openwrt-xburst/package/mac80211/patches/310-pending_work.patch

--- a/drivers/net/wireless/ath/ath9k/ar9003_eeprom.c
+++ b/drivers/net/wireless/ath/ath9k/ar9003_eeprom.c
@@ -3271,6 +3271,18 @@ static bool ar9300_check_eeprom_header(s
 	return ar9300_check_header(header);
 }
 
+static int ar9300_eeprom_restore_flash(struct ath_hw *ah, u8 *mptr,
+				       int mdata_size)
+{
+	struct ath_common *common = ath9k_hw_common(ah);
+	u16 *data = (u16 *) mptr;
+	int i;
+
+	for (i = 0; i < mdata_size / 2; i++, data++)
+		ath9k_hw_nvram_read(common, i, data);
+
+	return 0;
+}
 /*
  * Read the configuration data from the eeprom.
  * The data can be put in any specified memory buffer.
@@ -3293,6 +3305,9 @@ static int ar9300_eeprom_restore_interna
 	struct ath_common *common = ath9k_hw_common(ah);
 	eeprom_read_op read;
 
+	if (ath9k_hw_use_flash(ah))
+		return ar9300_eeprom_restore_flash(ah, mptr, mdata_size);
+
 	word = kzalloc(2048, GFP_KERNEL);
 	if (!word)
 		return -1;
--- a/drivers/net/wireless/ath/ath9k/hw.c
+++ b/drivers/net/wireless/ath/ath9k/hw.c
@@ -419,10 +419,6 @@ static void ath9k_hw_init_defaults(struc
 	ah->hw_version.magic = AR5416_MAGIC;
 	ah->hw_version.subvendorid = 0;
 
-	ah->ah_flags = 0;
-	if (!AR_SREV_9100(ah))
-		ah->ah_flags = AH_USE_EEPROM;
-
 	ah->atim_window = 0;
 	ah->sta_id1_defaults =
 		AR_STA_ID1_CRPT_MIC_ENABLE |
--- a/drivers/net/wireless/ath/ath9k/init.c
+++ b/drivers/net/wireless/ath/ath9k/init.c
@@ -533,6 +533,9 @@ static int ath9k_init_softc(u16 devid, s
 	ah->hw_version.subsysid = subsysid;
 	sc->sc_ah = ah;
 
+	if (!sc->dev->platform_data)
+		ah->ah_flags |= AH_USE_EEPROM;
+
 	common = ath9k_hw_common(ah);
 	common->ops = &ath9k_common_ops;
 	common->bus_ops = bus_ops;
--- a/drivers/net/wireless/ath/ath9k/pci.c
+++ b/drivers/net/wireless/ath/ath9k/pci.c
@@ -16,6 +16,7 @@
 
 #include <linux/nl80211.h>
 #include <linux/pci.h>
+#include <linux/ath9k_platform.h>
 #include "ath9k.h"
 
 static DEFINE_PCI_DEVICE_TABLE(ath_pci_id_table) = {
@@ -53,21 +54,36 @@ static void ath_pci_read_cachesize(struc
 
 static bool ath_pci_eeprom_read(struct ath_common *common, u32 off, u16 *data)
 {
-	struct ath_hw *ah = (struct ath_hw *) common->ah;
+	struct ath_softc *sc = (struct ath_softc *) common->priv;
+	struct ath9k_platform_data *pdata = sc->dev->platform_data;
 
-	common->ops->read(ah, AR5416_EEPROM_OFFSET + (off << AR5416_EEPROM_S));
+	if (pdata) {
+		if (off >= (ARRAY_SIZE(pdata->eeprom_data))) {
+			ath_print(common, ATH_DBG_FATAL,
+				  "%s: eeprom read failed, offset %08x "
+				  "is out of range\n",
+				  __func__, off);
+		}
+
+		*data = pdata->eeprom_data[off];
+	} else {
+		struct ath_hw *ah = (struct ath_hw *) common->ah;
+
+		common->ops->read(ah, AR5416_EEPROM_OFFSET +
+				      (off << AR5416_EEPROM_S));
+
+		if (!ath9k_hw_wait(ah,
+				   AR_EEPROM_STATUS_DATA,
+				   AR_EEPROM_STATUS_DATA_BUSY |
+				   AR_EEPROM_STATUS_DATA_PROT_ACCESS, 0,
+				   AH_WAIT_TIMEOUT)) {
+			return false;
+		}
 
-	if (!ath9k_hw_wait(ah,
-			   AR_EEPROM_STATUS_DATA,
-			   AR_EEPROM_STATUS_DATA_BUSY |
-			   AR_EEPROM_STATUS_DATA_PROT_ACCESS, 0,
-			   AH_WAIT_TIMEOUT)) {
-		return false;
+		*data = MS(common->ops->read(ah, AR_EEPROM_STATUS_DATA),
+			   AR_EEPROM_STATUS_DATA_VAL);
 	}
 
-	*data = MS(common->ops->read(ah, AR_EEPROM_STATUS_DATA),
-		   AR_EEPROM_STATUS_DATA_VAL);
-
 	return true;
 }
 
--- a/include/net/regulatory.h
+++ b/include/net/regulatory.h
@@ -43,6 +43,12 @@ enum environment_cap {
  * @intersect: indicates whether the wireless core should intersect
  * 	the requested regulatory domain with the presently set regulatory
  * 	domain.
+ * @processed: indicates whether or not this requests has already been
+ *	processed. When the last request is processed it means that the
+ *	currently regulatory domain set on cfg80211 is updated from
+ *	CRDA and can be used by other regulatory requests. When a
+ *	the last request is not yet processed we must yield until it
+ *	is processed before processing any new requests.
  * @country_ie_checksum: checksum of the last processed and accepted
  * 	country IE
  * @country_ie_env: lets us know if the AP is telling us we are outdoor,
@@ -54,6 +60,7 @@ struct regulatory_request {
 	enum nl80211_reg_initiator initiator;
 	char alpha2[2];
 	bool intersect;
+	bool processed;
 	enum environment_cap country_ie_env;
 	struct list_head list;
 };
--- a/net/wireless/reg.c
+++ b/net/wireless/reg.c
@@ -96,6 +96,9 @@ struct reg_beacon {
 	struct ieee80211_channel chan;
 };
 
+static void reg_todo(struct work_struct *work);
+static DECLARE_WORK(reg_work, reg_todo);
+
 /* We keep a static world regulatory domain in case of the absence of CRDA */
 static const struct ieee80211_regdomain world_regdom = {
 	.n_reg_rules = 5,
@@ -1317,6 +1320,21 @@ static int ignore_request(struct wiphy *
 	return -EINVAL;
 }
 
+static void reg_set_request_processed(void)
+{
+	bool need_more_processing = false;
+
+	last_request->processed = true;
+
+	spin_lock(&reg_requests_lock);
+	if (!list_empty(&reg_requests_list))
+		need_more_processing = true;
+	spin_unlock(&reg_requests_lock);
+
+	if (need_more_processing)
+		schedule_work(&reg_work);
+}
+
 /**
  * __regulatory_hint - hint to the wireless core a regulatory domain
  * @wiphy: if the hint comes from country information from an AP, this
@@ -1392,8 +1410,10 @@ new_request:
 		 * have applied the requested regulatory domain before we just
 		 * inform userspace we have processed the request
 		 */
-		if (r == -EALREADY)
+		if (r == -EALREADY) {
 			nl80211_send_reg_change_event(last_request);
+			reg_set_request_processed();
+		}
 		return r;
 	}
 
@@ -1409,16 +1429,13 @@ static void reg_process_hint(struct regu
 
 	BUG_ON(!reg_request->alpha2);
 
-	mutex_lock(&cfg80211_mutex);
-	mutex_lock(&reg_mutex);
-
 	if (wiphy_idx_valid(reg_request->wiphy_idx))
 		wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx);
 
 	if (reg_request->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
 	    !wiphy) {
 		kfree(reg_request);
-		goto out;
+		return;
 	}
 
 	r = __regulatory_hint(wiphy, reg_request);
@@ -1426,28 +1443,46 @@ static void reg_process_hint(struct regu
 	if (r == -EALREADY && wiphy &&
 	    wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY)
 		wiphy_update_regulatory(wiphy, initiator);
-out:
-	mutex_unlock(&reg_mutex);
-	mutex_unlock(&cfg80211_mutex);
 }
 
-/* Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_* */
+/*
+ * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_*
+ * Regulatory hints come on a first come first serve basis and we
+ * must process each one atomically.
+ */
 static void reg_process_pending_hints(void)
-	{
+{
 	struct regulatory_request *reg_request;
 
+	mutex_lock(&cfg80211_mutex);
+	mutex_lock(&reg_mutex);
+
+	/* When last_request->processed becomes true this will be rescheduled */
+	if (last_request && !last_request->processed) {
+		REG_DBG_PRINT("Pending regulatory request, waiting "
+			      "for it to be processed...");
+		goto out;
+	}
+
 	spin_lock(&reg_requests_lock);
-	while (!list_empty(&reg_requests_list)) {
-		reg_request = list_first_entry(&reg_requests_list,
-					       struct regulatory_request,
-					       list);
-		list_del_init(&reg_request->list);
 
+	if (list_empty(&reg_requests_list)) {
 		spin_unlock(&reg_requests_lock);
-		reg_process_hint(reg_request);
-		spin_lock(&reg_requests_lock);
+		goto out;
 	}
+
+	reg_request = list_first_entry(&reg_requests_list,
+				       struct regulatory_request,
+				       list);
+	list_del_init(&reg_request->list);
+
 	spin_unlock(&reg_requests_lock);
+
+	reg_process_hint(reg_request);
+
+out:
+	mutex_unlock(&reg_mutex);
+	mutex_unlock(&cfg80211_mutex);
 }
 
 /* Processes beacon hints -- this has nothing to do with country IEs */
@@ -1494,8 +1529,6 @@ static void reg_todo(struct work_struct 
 	reg_process_pending_beacon_hints();
 }
 
-static DECLARE_WORK(reg_work, reg_todo);
-
 static void queue_regulatory_request(struct regulatory_request *request)
 {
 	if (isalpha(request->alpha2[0]))
@@ -1530,12 +1563,7 @@ static int regulatory_hint_core(const ch
 	request->alpha2[1] = alpha2[1];
 	request->initiator = NL80211_REGDOM_SET_BY_CORE;
 
-	/*
-	 * This ensures last_request is populated once modules
-	 * come swinging in and calling regulatory hints and
-	 * wiphy_apply_custom_regulatory().
-	 */
-	reg_process_hint(request);
+	queue_regulatory_request(request);
 
 	return 0;
 }
@@ -2061,6 +2089,8 @@ int set_regdom(const struct ieee80211_re
 
 	nl80211_send_reg_change_event(last_request);
 
+	reg_set_request_processed();
+
 	mutex_unlock(&reg_mutex);
 
 	return r;