d..bdcb9e1799c 100644
--- a/drivers/net/wireless/ath9k/xmit.c
+++ b/drivers/net/wireless/ath9k/xmit.c
@@ -729,7 +729,7 @@ static void ath_buf_set_rate(struct ath_softc *sc, struct ath_buf *bf)
 	/*
 	 * Setup HAL rate series
 	 */
-	memzero(series, sizeof(struct ath9k_11n_rate_series) * 4);
+	memset(series, 0, sizeof(struct ath9k_11n_rate_series) * 4);
 
 	for (i = 0; i < 4; i++) {
 		if (!bf->bf_rcs[i].tries)
@@ -817,7 +817,7 @@ static void ath_buf_set_rate(struct ath_softc *sc, struct ath_buf *bf)
 		 * Disable multi-rate retry when using RTS/CTS by clearing
 		 * series 1, 2 and 3.
 		 */
-		memzero(&series[1], sizeof(struct ath9k_11n_rate_series) * 3);
+		memset(&series[1], 0, sizeof(struct ath9k_11n_rate_series) * 3);
 	}
 
 	/*
@@ -930,7 +930,7 @@ static void ath_tx_complete_aggr_rifs(struct ath_softc *sc,
 					ATH_DS_BA_BITMAP(ds),
 					WME_BA_BMP_SIZE >> 3);
 			} else {
-				memzero(ba, WME_BA_BMP_SIZE >> 3);
+				memset(ba, 0, WME_BA_BMP_SIZE >> 3);
 
 				/*
 				 * AR5416 can become deaf/mute when BA
@@ -943,7 +943,7 @@ static void ath_tx_complete_aggr_rifs(struct ath_softc *sc,
 					needreset = 1;
 			}
 		} else {
-			memzero(ba, WME_BA_BMP_SIZE >> 3);
+			memset(ba, 0, WME_BA_BMP_SIZE >> 3);
 		}
 	}
 
@@ -2098,7 +2098,7 @@ struct ath_txq *ath_txq_setup(struct ath_softc *sc, int qtype, int subtype)
 	struct ath9k_tx_queue_info qi;
 	int qnum;
 
-	memzero(&qi, sizeof(qi));
+	memset(&qi, 0, sizeof(qi));
 	qi.tqi_subtype = subtype;
 	qi.tqi_aifs = ATH9K_TXQ_USEDEFAULT;
 	qi.tqi_cwmin = ATH9K_TXQ_USEDEFAULT;
-- 
cgit v1.2.3


From a477e4e6d48d3ac7c7a75bad40585cb391e5c237 Mon Sep 17 00:00:00 2001
From: "Luis R. Rodriguez" <lrodriguez@atheros.com>
Date: Fri, 3 Oct 2008 15:45:26 -0700
Subject: ath9k: fix oops on trying to hold the wrong spinlock

We were trying to hold the wrong spinlock due to a typo
on IEEE80211_BAR_CTL_TID_S's definition. We use this to
compute the tid number and then hold this this tid number's
spinlock.

Signed-off-by: Vasanthakumar Thiagarajan <vasanth@atheros.com>
Signed-off-by: Sujith <Sujith.Manoharan@atheros.com>
Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---
 drivers/net/wireless/ath9k/core.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/wireless/ath9k/core.h b/drivers/net/wireless/ath9k/core.h
index 80814c9910c..5b4f1c48a61 100644
--- a/drivers/net/wireless/ath9k/core.h
+++ b/drivers/net/wireless/ath9k/core.h
@@ -309,7 +309,7 @@ void ath_descdma_cleanup(struct ath_softc *sc,
 #define ATH_RX_TIMEOUT           40      /* 40 milliseconds */
 #define WME_NUM_TID              16
 #define IEEE80211_BAR_CTL_TID_M  0xF000  /* tid mask */
-#define IEEE80211_BAR_CTL_TID_S  2       /* tid shift */
+#define IEEE80211_BAR_CTL_TID_S  12      /* tid shift */
 
 enum ATH_RX_TYPE {
 	ATH_RX_NON_CONSUMED = 0,
-- 
cgit v1.2.3


From 6f255425ac3b10c3352c926e7b53e5ea1c364ca4 Mon Sep 17 00:00:00 2001
From: "Luis R. Rodriguez" <lrodriguez@atheros.com>
Date: Fri, 3 Oct 2008 15:45:27 -0700
Subject: ath9k: enable ANI to help with noisy environments

This enables Adaptive Noise Immunity (ANI) on ath9k.
ANI is as algorithm designed to minimize the detrimental
effects of time-varying interferences. This should
help with throughput in noisy environments. To use
ANI we re-enable the MIB interrupt. Since ANI works
on a timer and updates the noise floor we take
advantage of this and also report a non-static noise
floor now to mac80211.

Signed-off-by: Sujith Manoharan <Sujith.Manoharan@atheros.com>
Signed-off-by: Jouni Malinen <Jouni.Malinen@Atheros.com>
Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---
 drivers/net/wireless/ath9k/ath9k.h |   2 +-
 drivers/net/wireless/ath9k/core.c  | 129 +++++++++++++++++++++++++++++++++++--
 drivers/net/wireless/ath9k/core.h  |  25 +++++++
 drivers/net/wireless/ath9k/hw.c    |  35 ++++++++--
 drivers/net/wireless/ath9k/main.c  |  18 +++++-
 drivers/net/wireless/ath9k/recv.c  |  13 +---
 6 files changed, 197 insertions(+), 25 deletions(-)

diff --git a/drivers/net/wireless/ath9k/ath9k.h b/drivers/net/wireless/ath9k/ath9k.h
index 0e897c27685..accace5f7ef 100644
--- a/drivers/net/wireless/ath9k/ath9k.h
+++ b/drivers/net/wireless/ath9k/ath9k.h
@@ -854,7 +854,7 @@ bool ath9k_hw_calibrate(struct ath_hal *ah,
 			u8 rxchainmask,
 			bool longcal,
 			bool *isCalDone);
-int16_t ath9k_hw_getchan_noise(struct ath_hal *ah,
+s16 ath9k_hw_getchan_noise(struct ath_hal *ah,
 			       struct ath9k_channel *chan);
 void ath9k_hw_write_associd(struct ath_hal *ah, const u8 *bssid,
 			    u16 assocId);
diff --git a/drivers/net/wireless/ath9k/core.c b/drivers/net/wireless/ath9k/core.c
index 5af7dfbd423..c5033f6f42a 100644
--- a/drivers/net/wireless/ath9k/core.c
+++ b/drivers/net/wireless/ath9k/core.c
@@ -490,6 +490,122 @@ void ath_update_chainmask(struct ath_softc *sc, int is_ht)
 		__func__, sc->sc_tx_chainmask, sc->sc_rx_chainmask);
 }
 
+/*******/
+/* ANI */
+/*******/
+
+/*
+ *  This routine performs the periodic noise floor calibration function
+ *  that is used to adjust and optimize the chip performance.  This
+ *  takes environmental changes (location, temperature) into account.
+ *  When the task is complete, it reschedules itself depending on the
+ *  appropriate interval that was calculated.
+ */
+
+static void ath_ani_calibrate(unsigned long data)
+{
+	struct ath_softc *sc;
+	struct ath_hal *ah;
+	bool longcal = false;
+	bool shortcal = false;
+	bool aniflag = false;
+	unsigned int timestamp = jiffies_to_msecs(jiffies);
+	u32 cal_interval;
+
+	sc = (struct ath_softc *)data;
+	ah = sc->sc_ah;
+
+	/*
+	* don't calibrate when we're scanning.
+	* we are most likely not on our home channel.
+	*/
+	if (sc->rx_filter & FIF_BCN_PRBRESP_PROMISC)
+		return;
+
+	/* Long calibration runs independently of short calibration. */
+	if ((timestamp - sc->sc_ani.sc_longcal_timer) >= ATH_LONG_CALINTERVAL) {
+		longcal = true;
+		DPRINTF(sc, ATH_DBG_ANI, "%s: longcal @%lu\n",
+			__func__, jiffies);
+		sc->sc_ani.sc_longcal_timer = timestamp;
+	}
+
+	/* Short calibration applies only while sc_caldone is false */
+	if (!sc->sc_ani.sc_caldone) {
+		if ((timestamp - sc->sc_ani.sc_shortcal_timer) >=
+		    ATH_SHORT_CALINTERVAL) {
+			shortcal = true;
+			DPRINTF(sc, ATH_DBG_ANI, "%s: shortcal @%lu\n",
+			       __func__, jiffies);
+			sc->sc_ani.sc_shortcal_timer = timestamp;
+			sc->sc_ani.sc_resetcal_timer = timestamp;
+		}
+	} else {
+		if ((timestamp - sc->sc_ani.sc_resetcal_timer) >=
+		    ATH_RESTART_CALINTERVAL) {
+			ath9k_hw_reset_calvalid(ah, ah->ah_curchan,
+						&sc->sc_ani.sc_caldone);
+			if (sc->sc_ani.sc_caldone)
+				sc->sc_ani.sc_resetcal_timer = timestamp;
+		}
+	}
+
+	/* Verify whether we must check ANI */
+	if ((timestamp - sc->sc_ani.sc_checkani_timer) >=
+	   ATH_ANI_POLLINTERVAL) {
+		aniflag = true;
+		sc->sc_ani.sc_checkani_timer = timestamp;
+	}
+
+	/* Skip all processing if there's nothing to do. */
+	if (longcal || shortcal || aniflag) {
+		/* Call ANI routine if necessary */
+		if (aniflag)
+			ath9k_hw_ani_monitor(ah, &sc->sc_halstats,
+					     ah->ah_curchan);
+
+		/* Perform calibration if necessary */
+		if (longcal || shortcal) {
+			bool iscaldone = false;
+
+			if (ath9k_hw_calibrate(ah, ah->ah_curchan,
+					       sc->sc_rx_chainmask, longcal,
+					       &iscaldone)) {
+				if (longcal)
+					sc->sc_ani.sc_noise_floor =
+						ath9k_hw_getchan_noise(ah,
+							       ah->ah_curchan);
+
+				DPRINTF(sc, ATH_DBG_ANI,
+					"%s: calibrate chan %u/%x nf: %d\n",
+					 __func__,
+					ah->ah_curchan->channel,
+					ah->ah_curchan->channelFlags,
+					sc->sc_ani.sc_noise_floor);
+			} else {
+				DPRINTF(sc, ATH_DBG_ANY,
+					"%s: calibrate chan %u/%x failed\n",
+					 __func__,
+					ah->ah_curchan->channel,
+					ah->ah_curchan->channelFlags);
+			}
+			sc->sc_ani.sc_caldone = iscaldone;
+		}
+	}
+
+	/*
+	* Set timer interval based on previous results.
+	* The interval must be the shortest necessary to satisfy ANI,
+	* short calibration and long calibration.
+	*/
+
+	cal_interval = ATH_ANI_POLLINTERVAL;
+	if (!sc->sc_ani.sc_caldone)
+		cal_interval = min(cal_interval, (u32)ATH_SHORT_CALINTERVAL);
+
+	mod_timer(&sc->sc_ani.timer, jiffies + msecs_to_jiffies(cal_interval));
+}
+
 /******************/
 /* VAP management */
 /******************/
@@ -676,12 +792,6 @@ int ath_open(struct ath_softc *sc, struct ath9k_channel *initial_chan)
 	if (ah->ah_caps.hw_caps & ATH9K_HW_CAP_HT)
 		sc->sc_imask |= ATH9K_INT_CST;
 
-	/* Note: We disable MIB interrupts for now as we don't yet
-	 * handle processing ANI, otherwise you will get an interrupt
-	 * storm after about 7 hours of usage making the system unusable
-	 * with huge latency. Once we do have ANI processing included
-	 * we can re-enable this interrupt. */
-#if 0
 	/*
 	 * Enable MIB interrupts when there are hardware phy counters.
 	 * Note we only do this (at the moment) for station mode.
@@ -690,7 +800,6 @@ int ath_open(struct ath_softc *sc, struct ath9k_channel *initial_chan)
 	    ((sc->sc_ah->ah_opmode == ATH9K_M_STA) ||
 	     (sc->sc_ah->ah_opmode == ATH9K_M_IBSS)))
 		sc->sc_imask |= ATH9K_INT_MIB;
-#endif
 	/*
 	 * Some hardware processes the TIM IE and fires an
 	 * interrupt when the TIM bit is set.  For hardware
@@ -991,6 +1100,10 @@ int ath_init(u16 devid, struct ath_softc *sc)
 	}
 	sc->sc_ah = ah;
 
+	/* Initializes the noise floor to a reasonable default value.
+	 * Later on this will be updated during ANI processing. */
+	sc->sc_ani.sc_noise_floor = ATH_DEFAULT_NOISE_FLOOR;
+
 	/* Get the hardware key cache size. */
 	sc->sc_keymax = ah->ah_caps.keycache_size;
 	if (sc->sc_keymax > ATH_KEYMAX) {
@@ -1098,6 +1211,8 @@ int ath_init(u16 devid, struct ath_softc *sc)
 		goto bad2;
 	}
 
+	setup_timer(&sc->sc_ani.timer, ath_ani_calibrate, (unsigned long)sc);
+
 	sc->sc_rc = ath_rate_attach(ah);
 	if (sc->sc_rc == NULL) {
 		error = -EIO;
diff --git a/drivers/net/wireless/ath9k/core.h b/drivers/net/wireless/ath9k/core.h
index 5b4f1c48a61..cb3e61e57c4 100644
--- a/drivers/net/wireless/ath9k/core.h
+++ b/drivers/net/wireless/ath9k/core.h
@@ -800,6 +800,28 @@ void ath_slow_ant_div(struct ath_antdiv *antdiv,
 		      struct ath_rx_status *rx_stats);
 void ath_setdefantenna(void *sc, u32 antenna);
 
+/*******/
+/* ANI */
+/*******/
+
+/* ANI values for STA only.
+   FIXME: Add appropriate values for AP later */
+
+#define ATH_ANI_POLLINTERVAL    100     /* 100 milliseconds between ANI poll */
+#define ATH_SHORT_CALINTERVAL   1000    /* 1 second between calibrations */
+#define ATH_LONG_CALINTERVAL    30000   /* 30 seconds between calibrations */
+#define ATH_RESTART_CALINTERVAL 1200000 /* 20 minutes between calibrations */
+
+struct ath_ani {
+	bool sc_caldone;
+	int16_t sc_noise_floor;
+	unsigned int sc_longcal_timer;
+	unsigned int sc_shortcal_timer;
+	unsigned int sc_resetcal_timer;
+	unsigned int sc_checkani_timer;
+	struct timer_list timer;
+};
+
 /********************/
 /*   LED Control    */
 /********************/
@@ -1028,6 +1050,9 @@ struct ath_softc {
 
 	/* Rfkill */
 	struct ath_rfkill rf_kill;
+
+	/* ANI */
+	struct ath_ani sc_ani;
 };
 
 int ath_init(u16 devid, struct ath_softc *sc);
diff --git a/drivers/net/wireless/ath9k/hw.c b/drivers/net/wireless/ath9k/hw.c
index 272c7581660..62e44a0ef99 100644
--- a/drivers/net/wireless/ath9k/hw.c
+++ b/drivers/net/wireless/ath9k/hw.c
@@ -329,7 +329,7 @@ static void ath9k_hw_set_defaults(struct ath_hal *ah)
 	ah->ah_config.ofdm_trig_high = 500;
 	ah->ah_config.cck_trig_high = 200;
 	ah->ah_config.cck_trig_low = 100;
-	ah->ah_config.enable_ani = 0;
+	ah->ah_config.enable_ani = 1;
 	ah->ah_config.noise_immunity_level = 4;
 	ah->ah_config.ofdm_weaksignal_det = 1;
 	ah->ah_config.cck_weaksignal_thr = 0;
@@ -8405,23 +8405,48 @@ u32 ath9k_hw_mhz2ieee(struct ath_hal *ah, u32 freq, u32 flags)
 	}
 }
 
-int16_t
+/* We can tune this as we go by monitoring really low values */
+#define ATH9K_NF_TOO_LOW	-60
+
+/* AR5416 may return very high value (like -31 dBm), in those cases the nf
+ * is incorrect and we should use the static NF value. Later we can try to
+ * find out why they are reporting these values */
+static bool ath9k_hw_nf_in_range(struct ath_hal *ah, s16 nf)
+{
+	if (nf > ATH9K_NF_TOO_LOW) {
+		DPRINTF(ah->ah_sc, ATH_DBG_NF_CAL,
+			 "%s: noise floor value detected (%d) is "
+			"lower than what we think is a "
+			"reasonable value (%d)\n",
+			 __func__, nf, ATH9K_NF_TOO_LOW);
+		return false;
+	}
+	return true;
+}
+
+s16
 ath9k_hw_getchan_noise(struct ath_hal *ah, struct ath9k_channel *chan)
 {
 	struct ath9k_channel *ichan;
+	s16 nf;
 
 	ichan = ath9k_regd_check_channel(ah, chan);
 	if (ichan == NULL) {
 		DPRINTF(ah->ah_sc, ATH_DBG_NF_CAL,
 			 "%s: invalid channel %u/0x%x; no mapping\n",
 			 __func__, chan->channel, chan->channelFlags);
-		return 0;
+		return ATH_DEFAULT_NOISE_FLOOR;
 	}
 	if (ichan->rawNoiseFloor == 0) {
 		enum wireless_mode mode = ath9k_hw_chan2wmode(ah, chan);
-		return NOISE_FLOOR[mode];
+		nf = NOISE_FLOOR[mode];
 	} else
-		return ichan->rawNoiseFloor;
+		nf = ichan->rawNoiseFloor;
+
+	if (!ath9k_hw_nf_in_range(ah, nf))
+		nf = ATH_DEFAULT_NOISE_FLOOR;
+
+	return nf;
 }
 
 bool ath9k_hw_set_tsfadjust(struct ath_hal *ah, u32 setting)
diff --git a/drivers/net/wireless/ath9k/main.c b/drivers/net/wireless/ath9k/main.c
index 2caba440316..74726990d59 100644
--- a/drivers/net/wireless/ath9k/main.c
+++ b/drivers/net/wireless/ath9k/main.c
@@ -274,10 +274,12 @@ static void ath9k_rx_prepare(struct ath_softc *sc,
 	rx_status->mactime = status->tsf;
 	rx_status->band = curchan->band;
 	rx_status->freq =  curchan->center_freq;
-	rx_status->noise = ATH_DEFAULT_NOISE_FLOOR;
+	rx_status->noise = sc->sc_ani.sc_noise_floor;
 	rx_status->signal = rx_status->noise + status->rssi;
 	rx_status->rate_idx = ath_rate2idx(sc, (status->rateKbps / 100));
 	rx_status->antenna = status->antenna;
+
+	/* XXX Fix me, 64 cannot be the max rssi value, rigure it out */
 	rx_status->qual = status->rssi * 100 / 64;
 
 	if (status->flags & ATH_RX_MIC_ERROR)
@@ -427,6 +429,11 @@ static void ath9k_bss_assoc_info(struct ath_softc *sc,
 		ath_rate_newstate(sc, avp);
 		/* Update ratectrl about the new state */
 		ath_rc_node_update(hw, avp->rc_node);
+
+		/* Start ANI */
+		mod_timer(&sc->sc_ani.timer,
+			jiffies + msecs_to_jiffies(ATH_ANI_POLLINTERVAL));
+
 	} else {
 		DPRINTF(sc, ATH_DBG_CONFIG,
 		"%s: Bss Info DISSOC\n", __func__);
@@ -1173,6 +1180,13 @@ static int ath9k_add_interface(struct ieee80211_hw *hw,
 		return error;
 	}
 
+	if (conf->type == NL80211_IFTYPE_AP) {
+		/* TODO: is this a suitable place to start ANI for AP mode? */
+		/* Start ANI */
+		mod_timer(&sc->sc_ani.timer,
+			  jiffies + msecs_to_jiffies(ATH_ANI_POLLINTERVAL));
+	}
+
 	return 0;
 }
 
@@ -1195,6 +1209,8 @@ static void ath9k_remove_interface(struct ieee80211_hw *hw,
 #ifdef CONFIG_SLOW_ANT_DIV
 	ath_slow_ant_div_stop(&sc->sc_antdiv);
 #endif
+	/* Stop ANI */
+	del_timer_sync(&sc->sc_ani.timer);
 
 	/* Update ratectrl */
 	ath_rate_newstate(sc, avp);
diff --git a/drivers/net/wireless/ath9k/recv.c b/drivers/net/wireless/ath9k/recv.c
index f4be5d11c9d..4983402af55 100644
--- a/drivers/net/wireless/ath9k/recv.c
+++ b/drivers/net/wireless/ath9k/recv.c
@@ -999,20 +999,11 @@ int ath_rx_tasklet(struct ath_softc *sc, int flush)
 				rx_status.flags |= ATH_RX_SHORT_GI;
 		}
 
-		/* sc->sc_noise_floor is only available when the station
+		/* sc_noise_floor is only available when the station
 		   attaches to an AP, so we use a default value
 		   if we are not yet attached. */
-
-		/* XXX we should use either sc->sc_noise_floor or
-		 * ath_hal_getChanNoise(ah, &sc->sc_curchan)
-		 * to calculate the noise floor.
-		 * However, the value returned by ath_hal_getChanNoise
-		 * seems to be incorrect (-31dBm on the last test),
-		 * so we will use a hard-coded value until we
-		 * figure out what is going on.
-		 */
 		rx_status.abs_rssi =
-			ds->ds_rxstat.rs_rssi + ATH_DEFAULT_NOISE_FLOOR;
+			ds->ds_rxstat.rs_rssi + sc->sc_ani.sc_noise_floor;
 
 		pci_dma_sync_single_for_cpu(sc->pdev,
 					    bf->bf_buf_addr,
-- 
cgit v1.2.3


From 5d6ffc533678c936e366809acaff8401af43a4af Mon Sep 17 00:00:00 2001
From: Davide Pesavento <davidepesa@gmail.com>
Date: Tue, 30 Sep 2008 19:56:34 +0200
Subject: wireless: fix typo in Kconfig.

Signed-off-by: Davide Pesavento <davidepesa@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---
 net/wireless/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/wireless/Kconfig b/net/wireless/Kconfig
index b97bd9fe6b7..7d82be07fa1 100644
--- a/net/wireless/Kconfig
+++ b/net/wireless/Kconfig
@@ -15,7 +15,7 @@ config NL80211
 	  If unsure, say Y.
 
 config WIRELESS_OLD_REGULATORY
-	bool "Old wireless static regulatory defintions"
+	bool "Old wireless static regulatory definitions"
 	default n
 	---help---
 	  This option enables the old static regulatory information
-- 
cgit v1.2.3


From cf3e74c2e4a438480c11782b17e90029f5d24696 Mon Sep 17 00:00:00 2001
From: Christian Lamparter <chunkeey@web.de>
Date: Tue, 30 Sep 2008 23:36:00 +0200
Subject: p54: report appropriate rate and band values for 802.11a

This patch adds the a few lines that went missing in
"p54: 802.11a 5GHz phy support"

Essentially: the rx-code wasn't updated and therefore reported the wrong band,
but more importantly the rate index was off as well, since 802.11a doesn't
allow the "four" 802.11b rates...

Signed-off-by: Christian Lamparter <chunkeey@web.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---
 drivers/net/wireless/p54/p54common.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/net/wireless/p54/p54common.c b/drivers/net/wireless/p54/p54common.c
index de5e8f44b20..1994aa199d3 100644
--- a/drivers/net/wireless/p54/p54common.c
+++ b/drivers/net/wireless/p54/p54common.c
@@ -507,9 +507,10 @@ static int p54_rx_data(struct ieee80211_hw *dev, struct sk_buff *skb)
 	rx_status.noise = priv->noise;
 	/* XX correct? */
 	rx_status.qual = (100 * hdr->rssi) / 127;
-	rx_status.rate_idx = hdr->rate & 0xf;
+	rx_status.rate_idx = (dev->conf.channel->band == IEEE80211_BAND_2GHZ ?
+			hdr->rate : (hdr->rate - 4)) & 0xf;
 	rx_status.freq = freq;
-	rx_status.band = IEEE80211_BAND_2GHZ;
+	rx_status.band =  dev->conf.channel->band;
 	rx_status.antenna = hdr->antenna;
 
 	tsf32 = le32_to_cpu(hdr->tsf32);
-- 
cgit v1.2.3


From f74b6a5498049bab28419a03e4b31fcdbe7a900d Mon Sep 17 00:00:00 2001
From: Rami Rosen <roszenrami@gmail.com>
Date: Thu, 2 Oct 2008 16:48:22 +0300
Subject: mac80211: remove redundant check in ieee80211_master_start_xmit
 (net/mac80211/tx.c)

 - This patch (against the linux-wireless-next git tree) removes a
redundant check in ieee80211_master_start_xmit (net/mac80211/tx.c)
and adjust indentation in this method accordingly.

 In this method, there is no need to call again the
ieee80211_is_data() method; this is checked immediately before, in the
"if" command (we will not enter this block unless ieee80211_is_data()
is true, so that the "and" (&&) condition in that "if" command will be
fullfilled ).

Signed-off-by: Rami Rosen <ramirose@gmail.com>
Acked-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---
 net/mac80211/tx.c | 18 ++++++++----------
 1 file changed, 8 insertions(+), 10 deletions(-)

diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index 226ce77363d..d7153bbcdb2 100644
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -1295,16 +1295,14 @@ int ieee80211_master_start_xmit(struct sk_buff *skb, struct net_device *dev)
 
 	if (ieee80211_vif_is_mesh(&osdata->vif) &&
 	    ieee80211_is_data(hdr->frame_control)) {
-		if (ieee80211_is_data(hdr->frame_control)) {
-			if (is_multicast_ether_addr(hdr->addr3))
-				memcpy(hdr->addr1, hdr->addr3, ETH_ALEN);
-			else
-				if (mesh_nexthop_lookup(skb, osdata))
-					return  0;
-			if (memcmp(odev->dev_addr, hdr->addr4, ETH_ALEN) != 0)
-				IEEE80211_IFSTA_MESH_CTR_INC(&osdata->u.mesh,
-							     fwded_frames);
-		}
+		if (is_multicast_ether_addr(hdr->addr3))
+			memcpy(hdr->addr1, hdr->addr3, ETH_ALEN);
+		else
+			if (mesh_nexthop_lookup(skb, osdata))
+				return  0;
+		if (memcmp(odev->dev_addr, hdr->addr4, ETH_ALEN) != 0)
+			IEEE80211_IFSTA_MESH_CTR_INC(&osdata->u.mesh,
+							    fwded_frames);
 	} else if (unlikely(osdata->vif.type == NL80211_IFTYPE_MONITOR)) {
 		struct ieee80211_sub_if_data *sdata;
 		int hdrlen;
-- 
cgit v1.2.3


From 5b5d13afeeee959a74114b73c560d3e243f34a11 Mon Sep 17 00:00:00 2001
From: Gertjan van Wingerde <gwingerde@kpnplanet.nl>
Date: Fri, 3 Oct 2008 20:20:32 +0200
Subject: rt2x00: Fix rfkill structure initialization to prevent rfkill
 WARN_ON.

The state field of the rfkill structure was incorrectly initialized to -1, which results in rfkill
issueing a WARN_ON. Fix this by initializing the state field to the proper value as indicated by
the driver.

Signed-off-by: Gertjan van Wingerde <gwingerde@kpnplanet.nl>
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---
 drivers/net/wireless/rt2x00/rt2x00rfkill.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/net/wireless/rt2x00/rt2x00rfkill.c b/drivers/net/wireless/rt2x00/rt2x00rfkill.c
index 55eff58f188..c3f53a92180 100644
--- a/drivers/net/wireless/rt2x00/rt2x00rfkill.c
+++ b/drivers/net/wireless/rt2x00/rt2x00rfkill.c
@@ -145,10 +145,15 @@ void rt2x00rfkill_allocate(struct rt2x00_dev *rt2x00dev)
 
 	rt2x00dev->rfkill->name = rt2x00dev->ops->name;
 	rt2x00dev->rfkill->data = rt2x00dev;
-	rt2x00dev->rfkill->state = -1;
 	rt2x00dev->rfkill->toggle_radio = rt2x00rfkill_toggle_radio;
-	if (test_bit(CONFIG_SUPPORT_HW_BUTTON, &rt2x00dev->flags))
+	if (test_bit(CONFIG_SUPPORT_HW_BUTTON, &rt2x00dev->flags)) {
 		rt2x00dev->rfkill->get_state = rt2x00rfkill_get_state;
+		rt2x00dev->rfkill->state =
+			rt2x00dev->ops->lib->rfkill_poll(rt2x00dev) ?
+			    RFKILL_STATE_SOFT_BLOCKED : RFKILL_STATE_UNBLOCKED;
+	} else {
+		rt2x00dev->rfkill->state = RFKILL_STATE_UNBLOCKED;
+	}
 
 	INIT_DELAYED_WORK(&rt2x00dev->rfkill_work, rt2x00rfkill_poll);
 
-- 
cgit v1.2.3


From 417bd25ac4c6f76c8aafe8a584f3620f4a936b72 Mon Sep 17 00:00:00 2001
From: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Date: Fri, 3 Oct 2008 16:58:05 -0300
Subject: rfkill: update LEDs for all state changes

The LED state was not being updated by rfkill_force_state(), which
will cause regressions in wireless drivers that had old-style rfkill
support and are updated to use rfkill_force_state().

The LED state was not being updated when a change was detected through
the rfkill->get_state() hook, either.

Move the LED trigger update calls into notify_rfkill_state_change(),
where it should have been in the first place.  This takes care of both
issues above.

Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Acked-by: Ivo van Doorn <IvDoorn@gmail.com>
Cc: stable@kernel.org
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---
 net/rfkill/rfkill.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/net/rfkill/rfkill.c b/net/rfkill/rfkill.c
index ea0dc04b3c7..f949a482b00 100644
--- a/net/rfkill/rfkill.c
+++ b/net/rfkill/rfkill.c
@@ -125,6 +125,7 @@ static void rfkill_led_trigger_activate(struct led_classdev *led)
 
 static void notify_rfkill_state_change(struct rfkill *rfkill)
 {
+	rfkill_led_trigger(rfkill, rfkill->state);
 	blocking_notifier_call_chain(&rfkill_notifier_list,
 			RFKILL_STATE_CHANGED,
 			rfkill);
@@ -217,10 +218,8 @@ static int rfkill_toggle_radio(struct rfkill *rfkill,
 			rfkill->state = state;
 	}
 
-	if (force || rfkill->state != oldstate) {
-		rfkill_led_trigger(rfkill, rfkill->state);
+	if (force || rfkill->state != oldstate)
 		notify_rfkill_state_change(rfkill);
-	}
 
 	return retval;
 }
-- 
cgit v1.2.3


From 76708dee382a69b2f9d0e50f413f99fefb2dc509 Mon Sep 17 00:00:00 2001
From: Felix Fietkau <nbd@openwrt.org>
Date: Sun, 5 Oct 2008 18:02:48 +0200
Subject: mac80211: free up 2 bytes in skb->cb

Free up 2 bytes in skb->cb to be used for multi-rate retry later.
Move iv_len and icv_len initialization into key alloc.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---
 drivers/net/wireless/ath5k/base.c          |  2 +-
 drivers/net/wireless/ath9k/xmit.c          |  2 +-
 drivers/net/wireless/b43/xmit.c            |  4 ++--
 drivers/net/wireless/b43legacy/xmit.c      |  4 ++--
 drivers/net/wireless/rt2x00/rt2x00crypto.c |  4 ++--
 drivers/net/wireless/rt2x00/rt2x00queue.c  |  7 +++++--
 include/net/mac80211.h                     |  4 ++--
 net/mac80211/key.c                         | 14 ++++++++++++++
 net/mac80211/wep.c                         |  3 ---
 net/mac80211/wpa.c                         |  6 ------
 10 files changed, 29 insertions(+), 21 deletions(-)

diff --git a/drivers/net/wireless/ath5k/base.c b/drivers/net/wireless/ath5k/base.c
index c151588aa48..47be49acf55 100644
--- a/drivers/net/wireless/ath5k/base.c
+++ b/drivers/net/wireless/ath5k/base.c
@@ -1188,7 +1188,7 @@ ath5k_txbuf_setup(struct ath5k_softc *sc, struct ath5k_buf *bf)
 
 	if (info->control.hw_key) {
 		keyidx = info->control.hw_key->hw_key_idx;
-		pktlen += info->control.icv_len;
+		pktlen += info->control.hw_key->icv_len;
 	}
 	ret = ah->ah_setup_tx_desc(ah, ds, pktlen,
 		ieee80211_get_hdrlen_from_skb(skb), AR5K_PKT_TYPE_NORMAL,
diff --git a/drivers/net/wireless/ath9k/xmit.c b/drivers/net/wireless/ath9k/xmit.c
index bdcb9e1799c..3a4757942b3 100644
--- a/drivers/net/wireless/ath9k/xmit.c
+++ b/drivers/net/wireless/ath9k/xmit.c
@@ -237,7 +237,7 @@ static int ath_tx_prepare(struct ath_softc *sc,
 
 	if (tx_info->control.hw_key) {
 		txctl->keyix = tx_info->control.hw_key->hw_key_idx;
-		txctl->frmlen += tx_info->control.icv_len;
+		txctl->frmlen += tx_info->control.hw_key->icv_len;
 
 		if (tx_info->control.hw_key->alg == ALG_WEP)
 			txctl->keytype = ATH9K_KEY_TYPE_WEP;
diff --git a/drivers/net/wireless/b43/xmit.c b/drivers/net/wireless/b43/xmit.c
index 5e0b71c3ad0..e0749c0074c 100644
--- a/drivers/net/wireless/b43/xmit.c
+++ b/drivers/net/wireless/b43/xmit.c
@@ -252,7 +252,7 @@ int b43_generate_txhdr(struct b43_wldev *dev,
 		}
 
 		/* Hardware appends ICV. */
-		plcp_fragment_len += info->control.icv_len;
+		plcp_fragment_len += info->control.hw_key->icv_len;
 
 		key_idx = b43_kidx_to_fw(dev, key_idx);
 		mac_ctl |= (key_idx << B43_TXH_MAC_KEYIDX_SHIFT) &
@@ -260,7 +260,7 @@ int b43_generate_txhdr(struct b43_wldev *dev,
 		mac_ctl |= (key->algorithm << B43_TXH_MAC_KEYALG_SHIFT) &
 			   B43_TXH_MAC_KEYALG;
 		wlhdr_len = ieee80211_hdrlen(fctl);
-		iv_len = min((size_t) info->control.iv_len,
+		iv_len = min((size_t) info->control.hw_key->iv_len,
 			     ARRAY_SIZE(txhdr->iv));
 		memcpy(txhdr->iv, ((u8 *) wlhdr) + wlhdr_len, iv_len);
 	}
diff --git a/drivers/net/wireless/b43legacy/xmit.c b/drivers/net/wireless/b43legacy/xmit.c
index 6835064758f..a894169411c 100644
--- a/drivers/net/wireless/b43legacy/xmit.c
+++ b/drivers/net/wireless/b43legacy/xmit.c
@@ -243,7 +243,7 @@ static int generate_txhdr_fw3(struct b43legacy_wldev *dev,
 
 		if (key->enabled) {
 			/* Hardware appends ICV. */
-			plcp_fragment_len += info->control.icv_len;
+			plcp_fragment_len += info->control.hw_key->icv_len;
 
 			key_idx = b43legacy_kidx_to_fw(dev, key_idx);
 			mac_ctl |= (key_idx << B43legacy_TX4_MAC_KEYIDX_SHIFT) &
@@ -252,7 +252,7 @@ static int generate_txhdr_fw3(struct b43legacy_wldev *dev,
 				   B43legacy_TX4_MAC_KEYALG_SHIFT) &
 				   B43legacy_TX4_MAC_KEYALG;
 			wlhdr_len = ieee80211_hdrlen(wlhdr->frame_control);
-			iv_len = min((size_t)info->control.iv_len,
+			iv_len = min((size_t)info->control.hw_key->iv_len,
 				     ARRAY_SIZE(txhdr->iv));
 			memcpy(txhdr->iv, ((u8 *)wlhdr) + wlhdr_len, iv_len);
 		} else {
diff --git a/drivers/net/wireless/rt2x00/rt2x00crypto.c b/drivers/net/wireless/rt2x00/rt2x00crypto.c
index e1448cfa944..5a858e5106c 100644
--- a/drivers/net/wireless/rt2x00/rt2x00crypto.c
+++ b/drivers/net/wireless/rt2x00/rt2x00crypto.c
@@ -56,10 +56,10 @@ unsigned int rt2x00crypto_tx_overhead(struct ieee80211_tx_info *tx_info)
 	 * note that these lengths should only be added when
 	 * mac80211 does not generate it.
 	 */
-	overhead += tx_info->control.icv_len;
+	overhead += key->icv_len;
 
 	if (!(key->flags & IEEE80211_KEY_FLAG_GENERATE_IV))
-		overhead += tx_info->control.iv_len;
+		overhead += key->iv_len;
 
 	if (!(key->flags & IEEE80211_KEY_FLAG_GENERATE_MMIC)) {
 		if (key->alg == ALG_TKIP)
diff --git a/drivers/net/wireless/rt2x00/rt2x00queue.c b/drivers/net/wireless/rt2x00/rt2x00queue.c
index b7f4fe8fba6..1676ac48479 100644
--- a/drivers/net/wireless/rt2x00/rt2x00queue.c
+++ b/drivers/net/wireless/rt2x00/rt2x00queue.c
@@ -374,7 +374,7 @@ int rt2x00queue_write_tx_frame(struct data_queue *queue, struct sk_buff *skb)
 	struct queue_entry *entry = rt2x00queue_get_entry(queue, Q_INDEX);
 	struct txentry_desc txdesc;
 	struct skb_frame_desc *skbdesc;
-	unsigned int iv_len = IEEE80211_SKB_CB(skb)->control.iv_len;
+	unsigned int iv_len;
 
 	if (unlikely(rt2x00queue_full(queue)))
 		return -EINVAL;
@@ -410,8 +410,11 @@ int rt2x00queue_write_tx_frame(struct data_queue *queue, struct sk_buff *skb)
 	 * the frame so we can provide it to the driver seperately.
 	 */
 	if (test_bit(ENTRY_TXD_ENCRYPT, &txdesc.flags) &&
-	    !test_bit(ENTRY_TXD_ENCRYPT_IV, &txdesc.flags))
+	    !test_bit(ENTRY_TXD_ENCRYPT_IV, &txdesc.flags) &&
+		(IEEE80211_SKB_CB(skb)->control.hw_key != NULL)) {
+		iv_len = IEEE80211_SKB_CB(skb)->control.hw_key->iv_len;
 		rt2x00crypto_tx_remove_iv(skb, iv_len);
+	}
 
 	/*
 	 * It could be possible that the queue was corrupted and this
diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index f5f5b1ff158..feb3be81dfa 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -337,8 +337,6 @@ struct ieee80211_tx_info {
 			unsigned long jiffies;
 			s8 rts_cts_rate_idx, alt_retry_rate_idx;
 			u8 retry_limit;
-			u8 icv_len;
-			u8 iv_len;
 		} control;
 		struct {
 			u64 ampdu_ack_map;
@@ -635,6 +633,8 @@ enum ieee80211_key_flags {
  */
 struct ieee80211_key_conf {
 	enum ieee80211_key_alg alg;
+	u8 icv_len;
+	u8 iv_len;
 	u8 hw_key_idx;
 	u8 flags;
 	s8 keyidx;
diff --git a/net/mac80211/key.c b/net/mac80211/key.c
index 57afcd38cd9..a5b06fe7198 100644
--- a/net/mac80211/key.c
+++ b/net/mac80211/key.c
@@ -281,6 +281,20 @@ struct ieee80211_key *ieee80211_key_alloc(enum ieee80211_key_alg alg,
 	key->conf.alg = alg;
 	key->conf.keyidx = idx;
 	key->conf.keylen = key_len;
+	switch (alg) {
+	case ALG_WEP:
+		key->conf.iv_len = WEP_IV_LEN;
+		key->conf.icv_len = WEP_ICV_LEN;
+		break;
+	case ALG_TKIP:
+		key->conf.iv_len = TKIP_IV_LEN;
+		key->conf.icv_len = TKIP_ICV_LEN;
+		break;
+	case ALG_CCMP:
+		key->conf.iv_len = CCMP_HDR_LEN;
+		key->conf.icv_len = CCMP_MIC_LEN;
+		break;
+	}
 	memcpy(key->conf.key, key_data, key_len);
 	INIT_LIST_HEAD(&key->list);
 	INIT_LIST_HEAD(&key->todo);
diff --git a/net/mac80211/wep.c b/net/mac80211/wep.c
index 376c84987e4..f0e2d3ecb5c 100644
--- a/net/mac80211/wep.c
+++ b/net/mac80211/wep.c
@@ -313,9 +313,6 @@ static int wep_encrypt_skb(struct ieee80211_tx_data *tx, struct sk_buff *skb)
 {
 	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 
-	info->control.iv_len = WEP_IV_LEN;
-	info->control.icv_len = WEP_ICV_LEN;
-
 	if (!(tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)) {
 		if (ieee80211_wep_encrypt(tx->local, skb, tx->key))
 			return -1;
diff --git a/net/mac80211/wpa.c b/net/mac80211/wpa.c
index 37ae9a959f6..6db649480e8 100644
--- a/net/mac80211/wpa.c
+++ b/net/mac80211/wpa.c
@@ -152,9 +152,6 @@ static int tkip_encrypt_skb(struct ieee80211_tx_data *tx, struct sk_buff *skb)
 	int len, tail;
 	u8 *pos;
 
-	info->control.icv_len = TKIP_ICV_LEN;
-	info->control.iv_len = TKIP_IV_LEN;
-
 	if ((tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE) &&
 	    !(tx->key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV)) {
 		/* hwaccel - with no need for preallocated room for IV/ICV */
@@ -374,9 +371,6 @@ static int ccmp_encrypt_skb(struct ieee80211_tx_data *tx, struct sk_buff *skb)
 	u8 *pos, *pn;
 	int i;
 
-	info->control.icv_len = CCMP_MIC_LEN;
-	info->control.iv_len = CCMP_HDR_LEN;
-
 	if ((tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE) &&
 	    !(tx->key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV)) {
 		/* hwaccel - with no need for preallocated room for CCMP "
-- 
cgit v1.2.3


From 870abdf67170daa9f1022e55a35c469239fcc74c Mon Sep 17 00:00:00 2001
From: Felix Fietkau <nbd@openwrt.org>
Date: Sun, 5 Oct 2008 18:04:24 +0200
Subject: mac80211: add multi-rate retry support

This patch adjusts the rate control API to allow multi-rate retry
if supported by the driver. The ieee80211_hw struct specifies how
many alternate rate selections the driver supports.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---
 drivers/net/wireless/b43/main.c       |  1 +
 drivers/net/wireless/b43/xmit.c       |  2 +-
 drivers/net/wireless/b43legacy/main.c |  1 +
 drivers/net/wireless/b43legacy/xmit.c |  2 +-
 drivers/net/wireless/rtl8180_dev.c    |  5 +++--
 include/net/mac80211.h                | 29 +++++++++++++++++++++++++----
 net/mac80211/tx.c                     | 13 +++++++------
 7 files changed, 39 insertions(+), 14 deletions(-)

diff --git a/drivers/net/wireless/b43/main.c b/drivers/net/wireless/b43/main.c
index 3bf74e236ab..14c44df584d 100644
--- a/drivers/net/wireless/b43/main.c
+++ b/drivers/net/wireless/b43/main.c
@@ -4588,6 +4588,7 @@ static int b43_wireless_init(struct ssb_device *dev)
 		BIT(NL80211_IFTYPE_ADHOC);
 
 	hw->queues = b43_modparam_qos ? 4 : 1;
+	hw->max_altrates = 1;
 	SET_IEEE80211_DEV(hw, dev->dev);
 	if (is_valid_ether_addr(sprom->et1mac))
 		SET_IEEE80211_PERM_ADDR(hw, sprom->et1mac);
diff --git a/drivers/net/wireless/b43/xmit.c b/drivers/net/wireless/b43/xmit.c
index e0749c0074c..2fabcf8f047 100644
--- a/drivers/net/wireless/b43/xmit.c
+++ b/drivers/net/wireless/b43/xmit.c
@@ -208,7 +208,7 @@ int b43_generate_txhdr(struct b43_wldev *dev,
 	txrate = ieee80211_get_tx_rate(dev->wl->hw, info);
 	rate = txrate ? txrate->hw_value : B43_CCK_RATE_1MB;
 	rate_ofdm = b43_is_ofdm_rate(rate);
-	fbrate = ieee80211_get_alt_retry_rate(dev->wl->hw, info) ? : txrate;
+	fbrate = ieee80211_get_alt_retry_rate(dev->wl->hw, info, 0) ? : txrate;
 	rate_fb = fbrate->hw_value;
 	rate_fb_ofdm = b43_is_ofdm_rate(rate_fb);
 
diff --git a/drivers/net/wireless/b43legacy/main.c b/drivers/net/wireless/b43legacy/main.c
index 9fb1421cbec..c66d57560e7 100644
--- a/drivers/net/wireless/b43legacy/main.c
+++ b/drivers/net/wireless/b43legacy/main.c
@@ -3710,6 +3710,7 @@ static int b43legacy_wireless_init(struct ssb_device *dev)
 		BIT(NL80211_IFTYPE_WDS) |
 		BIT(NL80211_IFTYPE_ADHOC);
 	hw->queues = 1; /* FIXME: hardware has more queues */
+	hw->max_altrates = 1;
 	SET_IEEE80211_DEV(hw, dev->dev);
 	if (is_valid_ether_addr(sprom->et1mac))
 		SET_IEEE80211_PERM_ADDR(hw, sprom->et1mac);
diff --git a/drivers/net/wireless/b43legacy/xmit.c b/drivers/net/wireless/b43legacy/xmit.c
index a894169411c..65e83378160 100644
--- a/drivers/net/wireless/b43legacy/xmit.c
+++ b/drivers/net/wireless/b43legacy/xmit.c
@@ -210,7 +210,7 @@ static int generate_txhdr_fw3(struct b43legacy_wldev *dev,
 
 	rate = tx_rate->hw_value;
 	rate_ofdm = b43legacy_is_ofdm_rate(rate);
-	rate_fb = ieee80211_get_alt_retry_rate(dev->wl->hw, info) ? : tx_rate;
+	rate_fb = ieee80211_get_alt_retry_rate(dev->wl->hw, info, 0) ? : tx_rate;
 	rate_fb_ofdm = b43legacy_is_ofdm_rate(rate_fb->hw_value);
 
 	txhdr->mac_frame_ctl = wlhdr->frame_control;
diff --git a/drivers/net/wireless/rtl8180_dev.c b/drivers/net/wireless/rtl8180_dev.c
index abcd641c54b..df7e78ee8a8 100644
--- a/drivers/net/wireless/rtl8180_dev.c
+++ b/drivers/net/wireless/rtl8180_dev.c
@@ -292,8 +292,8 @@ static int rtl8180_tx(struct ieee80211_hw *dev, struct sk_buff *skb)
 	entry->plcp_len = cpu_to_le16(plcp_len);
 	entry->tx_buf = cpu_to_le32(mapping);
 	entry->frame_len = cpu_to_le32(skb->len);
-	entry->flags2 = info->control.alt_retry_rate_idx >= 0 ?
-		ieee80211_get_alt_retry_rate(dev, info)->bitrate << 4 : 0;
+	entry->flags2 = info->control.retries[0].rate_idx >= 0 ?
+		ieee80211_get_alt_retry_rate(dev, info, 0)->bitrate << 4 : 0;
 	entry->retry_limit = info->control.retry_limit;
 	entry->flags = cpu_to_le32(tx_flags);
 	__skb_queue_tail(&ring->queue, skb);
@@ -855,6 +855,7 @@ static int __devinit rtl8180_probe(struct pci_dev *pdev,
 	priv = dev->priv;
 	priv->pdev = pdev;
 
+	dev->max_altrates = 1;
 	SET_IEEE80211_DEV(dev, &pdev->dev);
 	pci_set_drvdata(pdev, dev);
 
diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index feb3be81dfa..5617a1613c9 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -292,6 +292,20 @@ enum mac80211_tx_control_flags {
 #define IEEE80211_TX_INFO_DRIVER_DATA_PTRS \
 	(IEEE80211_TX_INFO_DRIVER_DATA_SIZE / sizeof(void *))
 
+/* maximum number of alternate rate retry stages */
+#define IEEE80211_TX_MAX_ALTRATE	3
+
+/**
+ * struct ieee80211_tx_altrate - alternate rate selection/status
+ *
+ * @rate_idx: rate index to attempt to send with
+ * @limit: number of retries before fallback
+ */
+struct ieee80211_tx_altrate {
+	s8 rate_idx;
+	u8 limit;
+};
+
 /**
  * struct ieee80211_tx_info - skb transmit information
  *
@@ -335,12 +349,14 @@ struct ieee80211_tx_info {
 			struct ieee80211_key_conf *hw_key;
 			struct ieee80211_sta *sta;
 			unsigned long jiffies;
-			s8 rts_cts_rate_idx, alt_retry_rate_idx;
+			s8 rts_cts_rate_idx;
 			u8 retry_limit;
+			struct ieee80211_tx_altrate retries[IEEE80211_TX_MAX_ALTRATE];
 		} control;
 		struct {
 			u64 ampdu_ack_map;
 			int ack_signal;
+			struct ieee80211_tx_altrate retries[IEEE80211_TX_MAX_ALTRATE + 1];
 			u8 retry_count;
 			bool excessive_retries;
 			u8 ampdu_ack_len;
@@ -828,6 +844,9 @@ enum ieee80211_hw_flags {
  *	within &struct ieee80211_vif.
  * @sta_data_size: size (in bytes) of the drv_priv data area
  *	within &struct ieee80211_sta.
+ *
+ * @max_altrates: maximum number of alternate rate retry stages
+ * @max_altrate_tries: maximum number of tries for each stage
  */
 struct ieee80211_hw {
 	struct ieee80211_conf conf;
@@ -844,6 +863,8 @@ struct ieee80211_hw {
 	u16 ampdu_queues;
 	u16 max_listen_interval;
 	s8 max_signal;
+	u8 max_altrates;
+	u8 max_altrate_tries;
 };
 
 struct ieee80211_hw *wiphy_to_hw(struct wiphy *wiphy);
@@ -900,11 +921,11 @@ ieee80211_get_rts_cts_rate(const struct ieee80211_hw *hw,
 
 static inline struct ieee80211_rate *
 ieee80211_get_alt_retry_rate(const struct ieee80211_hw *hw,
-			     const struct ieee80211_tx_info *c)
+			     const struct ieee80211_tx_info *c, int idx)
 {
-	if (c->control.alt_retry_rate_idx < 0)
+	if (c->control.retries[idx].rate_idx < 0)
 		return NULL;
-	return &hw->wiphy->bands[c->band]->bitrates[c->control.alt_retry_rate_idx];
+	return &hw->wiphy->bands[c->band]->bitrates[c->control.retries[idx].rate_idx];
 }
 
 /**
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index d7153bbcdb2..1460537faf3 100644
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -454,15 +454,16 @@ ieee80211_tx_h_rate_ctrl(struct ieee80211_tx_data *tx)
 		if (unlikely(rsel.probe_idx >= 0)) {
 			info->flags |= IEEE80211_TX_CTL_RATE_CTRL_PROBE;
 			tx->flags |= IEEE80211_TX_PROBE_LAST_FRAG;
-			info->control.alt_retry_rate_idx = tx->rate_idx;
+			info->control.retries[0].rate_idx = tx->rate_idx;
+			info->control.retries[0].limit = tx->local->hw.max_altrate_tries;
 			tx->rate_idx = rsel.probe_idx;
-		} else
-			info->control.alt_retry_rate_idx = -1;
+		} else if (info->control.retries[0].limit == 0)
+			info->control.retries[0].rate_idx = -1;
 
 		if (unlikely(tx->rate_idx < 0))
 			return TX_DROP;
 	} else
-		info->control.alt_retry_rate_idx = -1;
+		info->control.retries[0].rate_idx = -1;
 
 	if (tx->sdata->bss_conf.use_cts_prot &&
 	    (tx->flags & IEEE80211_TX_FRAGMENTED) && (rsel.nonerp_idx >= 0)) {
@@ -521,7 +522,7 @@ ieee80211_tx_h_misc(struct ieee80211_tx_data *tx)
 		 * frames.
 		 * TODO: The last fragment could still use multiple retry
 		 * rates. */
-		info->control.alt_retry_rate_idx = -1;
+		info->control.retries[0].rate_idx = -1;
 	}
 
 	/* Use CTS protection for unicast frames sent using extended rates if
@@ -551,7 +552,7 @@ ieee80211_tx_h_misc(struct ieee80211_tx_data *tx)
 		int idx;
 
 		/* Do not use multiple retry rates when using RTS/CTS */
-		info->control.alt_retry_rate_idx = -1;
+		info->control.retries[0].rate_idx = -1;
 
 		/* Use min(data rate, max base rate) as CTS/RTS rate */
 		rate = &sband->bitrates[tx->rate_idx];
-- 
cgit v1.2.3


From 2f7fe87034298d94301315ba4bb65c7284c709d0 Mon Sep 17 00:00:00 2001
From: Felix Fietkau <nbd@openwrt.org>
Date: Sun, 5 Oct 2008 18:05:48 +0200
Subject: ath5k: implement multi-rate retry support, fix tx status reporting

Clean up the tx status reporting, fix retry counters (short retries are
virtual collisions, not actual retries). Implement multi-rate retry
support.
This also fixes strong throughput fluctuations with rc80211_pid

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---
 drivers/net/wireless/ath5k/ath5k.h |  4 ++-
 drivers/net/wireless/ath5k/base.c  | 48 ++++++++++++++++++++++++--
 drivers/net/wireless/ath5k/desc.c  | 69 ++++++++++++++++++++++++++------------
 3 files changed, 95 insertions(+), 26 deletions(-)

diff --git a/drivers/net/wireless/ath5k/ath5k.h b/drivers/net/wireless/ath5k/ath5k.h
index 7134c40d6a6..53ea439aff4 100644
--- a/drivers/net/wireless/ath5k/ath5k.h
+++ b/drivers/net/wireless/ath5k/ath5k.h
@@ -431,7 +431,9 @@ struct ath5k_tx_status {
 	u16	ts_seqnum;
 	u16	ts_tstamp;
 	u8	ts_status;
-	u8	ts_rate;
+	u8	ts_rate[4];
+	u8	ts_retry[4];
+	u8	ts_final_idx;
 	s8	ts_rssi;
 	u8	ts_shortretry;
 	u8	ts_longretry;
diff --git a/drivers/net/wireless/ath5k/base.c b/drivers/net/wireless/ath5k/base.c
index 47be49acf55..9b95c4049b3 100644
--- a/drivers/net/wireless/ath5k/base.c
+++ b/drivers/net/wireless/ath5k/base.c
@@ -541,6 +541,12 @@ ath5k_pci_probe(struct pci_dev *pdev,
 		goto err_irq;
 	}
 
+	/* set up multi-rate retry capabilities */
+	if (sc->ah->ah_version == AR5K_AR5212) {
+		hw->max_altrates = 3;
+		hw->max_altrate_tries = 11;
+	}
+
 	/* Finish private driver data initialization */
 	ret = ath5k_attach(pdev, hw);
 	if (ret)
@@ -1173,7 +1179,9 @@ ath5k_txbuf_setup(struct ath5k_softc *sc, struct ath5k_buf *bf)
 	struct sk_buff *skb = bf->skb;
 	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 	unsigned int pktlen, flags, keyidx = AR5K_TXKEYIX_INVALID;
-	int ret;
+	struct ieee80211_rate *rate;
+	unsigned int mrr_rate[3], mrr_tries[3];
+	int i, ret;
 
 	flags = AR5K_TXDESC_INTREQ | AR5K_TXDESC_CLRDMASK;
 
@@ -1198,6 +1206,22 @@ ath5k_txbuf_setup(struct ath5k_softc *sc, struct ath5k_buf *bf)
 	if (ret)
 		goto err_unmap;
 
+	memset(mrr_rate, 0, sizeof(mrr_rate));
+	memset(mrr_tries, 0, sizeof(mrr_tries));
+	for (i = 0; i < 3; i++) {
+		rate = ieee80211_get_alt_retry_rate(sc->hw, info, i);
+		if (!rate)
+			break;
+
+		mrr_rate[i] = rate->hw_value;
+		mrr_tries[i] = info->control.retries[i].limit;
+	}
+
+	ah->ah_setup_mrr_tx_desc(ah, ds,
+		mrr_rate[0], mrr_tries[0],
+		mrr_rate[1], mrr_tries[1],
+		mrr_rate[2], mrr_tries[2]);
+
 	ds->ds_link = 0;
 	ds->ds_data = bf->skbaddr;
 
@@ -1814,7 +1838,7 @@ ath5k_tx_processq(struct ath5k_softc *sc, struct ath5k_txq *txq)
 	struct ath5k_desc *ds;
 	struct sk_buff *skb;
 	struct ieee80211_tx_info *info;
-	int ret;
+	int i, ret;
 
 	spin_lock(&txq->lock);
 	list_for_each_entry_safe(bf, bf0, &txq->q, list) {
@@ -1836,7 +1860,25 @@ ath5k_tx_processq(struct ath5k_softc *sc, struct ath5k_txq *txq)
 		pci_unmap_single(sc->pdev, bf->skbaddr, skb->len,
 				PCI_DMA_TODEVICE);
 
-		info->status.retry_count = ts.ts_shortretry + ts.ts_longretry / 6;
+		memset(&info->status, 0, sizeof(info->status));
+		info->tx_rate_idx = ath5k_hw_to_driver_rix(sc,
+				ts.ts_rate[ts.ts_final_idx]);
+		info->status.retry_count = ts.ts_longretry;
+
+		for (i = 0; i < 4; i++) {
+			struct ieee80211_tx_altrate *r =
+				&info->status.retries[i];
+
+			if (ts.ts_rate[i]) {
+				r->rate_idx = ath5k_hw_to_driver_rix(sc, ts.ts_rate[i]);
+				r->limit = ts.ts_retry[i];
+			} else {
+				r->rate_idx = -1;
+				r->limit = 0;
+			}
+		}
+
+		info->status.excessive_retries = 0;
 		if (unlikely(ts.ts_status)) {
 			sc->ll_stats.dot11ACKFailureCount++;
 			if (ts.ts_status & AR5K_TXERR_XRETRY)
diff --git a/drivers/net/wireless/ath5k/desc.c b/drivers/net/wireless/ath5k/desc.c
index d45b90a6e06..dd1374052ba 100644
--- a/drivers/net/wireless/ath5k/desc.c
+++ b/drivers/net/wireless/ath5k/desc.c
@@ -318,6 +318,15 @@ ath5k_hw_setup_mrr_tx_desc(struct ath5k_hw *ah, struct ath5k_desc *desc,
 	return 0;
 }
 
+/* no mrr support for cards older than 5212 */
+static int
+ath5k_hw_setup_no_mrr(struct ath5k_hw *ah, struct ath5k_desc *desc,
+	unsigned int tx_rate1, u_int tx_tries1, u_int tx_rate2,
+	u_int tx_tries2, unsigned int tx_rate3, u_int tx_tries3)
+{
+	return 0;
+}
+
 /*
  * Proccess the tx status descriptor on 5210/5211
  */
@@ -352,8 +361,10 @@ static int ath5k_hw_proc_2word_tx_status(struct ath5k_hw *ah,
 		AR5K_DESC_TX_STATUS1_ACK_SIG_STRENGTH);
 	ts->ts_antenna = 1;
 	ts->ts_status = 0;
-	ts->ts_rate = AR5K_REG_MS(tx_ctl->tx_control_0,
+	ts->ts_rate[0] = AR5K_REG_MS(tx_ctl->tx_control_0,
 		AR5K_2W_TX_DESC_CTL0_XMIT_RATE);
+	ts->ts_retry[0] = ts->ts_longretry;
+	ts->ts_final_idx = 0;
 
 	if (!(tx_status->tx_status_0 & AR5K_DESC_TX_STATUS0_FRAME_XMIT_OK)) {
 		if (tx_status->tx_status_0 &
@@ -405,29 +416,43 @@ static int ath5k_hw_proc_4word_tx_status(struct ath5k_hw *ah,
 		AR5K_DESC_TX_STATUS1_XMIT_ANTENNA) ? 2 : 1;
 	ts->ts_status = 0;
 
-	switch (AR5K_REG_MS(tx_status->tx_status_1,
-			AR5K_DESC_TX_STATUS1_FINAL_TS_INDEX)) {
-	case 0:
-		ts->ts_rate = tx_ctl->tx_control_3 &
-			AR5K_4W_TX_DESC_CTL3_XMIT_RATE0;
-		break;
+	ts->ts_final_idx = AR5K_REG_MS(tx_status->tx_status_1,
+			AR5K_DESC_TX_STATUS1_FINAL_TS_INDEX);
+
+	/* The longretry counter has the number of un-acked retries
+	 * for the final rate. To get the total number of retries
+	 * we have to add the retry counters for the other rates
+	 * as well
+	 */
+	ts->ts_retry[ts->ts_final_idx] = ts->ts_longretry;
+	switch (ts->ts_final_idx) {
+	case 3:
+		ts->ts_rate[3] = AR5K_REG_MS(tx_ctl->tx_control_3,
+			AR5K_4W_TX_DESC_CTL3_XMIT_RATE3);
+
+		ts->ts_retry[2] = AR5K_REG_MS(tx_ctl->tx_control_2,
+			AR5K_4W_TX_DESC_CTL2_XMIT_TRIES2);
+		ts->ts_longretry += ts->ts_retry[2];
+		/* fall through */
+	case 2:
+		ts->ts_rate[2] = AR5K_REG_MS(tx_ctl->tx_control_3,
+			AR5K_4W_TX_DESC_CTL3_XMIT_RATE2);
+
+		ts->ts_retry[1] = AR5K_REG_MS(tx_ctl->tx_control_2,
+			AR5K_4W_TX_DESC_CTL2_XMIT_TRIES1);
+		ts->ts_longretry += ts->ts_retry[1];
+		/* fall through */
 	case 1:
-		ts->ts_rate = AR5K_REG_MS(tx_ctl->tx_control_3,
+		ts->ts_rate[1] = AR5K_REG_MS(tx_ctl->tx_control_3,
 			AR5K_4W_TX_DESC_CTL3_XMIT_RATE1);
-		ts->ts_longretry += AR5K_REG_MS(tx_ctl->tx_control_2,
+
+		ts->ts_retry[0] = AR5K_REG_MS(tx_ctl->tx_control_2,
 			AR5K_4W_TX_DESC_CTL2_XMIT_TRIES1);
-		break;
-	case 2:
-		ts->ts_rate = AR5K_REG_MS(tx_ctl->tx_control_3,
-			AR5K_4W_TX_DESC_CTL3_XMIT_RATE2);
-		ts->ts_longretry += AR5K_REG_MS(tx_ctl->tx_control_2,
-			AR5K_4W_TX_DESC_CTL2_XMIT_TRIES2);
-		break;
-	case 3:
-		ts->ts_rate = AR5K_REG_MS(tx_ctl->tx_control_3,
-			AR5K_4W_TX_DESC_CTL3_XMIT_RATE3);
-		ts->ts_longretry += AR5K_REG_MS(tx_ctl->tx_control_2,
-			AR5K_4W_TX_DESC_CTL2_XMIT_TRIES3);
+		ts->ts_longretry += ts->ts_retry[0];
+		/* fall through */
+	case 0:
+		ts->ts_rate[0] = tx_ctl->tx_control_3 &
+			AR5K_4W_TX_DESC_CTL3_XMIT_RATE0;
 		break;
 	}
 
@@ -653,7 +678,7 @@ int ath5k_hw_init_desc_functions(struct ath5k_hw *ah)
 	} else {
 		ah->ah_setup_rx_desc = ath5k_hw_setup_rx_desc;
 		ah->ah_setup_tx_desc = ath5k_hw_setup_2word_tx_desc;
-		ah->ah_setup_mrr_tx_desc = ath5k_hw_setup_mrr_tx_desc;
+		ah->ah_setup_mrr_tx_desc = ath5k_hw_setup_no_mrr;
 		ah->ah_proc_tx_desc = ath5k_hw_proc_2word_tx_status;
 	}
 
-- 
cgit v1.2.3


From cccf129f820e431d84690729254a32f1709328fb Mon Sep 17 00:00:00 2001
From: Felix Fietkau <nbd@openwrt.org>
Date: Sun, 5 Oct 2008 18:07:45 +0200
Subject: mac80211: add the 'minstrel' rate control algorithm

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---
 net/mac80211/Kconfig                    |  13 +
 net/mac80211/Makefile                   |   4 +
 net/mac80211/main.c                     |   5 +
 net/mac80211/rate.h                     |  14 +
 net/mac80211/rc80211_minstrel.c         | 583 ++++++++++++++++++++++++++++++++
 net/mac80211/rc80211_minstrel.h         |  85 +++++
 net/mac80211/rc80211_minstrel_debugfs.c | 164 +++++++++
 7 files changed, 868 insertions(+)
 create mode 100644 net/mac80211/rc80211_minstrel.c
 create mode 100644 net/mac80211/rc80211_minstrel.h
 create mode 100644 net/mac80211/rc80211_minstrel_debugfs.c

diff --git a/net/mac80211/Kconfig b/net/mac80211/Kconfig
index 8427518e4f2..7f710a27e91 100644
--- a/net/mac80211/Kconfig
+++ b/net/mac80211/Kconfig
@@ -22,6 +22,11 @@ config MAC80211_RC_PID
 	  mac80211 that uses a PID controller to select the TX
 	  rate.
 
+config MAC80211_RC_MINSTREL
+	bool "Minstrel"
+	---help---
+	  This option enables the 'minstrel' TX rate control algorithm
+
 choice
 	prompt "Default rate control algorithm"
 	default MAC80211_RC_DEFAULT_PID
@@ -39,11 +44,19 @@ config MAC80211_RC_DEFAULT_PID
 	  default rate control algorithm. You should choose
 	  this unless you know what you are doing.
 
+config MAC80211_RC_DEFAULT_MINSTREL
+	bool "Minstrel"
+	depends on MAC80211_RC_MINSTREL
+	---help---
+	  Select Minstrel as the default rate control algorithm.
+
+
 endchoice
 
 config MAC80211_RC_DEFAULT
 	string
 	default "pid" if MAC80211_RC_DEFAULT_PID
+	default "minstrel" if MAC80211_RC_DEFAULT_MINSTREL
 	default ""
 
 endmenu
diff --git a/net/mac80211/Makefile b/net/mac80211/Makefile
index 2dc8f2bff27..31cfd1f89a7 100644
--- a/net/mac80211/Makefile
+++ b/net/mac80211/Makefile
@@ -41,4 +41,8 @@ mac80211-$(CONFIG_MAC80211_MESH) += \
 rc80211_pid-y := rc80211_pid_algo.o
 rc80211_pid-$(CONFIG_MAC80211_DEBUGFS) += rc80211_pid_debugfs.o
 
+rc80211_minstrel-y := rc80211_minstrel.o
+rc80211_minstrel-$(CONFIG_MAC80211_DEBUGFS) += rc80211_minstrel_debugfs.o
+
 mac80211-$(CONFIG_MAC80211_RC_PID) += $(rc80211_pid-y)
+mac80211-$(CONFIG_MAC80211_RC_MINSTREL) += $(rc80211_minstrel-y)
diff --git a/net/mac80211/main.c b/net/mac80211/main.c
index d608c44047c..ae62ad40ad6 100644
--- a/net/mac80211/main.c
+++ b/net/mac80211/main.c
@@ -1015,6 +1015,10 @@ static int __init ieee80211_init(void)
 	BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
 	             IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
 
+	ret = rc80211_minstrel_init();
+	if (ret)
+		return ret;
+
 	ret = rc80211_pid_init();
 	if (ret)
 		return ret;
@@ -1027,6 +1031,7 @@ static int __init ieee80211_init(void)
 static void __exit ieee80211_exit(void)
 {
 	rc80211_pid_exit();
+	rc80211_minstrel_exit();
 
 	/*
 	 * For key todo, it'll be empty by now but the work
diff --git a/net/mac80211/rate.h b/net/mac80211/rate.h
index eb94e584d24..d0092f847f8 100644
--- a/net/mac80211/rate.h
+++ b/net/mac80211/rate.h
@@ -125,4 +125,18 @@ static inline void rc80211_pid_exit(void)
 }
 #endif
 
+#ifdef CONFIG_MAC80211_RC_MINSTREL
+extern int rc80211_minstrel_init(void);
+extern void rc80211_minstrel_exit(void);
+#else
+static inline int rc80211_minstrel_init(void)
+{
+	return 0;
+}
+static inline void rc80211_minstrel_exit(void)
+{
+}
+#endif
+
+
 #endif /* IEEE80211_RATE_H */
diff --git a/net/mac80211/rc80211_minstrel.c b/net/mac80211/rc80211_minstrel.c
new file mode 100644
index 00000000000..f6d69dab07a
--- /dev/null
+++ b/net/mac80211/rc80211_minstrel.c
@@ -0,0 +1,583 @@
+/*
+ * Copyright (C) 2008 Felix Fietkau <nbd@openwrt.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Based on minstrel.c:
+ *   Copyright (C) 2005-2007 Derek Smithies <derek@indranet.co.nz>
+ *   Sponsored by Indranet Technologies Ltd
+ *
+ * Based on sample.c:
+ *   Copyright (c) 2005 John Bicket
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *   1. Redistributions of source code must retain the above copyright
+ *      notice, this list of conditions and the following disclaimer,
+ *      without modification.
+ *   2. Redistributions in binary form must reproduce at minimum a disclaimer
+ *      similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
+ *      redistribution must be conditioned upon including a substantially
+ *      similar Disclaimer requirement for further binary redistribution.
+ *   3. Neither the names of the above-listed copyright holders nor the names
+ *      of any contributors may be used to endorse or promote products derived
+ *      from this software without specific prior written permission.
+ *
+ *   Alternatively, this software may be distributed under the terms of the
+ *   GNU General Public License ("GPL") version 2 as published by the Free
+ *   Software Foundation.
+ *
+ *   NO WARRANTY
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
+ *   AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
+ *   THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
+ *   OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ *   SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ *   INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
+ *   IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ *   ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ *   THE POSSIBILITY OF SUCH DAMAGES.
+ */
+#include <linux/netdevice.h>
+#include <linux/types.h>
+#include <linux/skbuff.h>
+#include <linux/debugfs.h>
+#include <linux/random.h>
+#include <linux/ieee80211.h>
+#include <net/mac80211.h>
+#include "rate.h"
+#include "rc80211_minstrel.h"
+
+#define SAMPLE_COLUMNS	10
+#define SAMPLE_TBL(_mi, _idx, _col) \
+		_mi->sample_table[(_idx * SAMPLE_COLUMNS) + _col]
+
+/* convert mac80211 rate index to local array index */
+static inline int
+rix_to_ndx(struct minstrel_sta_info *mi, int rix)
+{
+	int i = rix;
+	for (i = rix; i >= 0; i--)
+		if (mi->r[i].rix == rix)
+			break;
+	WARN_ON(mi->r[i].rix != rix);
+	return i;
+}
+
+static inline bool
+use_low_rate(struct sk_buff *skb)
+{
+	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
+	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+	u16 fc;
+
+	fc = le16_to_cpu(hdr->frame_control);
+
+	return ((info->flags & IEEE80211_TX_CTL_NO_ACK) ||
+		(fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA ||
+		is_multicast_ether_addr(hdr->addr1));
+}
+
+
+static void
+minstrel_update_stats(struct minstrel_priv *mp, struct minstrel_sta_info *mi)
+{
+	u32 max_tp = 0, index_max_tp = 0, index_max_tp2 = 0;
+	u32 max_prob = 0, index_max_prob = 0;
+	u32 usecs;
+	u32 p;
+	int i;
+
+	mi->stats_update = jiffies;
+	for (i = 0; i < mi->n_rates; i++) {
+		struct minstrel_rate *mr = &mi->r[i];
+
+		usecs = mr->perfect_tx_time;
+		if (!usecs)
+			usecs = 1000000;
+
+		/* To avoid rounding issues, probabilities scale from 0 (0%)
+		 * to 18000 (100%) */
+		if (mr->attempts) {
+			p = (mr->success * 18000) / mr->attempts;
+			mr->succ_hist += mr->success;
+			mr->att_hist += mr->attempts;
+			mr->cur_prob = p;
+			p = ((p * (100 - mp->ewma_level)) + (mr->probability *
+				mp->ewma_level)) / 100;
+			mr->probability = p;
+			mr->cur_tp = p * (1000000 / usecs);
+		}
+
+		mr->last_success = mr->success;
+		mr->last_attempts = mr->attempts;
+		mr->success = 0;
+		mr->attempts = 0;
+
+		/* Sample less often below the 10% chance of success.
+		 * Sample less often above the 95% chance of success. */
+		if ((mr->probability > 17100) || (mr->probability < 1800)) {
+			mr->adjusted_retry_count = mr->retry_count >> 1;
+			if (mr->adjusted_retry_count > 2)
+				mr->adjusted_retry_count = 2;
+		} else {
+			mr->adjusted_retry_count = mr->retry_count;
+		}
+		if (!mr->adjusted_retry_count)
+			mr->adjusted_retry_count = 2;
+	}
+
+	for (i = 0; i < mi->n_rates; i++) {
+		struct minstrel_rate *mr = &mi->r[i];
+		if (max_tp < mr->cur_tp) {
+			index_max_tp = i;
+			max_tp = mr->cur_tp;
+		}
+		if (max_prob < mr->probability) {
+			index_max_prob = i;
+			max_prob = mr->probability;
+		}
+	}
+
+	max_tp = 0;
+	for (i = 0; i < mi->n_rates; i++) {
+		struct minstrel_rate *mr = &mi->r[i];
+
+		if (i == index_max_tp)
+			continue;
+
+		if (max_tp < mr->cur_tp) {
+			index_max_tp2 = i;
+			max_tp = mr->cur_tp;
+		}
+	}
+	mi->max_tp_rate = index_max_tp;
+	mi->max_tp_rate2 = index_max_tp2;
+	mi->max_prob_rate = index_max_prob;
+}
+
+static void
+minstrel_tx_status(void *priv, struct ieee80211_supported_band *sband,
+                   struct ieee80211_sta *sta, void *priv_sta,
+		   struct sk_buff *skb)
+{
+	struct minstrel_sta_info *mi = priv_sta;
+	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+	struct ieee80211_tx_altrate *ar = info->status.retries;
+	struct minstrel_priv *mp = priv;
+	int i, ndx, tries;
+	int success = 0;
+
+	if (!info->status.excessive_retries)
+		success = 1;
+
+	if (!mp->has_mrr || (ar[0].rate_idx < 0)) {
+		ndx = rix_to_ndx(mi, info->tx_rate_idx);
+		tries = info->status.retry_count + 1;
+		mi->r[ndx].success += success;
+		mi->r[ndx].attempts += tries;
+		return;
+	}
+
+	for (i = 0; i < 4; i++) {
+		if (ar[i].rate_idx < 0)
+			break;
+
+		ndx = rix_to_ndx(mi, ar[i].rate_idx);
+		mi->r[ndx].attempts += ar[i].limit + 1;
+
+		if ((i != 3) && (ar[i + 1].rate_idx < 0))
+			mi->r[ndx].success += success;
+	}
+
+	if ((info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE) && (i >= 0))
+		mi->sample_count++;
+
+	if (mi->sample_deferred > 0)
+		mi->sample_deferred--;
+}
+
+
+static inline unsigned int
+minstrel_get_retry_count(struct minstrel_rate *mr,
+                         struct ieee80211_tx_info *info)
+{
+	unsigned int retry = mr->adjusted_retry_count;
+
+	if (info->flags & IEEE80211_TX_CTL_USE_RTS_CTS)
+		retry = max(2U, min(mr->retry_count_rtscts, retry));
+	else if (info->flags & IEEE80211_TX_CTL_USE_CTS_PROTECT)
+		retry = max(2U, min(mr->retry_count_cts, retry));
+	return retry;
+}
+
+
+static int
+minstrel_get_next_sample(struct minstrel_sta_info *mi)
+{
+	unsigned int sample_ndx;
+	sample_ndx = SAMPLE_TBL(mi, mi->sample_idx, mi->sample_column);
+	mi->sample_idx++;
+	if (mi->sample_idx > (mi->n_rates - 2)) {
+		mi->sample_idx = 0;
+		mi->sample_column++;
+		if (mi->sample_column >= SAMPLE_COLUMNS)
+			mi->sample_column = 0;
+	}
+	return sample_ndx;
+}
+
+void
+minstrel_get_rate(void *priv, struct ieee80211_supported_band *sband,
+                  struct ieee80211_sta *sta, void *priv_sta,
+                  struct sk_buff *skb, struct rate_selection *sel)
+{
+	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+	struct minstrel_sta_info *mi = priv_sta;
+	struct minstrel_priv *mp = priv;
+	struct ieee80211_tx_altrate *ar = info->control.retries;
+	unsigned int ndx, sample_ndx = 0;
+	bool mrr;
+	bool sample_slower = false;
+	bool sample = false;
+	int i, delta;
+	int mrr_ndx[3];
+	int sample_rate;
+
+	if (!sta || !mi || use_low_rate(skb)) {
+		sel->rate_idx = rate_lowest_index(sband, sta);
+		return;
+	}
+
+	mrr = mp->has_mrr;
+
+	/* mac80211 does not allow mrr for RTS/CTS */
+	if ((info->flags & IEEE80211_TX_CTL_USE_RTS_CTS) ||
+	    (info->flags & IEEE80211_TX_CTL_USE_CTS_PROTECT))
+		mrr = false;
+
+	if (time_after(jiffies, mi->stats_update + (mp->update_interval *
+			HZ) / 1000))
+		minstrel_update_stats(mp, mi);
+
+	ndx = mi->max_tp_rate;
+
+	if (mrr)
+		sample_rate = mp->lookaround_rate_mrr;
+	else
+		sample_rate = mp->lookaround_rate;
+
+	mi->packet_count++;
+	delta = (mi->packet_count * sample_rate / 100) -
+			(mi->sample_count + mi->sample_deferred / 2);
+
+	/* delta > 0: sampling required */
+	if (delta > 0) {
+		if (mi->packet_count >= 10000) {
+			mi->sample_deferred = 0;
+			mi->sample_count = 0;
+			mi->packet_count = 0;
+		} else if (delta > mi->n_rates * 2) {
+			/* With multi-rate retry, not every planned sample
+			 * attempt actually gets used, due to the way the retry
+			 * chain is set up - [max_tp,sample,prob,lowest] for
+			 * sample_rate < max_tp.
+			 *
+			 * If there's too much sampling backlog and the link
+			 * starts getting worse, minstrel would start bursting
+			 * out lots of sampling frames, which would result
+			 * in a large throughput loss. */
+			mi->sample_count += (delta - mi->n_rates * 2);
+		}
+
+		sample_ndx = minstrel_get_next_sample(mi);
+		sample = true;
+		sample_slower = mrr && (mi->r[sample_ndx].perfect_tx_time >
+			mi->r[ndx].perfect_tx_time);
+
+		if (!sample_slower) {
+			ndx = sample_ndx;
+			mi->sample_count++;
+		} else {
+			/* Only use IEEE80211_TX_CTL_RATE_CTRL_PROBE to mark
+			 * packets that have the sampling rate deferred to the
+			 * second MRR stage. Increase the sample counter only
+			 * if the deferred sample rate was actually used.
+			 * Use the sample_deferred counter to make sure that
+			 * the sampling is not done in large bursts */
+			info->flags |= IEEE80211_TX_CTL_RATE_CTRL_PROBE;
+			mi->sample_deferred++;
+		}
+	}
+	sel->rate_idx = mi->r[ndx].rix;
+	info->control.retry_limit = minstrel_get_retry_count(&mi->r[ndx], info);
+
+	if (!mrr) {
+		ar[0].rate_idx = mi->lowest_rix;
+		ar[0].limit = mp->max_retry;
+		ar[1].rate_idx = -1;
+		return;
+	}
+
+	/* MRR setup */
+	if (sample) {
+		if (sample_slower)
+			mrr_ndx[0] = sample_ndx;
+		else
+			mrr_ndx[0] = mi->max_tp_rate;
+	} else {
+		mrr_ndx[0] = mi->max_tp_rate2;
+	}
+	mrr_ndx[1] = mi->max_prob_rate;
+	mrr_ndx[2] = 0;
+	for (i = 0; i < 3; i++) {
+		ar[i].rate_idx = mi->r[mrr_ndx[i]].rix;
+		ar[i].limit = mi->r[mrr_ndx[i]].adjusted_retry_count;
+	}
+}
+
+
+static void
+calc_rate_durations(struct minstrel_sta_info *mi, struct ieee80211_local *local,
+                    struct minstrel_rate *d, struct ieee80211_rate *rate)
+{
+	int erp = !!(rate->flags & IEEE80211_RATE_ERP_G);
+
+	d->perfect_tx_time = ieee80211_frame_duration(local, 1200,
+			rate->bitrate, erp, 1);
+	d->ack_time = ieee80211_frame_duration(local, 10,
+			rate->bitrate, erp, 1);
+}
+
+static void
+init_sample_table(struct minstrel_sta_info *mi)
+{
+	unsigned int i, col, new_idx;
+	unsigned int n_srates = mi->n_rates - 1;
+	u8 rnd[8];
+
+	mi->sample_column = 0;
+	mi->sample_idx = 0;
+	memset(mi->sample_table, 0, SAMPLE_COLUMNS * mi->n_rates);
+
+	for (col = 0; col < SAMPLE_COLUMNS; col++) {
+		for (i = 0; i < n_srates; i++) {
+			get_random_bytes(rnd, sizeof(rnd));
+			new_idx = (i + rnd[i & 7]) % n_srates;
+
+			while (SAMPLE_TBL(mi, new_idx, col) != 0)
+				new_idx = (new_idx + 1) % n_srates;
+
+			/* Don't sample the slowest rate (i.e. slowest base
+			 * rate). We must presume that the slowest rate works
+			 * fine, or else other management frames will also be
+			 * failing and the link will break */
+			SAMPLE_TBL(mi, new_idx, col) = i + 1;
+		}
+	}
+}
+
+static void
+minstrel_rate_init(void *priv, struct ieee80211_supported_band *sband,
+               struct ieee80211_sta *sta, void *priv_sta)
+{
+	struct minstrel_sta_info *mi = priv_sta;
+	struct minstrel_priv *mp = priv;
+	struct minstrel_rate *mr_ctl;
+	unsigned int i, n = 0;
+	unsigned int t_slot = 9; /* FIXME: get real slot time */
+
+	mi->lowest_rix = rate_lowest_index(sband, sta);
+	mr_ctl = &mi->r[rix_to_ndx(mi, mi->lowest_rix)];
+	mi->sp_ack_dur = mr_ctl->ack_time;
+
+	for (i = 0; i < sband->n_bitrates; i++) {
+		struct minstrel_rate *mr = &mi->r[n];
+		unsigned int tx_time = 0, tx_time_cts = 0, tx_time_rtscts = 0;
+		unsigned int tx_time_single;
+		unsigned int cw = mp->cw_min;
+
+		if (!rate_supported(sta, sband->band, i))
+			continue;
+		n++;
+		memset(mr, 0, sizeof(*mr));
+
+		mr->rix = i;
+		mr->bitrate = sband->bitrates[i].bitrate / 5;
+		calc_rate_durations(mi, hw_to_local(mp->hw), mr,
+				&sband->bitrates[i]);
+
+		/* calculate maximum number of retransmissions before
+		 * fallback (based on maximum segment size) */
+		mr->retry_count = 1;
+		mr->retry_count_cts = 1;
+		mr->retry_count_rtscts = 1;
+		tx_time = mr->perfect_tx_time + mi->sp_ack_dur;
+		do {
+			/* add one retransmission */
+			tx_time_single = mr->ack_time + mr->perfect_tx_time;
+
+			/* contention window */
+			tx_time_single += t_slot + min(cw, mp->cw_max);
+			cw = (cw + 1) << 1;
+
+			tx_time += tx_time_single;
+			tx_time_cts += tx_time_single + mi->sp_ack_dur;
+			tx_time_rtscts += tx_time_single + 2 * mi->sp_ack_dur;
+			if ((tx_time_cts < mp->segment_size) &&
+				(mr->retry_count_cts < mp->max_retry))
+				mr->retry_count_cts++;
+			if ((tx_time_rtscts < mp->segment_size) &&
+				(mr->retry_count_rtscts < mp->max_retry))
+				mr->retry_count_rtscts++;
+		} while ((tx_time < mp->segment_size) &&
+				(++mr->retry_count < mp->max_retry));
+		mr->adjusted_retry_count = mr->retry_count;
+	}
+
+	for (i = n; i < sband->n_bitrates; i++) {
+		struct minstrel_rate *mr = &mi->r[i];
+		mr->rix = -1;
+	}
+
+	mi->n_rates = n;
+	mi->stats_update = jiffies;
+
+	init_sample_table(mi);
+}
+
+static void *
+minstrel_alloc_sta(void *priv, struct ieee80211_sta *sta, gfp_t gfp)
+{
+	struct ieee80211_supported_band *sband;
+	struct minstrel_sta_info *mi;
+	struct minstrel_priv *mp = priv;
+	struct ieee80211_hw *hw = mp->hw;
+	int max_rates = 0;
+	int i;
+
+	mi = kzalloc(sizeof(struct minstrel_sta_info), gfp);
+	if (!mi)
+		return NULL;
+
+	for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
+		sband = hw->wiphy->bands[hw->conf.channel->band];
+		if (sband->n_bitrates > max_rates)
+			max_rates = sband->n_bitrates;
+	}
+
+	mi->r = kzalloc(sizeof(struct minstrel_rate) * max_rates, gfp);
+	if (!mi->r)
+		goto error;
+
+	mi->sample_table = kmalloc(SAMPLE_COLUMNS * max_rates, gfp);
+	if (!mi->sample_table)
+		goto error1;
+
+	mi->stats_update = jiffies;
+	return mi;
+
+error1:
+	kfree(mi->r);
+error:
+	kfree(mi);
+	return NULL;
+}
+
+static void
+minstrel_free_sta(void *priv, struct ieee80211_sta *sta, void *priv_sta)
+{
+	struct minstrel_sta_info *mi = priv_sta;
+
+	kfree(mi->sample_table);
+	kfree(mi->r);
+	kfree(mi);
+}
+
+static void
+minstrel_clear(void *priv)
+{
+}
+
+static void *
+minstrel_alloc(struct ieee80211_hw *hw, struct dentry *debugfsdir)
+{
+	struct minstrel_priv *mp;
+
+	mp = kzalloc(sizeof(struct minstrel_priv), GFP_ATOMIC);
+	if (!mp)
+		return NULL;
+
+	/* contention window settings
+	 * Just an approximation. Using the per-queue values would complicate
+	 * the calculations and is probably unnecessary */
+	mp->cw_min = 15;
+	mp->cw_max = 1023;
+
+	/* number of packets (in %) to use for sampling other rates
+	 * sample less often for non-mrr packets, because the overhead
+	 * is much higher than with mrr */
+	mp->lookaround_rate = 5;
+	mp->lookaround_rate_mrr = 10;
+
+	/* moving average weight for EWMA */
+	mp->ewma_level = 75;
+
+	/* maximum time that the hw is allowed to stay in one MRR segment */
+	mp->segment_size = 6000;
+
+	if (hw->max_altrate_tries > 0)
+		mp->max_retry = hw->max_altrate_tries;
+	else
+		/* safe default, does not necessarily have to match hw properties */
+		mp->max_retry = 7;
+
+	if (hw->max_altrates >= 3)
+		mp->has_mrr = true;
+
+	mp->hw = hw;
+	mp->update_interval = 100;
+
+	return mp;
+}
+
+static void
+minstrel_free(void *priv)
+{
+	kfree(priv);
+}
+
+static struct rate_control_ops mac80211_minstrel = {
+	.name = "minstrel",
+	.tx_status = minstrel_tx_status,
+	.get_rate = minstrel_get_rate,
+	.rate_init = minstrel_rate_init,
+	.clear = minstrel_clear,
+	.alloc = minstrel_alloc,
+	.free = minstrel_free,
+	.alloc_sta = minstrel_alloc_sta,
+	.free_sta = minstrel_free_sta,
+#ifdef CONFIG_MAC80211_DEBUGFS
+	.add_sta_debugfs = minstrel_add_sta_debugfs,
+	.remove_sta_debugfs = minstrel_remove_sta_debugfs,
+#endif
+};
+
+int __init
+rc80211_minstrel_init(void)
+{
+	return ieee80211_rate_control_register(&mac80211_minstrel);
+}
+
+void
+rc80211_minstrel_exit(void)
+{
+	ieee80211_rate_control_unregister(&mac80211_minstrel);
+}
+
diff --git a/net/mac80211/rc80211_minstrel.h b/net/mac80211/rc80211_minstrel.h
new file mode 100644
index 00000000000..9a90a6aee04
--- /dev/null
+++ b/net/mac80211/rc80211_minstrel.h
@@ -0,0 +1,85 @@
+/*
+ * Copyright (C) 2008 Felix Fietkau <nbd@openwrt.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __RC_MINSTREL_H
+#define __RC_MINSTREL_H
+
+struct minstrel_rate {
+	int bitrate;
+	int rix;
+
+	unsigned int perfect_tx_time;
+	unsigned int ack_time;
+
+	unsigned int retry_count;
+	unsigned int retry_count_cts;
+	unsigned int retry_count_rtscts;
+	unsigned int adjusted_retry_count;
+
+	u32 success;
+	u32 attempts;
+	u32 last_attempts;
+	u32 last_success;
+
+	/* parts per thousand */
+	u32 cur_prob;
+	u32 probability;
+
+	/* per-rate throughput */
+	u32 cur_tp;
+	u32 throughput;
+
+	u64 succ_hist;
+	u64 att_hist;
+};
+
+struct minstrel_sta_info {
+	unsigned long stats_update;
+	unsigned int sp_ack_dur;
+	unsigned int rate_avg;
+
+	unsigned int lowest_rix;
+
+	unsigned int max_tp_rate;
+	unsigned int max_tp_rate2;
+	unsigned int max_prob_rate;
+	unsigned int packet_count;
+	unsigned int sample_count;
+	int sample_deferred;
+
+	unsigned int sample_idx;
+	unsigned int sample_column;
+
+	int n_rates;
+	struct minstrel_rate *r;
+
+	/* sampling table */
+	u8 *sample_table;
+
+#ifdef CONFIG_MAC80211_DEBUGFS
+	struct dentry *dbg_stats;
+#endif
+};
+
+struct minstrel_priv {
+	struct ieee80211_hw *hw;
+	bool has_mrr;
+	unsigned int cw_min;
+	unsigned int cw_max;
+	unsigned int max_retry;
+	unsigned int ewma_level;
+	unsigned int segment_size;
+	unsigned int update_interval;
+	unsigned int lookaround_rate;
+	unsigned int lookaround_rate_mrr;
+};
+
+void minstrel_add_sta_debugfs(void *priv, void *priv_sta, struct dentry *dir);
+void minstrel_remove_sta_debugfs(void *priv, void *priv_sta);
+
+#endif
diff --git a/net/mac80211/rc80211_minstrel_debugfs.c b/net/mac80211/rc80211_minstrel_debugfs.c
new file mode 100644
index 00000000000..0b024cd6b80
--- /dev/null
+++ b/net/mac80211/rc80211_minstrel_debugfs.c
@@ -0,0 +1,164 @@
+/*
+ * Copyright (C) 2008 Felix Fietkau <nbd@openwrt.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Based on minstrel.c:
+ *   Copyright (C) 2005-2007 Derek Smithies <derek@indranet.co.nz>
+ *   Sponsored by Indranet Technologies Ltd
+ *
+ * Based on sample.c:
+ *   Copyright (c) 2005 John Bicket
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *   1. Redistributions of source code must retain the above copyright
+ *      notice, this list of conditions and the following disclaimer,
+ *      without modification.
+ *   2. Redistributions in binary form must reproduce at minimum a disclaimer
+ *      similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
+ *      redistribution must be conditioned upon including a substantially
+ *      similar Disclaimer requirement for further binary redistribution.
+ *   3. Neither the names of the above-listed copyright holders nor the names
+ *      of any contributors may be used to endorse or promote products derived
+ *      from this software without specific prior written permission.
+ *
+ *   Alternatively, this software may be distributed under the terms of the
+ *   GNU General Public License ("GPL") version 2 as published by the Free
+ *   Software Foundation.
+ *
+ *   NO WARRANTY
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
+ *   AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
+ *   THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
+ *   OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ *   SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ *   INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
+ *   IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ *   ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ *   THE POSSIBILITY OF SUCH DAMAGES.
+ */
+#include <linux/netdevice.h>
+#include <linux/types.h>
+#include <linux/skbuff.h>
+#include <linux/debugfs.h>
+#include <linux/ieee80211.h>
+#include <net/mac80211.h>
+#include "rc80211_minstrel.h"
+
+struct minstrel_stats_info {
+	struct minstrel_sta_info *mi;
+	char buf[4096];
+	size_t len;
+};
+
+static int
+minstrel_stats_open(struct inode *inode, struct file *file)
+{
+	struct minstrel_sta_info *mi = inode->i_private;
+	struct minstrel_stats_info *ms;
+	unsigned int i, tp, prob, eprob;
+	char *p;
+
+	ms = kmalloc(sizeof(*ms), GFP_KERNEL);
+	if (!ms)
+		return -ENOMEM;
+
+	file->private_data = ms;
+	p = ms->buf;
+	p += sprintf(p, "rate     throughput  ewma prob   this prob  "
+			"this succ/attempt   success    attempts\n");
+	for (i = 0; i < mi->n_rates; i++) {
+		struct minstrel_rate *mr = &mi->r[i];
+
+		*(p++) = (i == mi->max_tp_rate) ? 'T' : ' ';
+		*(p++) = (i == mi->max_tp_rate2) ? 't' : ' ';
+		*(p++) = (i == mi->max_prob_rate) ? 'P' : ' ';
+		p += sprintf(p, "%3u%s", mr->bitrate / 2,
+				(mr->bitrate & 1 ? ".5" : "  "));
+
+		tp = ((mr->cur_tp * 96) / 18000) >> 10;
+		prob = mr->cur_prob / 18;
+		eprob = mr->probability / 18;
+
+		p += sprintf(p, "  %6u.%1u   %6u.%1u   %6u.%1u        "
+				"%3u(%3u)   %8llu    %8llu\n",
+				tp / 10, tp % 10,
+				eprob / 10, eprob % 10,
+				prob / 10, prob % 10,
+				mr->last_success,
+				mr->last_attempts,
+				mr->succ_hist,
+				mr->att_hist);
+	}
+	p += sprintf(p, "\nTotal packet count::    ideal %d      "
+			"lookaround %d\n\n",
+			mi->packet_count - mi->sample_count,
+			mi->sample_count);
+	ms->len = p - ms->buf;
+
+	return 0;
+}
+
+static int
+minstrel_stats_read(struct file *file, char __user *buf, size_t len, loff_t *o)
+{
+	struct minstrel_stats_info *ms;
+	char *src;
+
+	ms = file->private_data;
+	src = ms->buf;
+
+	len = min(len, ms->len);
+	if (len <= *o)
+		return 0;
+
+	src += *o;
+	len -= *o;
+	*o += len;
+
+	if (copy_to_user(buf, src, len))
+		return -EFAULT;
+
+	return len;
+}
+
+static int
+minstrel_stats_release(struct inode *inode, struct file *file)
+{
+	struct minstrel_stats_info *ms = file->private_data;
+
+	kfree(ms);
+
+	return 0;
+}
+
+static struct file_operations minstrel_stat_fops = {
+	.owner = THIS_MODULE,
+	.open = minstrel_stats_open,
+	.read = minstrel_stats_read,
+	.release = minstrel_stats_release,
+};
+
+void
+minstrel_add_sta_debugfs(void *priv, void *priv_sta, struct dentry *dir)
+{
+	struct minstrel_sta_info *mi = priv_sta;
+
+	mi->dbg_stats = debugfs_create_file("rc_stats", S_IRUGO, dir, mi,
+			&minstrel_stat_fops);
+}
+
+void
+minstrel_remove_sta_debugfs(void *priv, void *priv_sta)
+{
+	struct minstrel_sta_info *mi = priv_sta;
+
+	debugfs_remove(mi->dbg_stats);
+}
-- 
cgit v1.2.3


From d588be6bae40f7965f1b681a4dbc3254411787b9 Mon Sep 17 00:00:00 2001
From: Tomas Winkler <tomas.winkler@intel.com>
Date: Mon, 6 Oct 2008 16:05:29 +0800
Subject: iwlwifi: scan correct setting of valid rx_chains

This patch sets rx_chain bitmap correctly according hw configuration.

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---
 drivers/net/wireless/iwlwifi/iwl-scan.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/wireless/iwlwifi/iwl-scan.c b/drivers/net/wireless/iwlwifi/iwl-scan.c
index bf855c35b0c..debdbd94dda 100644
--- a/drivers/net/wireless/iwlwifi/iwl-scan.c
+++ b/drivers/net/wireless/iwlwifi/iwl-scan.c
@@ -703,7 +703,7 @@ static void iwl_bg_request_scan(struct work_struct *data)
 	u16 cmd_len;
 	enum ieee80211_band band;
 	u8 n_probes = 2;
-	u8 rx_chain = 0x7; /* bitmap: ABC chains */
+	u8 rx_chain = priv->hw_params.valid_rx_ant;
 
 	conf = ieee80211_get_hw_conf(priv->hw);
 
-- 
cgit v1.2.3


From 5118303f7cc0520ce2969ea3d890dc05d586ceb2 Mon Sep 17 00:00:00 2001
From: Tomas Winkler <tomas.winkler@intel.com>
Date: Mon, 6 Oct 2008 16:05:30 +0800
Subject: iwlwifi: scan fix comment

This patch moves comment to proper line, it has moved during
code shuffling.

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Zhu Yi <yi.zhu@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---
 drivers/net/wireless/iwlwifi/iwl-scan.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/wireless/iwlwifi/iwl-scan.c b/drivers/net/wireless/iwlwifi/iwl-scan.c
index debdbd94dda..639904a7283 100644
--- a/drivers/net/wireless/iwlwifi/iwl-scan.c
+++ b/drivers/net/wireless/iwlwifi/iwl-scan.c
@@ -843,7 +843,7 @@ static void iwl_bg_request_scan(struct work_struct *data)
 
 		/* Force use of chains B and C (0x6) for scan Rx for 4965
 		 * Avoid A (0x1) because of its off-channel reception on A-band.
-		 * MIMO is not used here, but value is required */
+		 */
 		if ((priv->hw_rev & CSR_HW_REV_TYPE_MSK) == CSR_HW_REV_TYPE_4965)
 			rx_chain = 0x6;
 	} else {
@@ -851,6 +851,7 @@ static void iwl_bg_request_scan(struct work_struct *data)
 		goto done;
 	}
 
+	/* MIMO is not used here, but value is required */
 	scan->rx_chain = RXON_RX_CHAIN_DRIVER_FORCE_MSK |
 				cpu_to_le16((0x7 << RXON_RX_CHAIN_VALID_POS) |
 				(rx_chain << RXON_RX_CHAIN_FORCE_SEL_POS) |
-- 
cgit v1.2.3


From eedda3670ea8e6d7649e3c8847759b0a6e532f8d Mon Sep 17 00:00:00 2001
From: Tomas Winkler <tomas.winkler@intel.com>
Date: Mon, 6 Oct 2008 16:05:32 +0800
Subject: iwlwifi: remove STATUS_CONF_PENDING in scanning

This patch removes STATUS_CONF_PENDING usage that called from
iwl4965_mac_config internally after scan completed.

It's called anyway from the mac80211 ieee80211_scan_completed():

	if (local->hw_scanning) {
		local->hw_scanning = false;
		if (ieee80211_hw_config(local))
		...
	}

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Zhu Yi <yi.zhu@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---
 drivers/net/wireless/iwlwifi/iwl-agn.c  | 28 ----------------------------
 drivers/net/wireless/iwlwifi/iwl-core.h |  3 +--
 drivers/net/wireless/iwlwifi/iwl-scan.c | 23 +++++++++++++++++++++--
 3 files changed, 22 insertions(+), 32 deletions(-)

diff --git a/drivers/net/wireless/iwlwifi/iwl-agn.c b/drivers/net/wireless/iwlwifi/iwl-agn.c
index 204abab7644..24a1aeb6448 100644
--- a/drivers/net/wireless/iwlwifi/iwl-agn.c
+++ b/drivers/net/wireless/iwlwifi/iwl-agn.c
@@ -2569,30 +2569,6 @@ static void iwl4965_post_associate(struct iwl_priv *priv)
 
 }
 
-static int iwl4965_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf);
-
-static void iwl_bg_scan_completed(struct work_struct *work)
-{
-	struct iwl_priv *priv =
-	    container_of(work, struct iwl_priv, scan_completed);
-
-	IWL_DEBUG_SCAN("SCAN complete scan\n");
-
-	if (test_bit(STATUS_EXIT_PENDING, &priv->status))
-		return;
-
-	if (test_bit(STATUS_CONF_PENDING, &priv->status))
-		iwl4965_mac_config(priv->hw, ieee80211_get_hw_conf(priv->hw));
-
-	ieee80211_scan_completed(priv->hw);
-
-	/* Since setting the TXPOWER may have been deferred while
-	 * performing the scan, fire one off */
-	mutex_lock(&priv->mutex);
-	iwl_set_tx_power(priv, priv->tx_power_user_lmt, true);
-	mutex_unlock(&priv->mutex);
-}
-
 /*****************************************************************************
  *
  * mac80211 entry point functions
@@ -2812,7 +2788,6 @@ static int iwl4965_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *co
 	if (unlikely(!priv->cfg->mod_params->disable_hw_scan &&
 		     test_bit(STATUS_SCANNING, &priv->status))) {
 		IWL_DEBUG_MAC80211("leave - scanning\n");
-		set_bit(STATUS_CONF_PENDING, &priv->status);
 		mutex_unlock(&priv->mutex);
 		return 0;
 	}
@@ -2898,7 +2873,6 @@ static int iwl4965_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *co
 	IWL_DEBUG_MAC80211("leave\n");
 
 out:
-	clear_bit(STATUS_CONF_PENDING, &priv->status);
 	mutex_unlock(&priv->mutex);
 	return ret;
 }
@@ -4117,8 +4091,6 @@ static void iwl_setup_deferred_work(struct iwl_priv *priv)
 	INIT_DELAYED_WORK(&priv->init_alive_start, iwl_bg_init_alive_start);
 	INIT_DELAYED_WORK(&priv->alive_start, iwl_bg_alive_start);
 
-	/* FIXME : remove when resolved PENDING */
-	INIT_WORK(&priv->scan_completed, iwl_bg_scan_completed);
 	iwl_setup_scan_deferred_work(priv);
 	iwl_setup_power_deferred_work(priv);
 
diff --git a/drivers/net/wireless/iwlwifi/iwl-core.h b/drivers/net/wireless/iwlwifi/iwl-core.h
index 55a4b584ce0..288b6a800e0 100644
--- a/drivers/net/wireless/iwlwifi/iwl-core.h
+++ b/drivers/net/wireless/iwlwifi/iwl-core.h
@@ -333,8 +333,7 @@ void iwl_dump_nic_event_log(struct iwl_priv *priv);
 #define STATUS_SCAN_HW		15
 #define STATUS_POWER_PMI	16
 #define STATUS_FW_ERROR		17
-#define STATUS_CONF_PENDING	18
-#define STATUS_MODE_PENDING	19
+#define STATUS_MODE_PENDING	18
 
 
 static inline int iwl_is_ready(struct iwl_priv *priv)
diff --git a/drivers/net/wireless/iwlwifi/iwl-scan.c b/drivers/net/wireless/iwlwifi/iwl-scan.c
index 639904a7283..3b0bee331a3 100644
--- a/drivers/net/wireless/iwlwifi/iwl-scan.c
+++ b/drivers/net/wireless/iwlwifi/iwl-scan.c
@@ -916,10 +916,29 @@ static void iwl_bg_abort_scan(struct work_struct *work)
 	mutex_unlock(&priv->mutex);
 }
 
+static void iwl_bg_scan_completed(struct work_struct *work)
+{
+	struct iwl_priv *priv =
+	    container_of(work, struct iwl_priv, scan_completed);
+
+	IWL_DEBUG_SCAN("SCAN complete scan\n");
+
+	if (test_bit(STATUS_EXIT_PENDING, &priv->status))
+		return;
+
+	ieee80211_scan_completed(priv->hw);
+
+	/* Since setting the TXPOWER may have been deferred while
+	 * performing the scan, fire one off */
+	mutex_lock(&priv->mutex);
+	iwl_set_tx_power(priv, priv->tx_power_user_lmt, true);
+	mutex_unlock(&priv->mutex);
+}
+
+
 void iwl_setup_scan_deferred_work(struct iwl_priv *priv)
 {
-	/*  FIXME: move here when resolved PENDING
-	 *  INIT_WORK(&priv->scan_completed, iwl_bg_scan_completed); */
+	INIT_WORK(&priv->scan_completed, iwl_bg_scan_completed);
 	INIT_WORK(&priv->request_scan, iwl_bg_request_scan);
 	INIT_WORK(&priv->abort_scan, iwl_bg_abort_scan);
 	INIT_DELAYED_WORK(&priv->scan_check, iwl_bg_scan_check);
-- 
cgit v1.2.3


From ad788b5e079484aa1d48aa90a3ebd7d954d2e7db Mon Sep 17 00:00:00 2001
From: "John W. Linville" <linville@tuxdriver.com>
Date: Wed, 1 Oct 2008 15:45:02 -0400
Subject: mac80211: avoid "Wireless Event too big" message for assoc response

The association response IEs are sent to userland with an IWEVCUSTOM
event, which unfortunately is limited to a little more than 100 bytes
of IE information with the encoding used.  Many APs send so much
IE information that this message overflows.  When the IWEVCUSTOM
event is too large, the kernel doesn't send it to userland anyway --
better just not to send it.

An attempt was made by Jouni Malinen to correct this issue by
converting to use IWEVASSOCREQIE and IWEVASSOCRESPIE messages instead
("mac80211: Use IWEVASSOCREQIE instead of IWEVCUSTOM").  Unfortunately,
that caused a problem due to 32-/64-bit interactions on some systems and
was reverted after the 'userland ABI' rule was invoked.  That leaves
us with this option instead of a proper fix, at least until we move
to a cfg80211-based solution.

Signed-off-by: John W. Linville <linville@tuxdriver.com>
---
 net/mac80211/mlme.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index edc339d649c..49f86fa56bf 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -690,9 +690,11 @@ static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data *sdata,
 		}
 	}
 
-	memset(&wrqu, 0, sizeof(wrqu));
-	wrqu.data.length = len;
-	wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
+	if (len <= IW_CUSTOM_MAX) {
+		memset(&wrqu, 0, sizeof(wrqu));
+		wrqu.data.length = len;
+		wireless_send_event(sdata->dev, IWEVCUSTOM, &wrqu, buf);
+	}
 
 	kfree(buf);
 }
-- 
cgit v1.2.3