7 files changed, 258 insertions, 190 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-3945.c b/drivers/net/wireless/iwlwifi/iwl-3945.c
index 068f7f8435c5..c44a303e62ed 100644
--- a/drivers/net/wireless/iwlwifi/iwl-3945.c
+++ b/drivers/net/wireless/iwlwifi/iwl-3945.c
@@ -2852,6 +2852,7 @@ static struct iwl_lib_ops iwl3945_lib = {
 	.isr = iwl_isr_legacy,
 	.config_ap = iwl3945_config_ap,
 	.manage_ibss_station = iwl3945_manage_ibss_station,
+	.recover_from_tx_stall = iwl_bg_monitor_recover,
 	.check_plcp_health = iwl3945_good_plcp_health,
 
 	.debugfs_ops = {
diff --git a/drivers/net/wireless/iwlwifi/iwl-agn-lib.c b/drivers/net/wireless/iwlwifi/iwl-agn-lib.c
index 1004cfc403b1..0f292a210ed9 100644
--- a/drivers/net/wireless/iwlwifi/iwl-agn-lib.c
+++ b/drivers/net/wireless/iwlwifi/iwl-agn-lib.c
@@ -1119,10 +1119,9 @@ static int iwl_get_single_channel_for_scan(struct iwl_priv *priv,
 					   struct iwl_scan_channel *scan_ch)
 {
 	const struct ieee80211_supported_band *sband;
-	const struct iwl_channel_info *ch_info;
 	u16 passive_dwell = 0;
 	u16 active_dwell = 0;
-	int i, added = 0;
+	int added = 0;
 	u16 channel = 0;
 
 	sband = iwl_get_hw_mode(priv, band);
@@ -1137,32 +1136,7 @@ static int iwl_get_single_channel_for_scan(struct iwl_priv *priv,
 	if (passive_dwell <= active_dwell)
 		passive_dwell = active_dwell + 1;
 
-	/* only scan single channel, good enough to reset the RF */
-	/* pick the first valid not in-use channel */
-	if (band == IEEE80211_BAND_5GHZ) {
-		for (i = 14; i < priv->channel_count; i++) {
-			if (priv->channel_info[i].channel !=
-			    le16_to_cpu(priv->staging_rxon.channel)) {
-				channel = priv->channel_info[i].channel;
-				ch_info = iwl_get_channel_info(priv,
-					band, channel);
-				if (is_channel_valid(ch_info))
-					break;
-			}
-		}
-	} else {
-		for (i = 0; i < 14; i++) {
-			if (priv->channel_info[i].channel !=
-			    le16_to_cpu(priv->staging_rxon.channel)) {
-					channel =
-						priv->channel_info[i].channel;
-					ch_info = iwl_get_channel_info(priv,
-						band, channel);
-					if (is_channel_valid(ch_info))
-						break;
-			}
-		}
-	}
+	channel = iwl_get_single_channel_number(priv, band);
 	if (channel) {
 		scan_ch->channel = cpu_to_le16(channel);
 		scan_ch->type = SCAN_CHANNEL_TYPE_PASSIVE;
diff --git a/drivers/net/wireless/iwlwifi/iwl-agn-tx.c b/drivers/net/wireless/iwlwifi/iwl-agn-tx.c
index c402bfc83f36..a732f1094e5d 100644
--- a/drivers/net/wireless/iwlwifi/iwl-agn-tx.c
+++ b/drivers/net/wireless/iwlwifi/iwl-agn-tx.c
@@ -1125,6 +1125,7 @@ static void iwlagn_tx_status(struct iwl_priv *priv, struct sk_buff *skb)
 	struct ieee80211_sta *sta;
 	struct iwl_station_priv *sta_priv;
 
+	rcu_read_lock();
 	sta = ieee80211_find_sta(priv->vif, hdr->addr1);
 	if (sta) {
 		sta_priv = (void *)sta->drv_priv;
@@ -1133,6 +1134,7 @@ static void iwlagn_tx_status(struct iwl_priv *priv, struct sk_buff *skb)
 		    atomic_dec_return(&sta_priv->pending_frames) == 0)
 			ieee80211_sta_block_awake(priv->hw, sta, false);
 	}
+	rcu_read_unlock();
 
 	ieee80211_tx_status_irqsafe(priv->hw, skb);
 }
diff --git a/drivers/net/wireless/iwlwifi/iwl-agn.c b/drivers/net/wireless/iwlwifi/iwl-agn.c
index aef4f71f1981..7726e67044c0 100644
--- a/drivers/net/wireless/iwlwifi/iwl-agn.c
+++ b/drivers/net/wireless/iwlwifi/iwl-agn.c
@@ -1484,6 +1484,156 @@ bool iwl_good_ack_health(struct iwl_priv *priv,
 }
 
 
+/*****************************************************************************
+ *
+ * sysfs attributes
+ *
+ *****************************************************************************/
+
+#ifdef CONFIG_IWLWIFI_DEBUG
+
+/*
+ * The following adds a new attribute to the sysfs representation
+ * of this device driver (i.e. a new file in /sys/class/net/wlan0/device/)
+ * used for controlling the debug level.
+ *
+ * See the level definitions in iwl for details.
+ *
+ * The debug_level being managed using sysfs below is a per device debug
+ * level that is used instead of the global debug level if it (the per
+ * device debug level) is set.
+ */
+static ssize_t show_debug_level(struct device *d,
+				struct device_attribute *attr, char *buf)
+{
+	struct iwl_priv *priv = dev_get_drvdata(d);
+	return sprintf(buf, "0x%08X\n", iwl_get_debug_level(priv));
+}
+static ssize_t store_debug_level(struct device *d,
+				struct device_attribute *attr,
+				 const char *buf, size_t count)
+{
+	struct iwl_priv *priv = dev_get_drvdata(d);
+	unsigned long val;
+	int ret;
+
+	ret = strict_strtoul(buf, 0, &val);
+	if (ret)
+		IWL_ERR(priv, "%s is not in hex or decimal form.\n", buf);
+	else {
+		priv->debug_level = val;
+		if (iwl_alloc_traffic_mem(priv))
+			IWL_ERR(priv,
+				"Not enough memory to generate traffic log\n");
+	}
+	return strnlen(buf, count);
+}
+
+static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
+			show_debug_level, store_debug_level);
+
+
+#endif /* CONFIG_IWLWIFI_DEBUG */
+
+
+static ssize_t show_temperature(struct device *d,
+				struct device_attribute *attr, char *buf)
+{
+	struct iwl_priv *priv = dev_get_drvdata(d);
+
+	if (!iwl_is_alive(priv))
+		return -EAGAIN;
+
+	return sprintf(buf, "%d\n", priv->temperature);
+}
+
+static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
+
+static ssize_t show_tx_power(struct device *d,
+			     struct device_attribute *attr, char *buf)
+{
+	struct iwl_priv *priv = dev_get_drvdata(d);
+
+	if (!iwl_is_ready_rf(priv))
+		return sprintf(buf, "off\n");
+	else
+		return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
+}
+
+static ssize_t store_tx_power(struct device *d,
+			      struct device_attribute *attr,
+			      const char *buf, size_t count)
+{
+	struct iwl_priv *priv = dev_get_drvdata(d);
+	unsigned long val;
+	int ret;
+
+	ret = strict_strtoul(buf, 10, &val);
+	if (ret)
+		IWL_INFO(priv, "%s is not in decimal form.\n", buf);
+	else {
+		ret = iwl_set_tx_power(priv, val, false);
+		if (ret)
+			IWL_ERR(priv, "failed setting tx power (0x%d).\n",
+				ret);
+		else
+			ret = count;
+	}
+	return ret;
+}
+
+static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
+
+static ssize_t show_rts_ht_protection(struct device *d,
+			     struct device_attribute *attr, char *buf)
+{
+	struct iwl_priv *priv = dev_get_drvdata(d);
+
+	return sprintf(buf, "%s\n",
+		priv->cfg->use_rts_for_ht ? "RTS/CTS" : "CTS-to-self");
+}
+
+static ssize_t store_rts_ht_protection(struct device *d,
+			      struct device_attribute *attr,
+			      const char *buf, size_t count)
+{
+	struct iwl_priv *priv = dev_get_drvdata(d);
+	unsigned long val;
+	int ret;
+
+	ret = strict_strtoul(buf, 10, &val);
+	if (ret)
+		IWL_INFO(priv, "Input is not in decimal form.\n");
+	else {
+		if (!iwl_is_associated(priv))
+			priv->cfg->use_rts_for_ht = val ? true : false;
+		else
+			IWL_ERR(priv, "Sta associated with AP - "
+				"Change protection mechanism is not allowed\n");
+		ret = count;
+	}
+	return ret;
+}
+
+static DEVICE_ATTR(rts_ht_protection, S_IWUSR | S_IRUGO,
+			show_rts_ht_protection, store_rts_ht_protection);
+
+
+static struct attribute *iwl_sysfs_entries[] = {
+	&dev_attr_temperature.attr,
+	&dev_attr_tx_power.attr,
+	&dev_attr_rts_ht_protection.attr,
+#ifdef CONFIG_IWLWIFI_DEBUG
+	&dev_attr_debug_level.attr,
+#endif
+	NULL
+};
+
+static struct attribute_group iwl_attribute_group = {
+	.name = NULL,		/* put in device directory */
+	.attrs = iwl_sysfs_entries,
+};
+
 /******************************************************************************
  *
  * uCode download functions
@@ -1965,6 +2115,13 @@ static void iwl_ucode_callback(const struct firmware *ucode_raw, void *context)
 	if (err)
 		IWL_ERR(priv, "failed to create debugfs files. Ignoring error: %d\n", err);
 
+	err = sysfs_create_group(&priv->pci_dev->dev.kobj,
+					&iwl_attribute_group);
+	if (err) {
+		IWL_ERR(priv, "failed to create sysfs device attributes\n");
+		goto out_unbind;
+	}
+
 	/* We have our copies now, allow OS release its copies */
 	release_firmware(ucode_raw);
 	complete(&priv->_agn.firmware_loading_complete);
@@ -3264,141 +3421,6 @@ static int iwlagn_mac_sta_add(struct ieee80211_hw *hw,
 
 /*****************************************************************************
  *
- * sysfs attributes
- *
- *****************************************************************************/
-
-#ifdef CONFIG_IWLWIFI_DEBUG
-
-/*
- * The following adds a new attribute to the sysfs representation
- * of this device driver (i.e. a new file in /sys/class/net/wlan0/device/)
- * used for controlling the debug level.
- *
- * See the level definitions in iwl for details.
- *
- * The debug_level being managed using sysfs below is a per device debug
- * level that is used instead of the global debug level if it (the per
- * device debug level) is set.
- */
-static ssize_t show_debug_level(struct device *d,
-				struct device_attribute *attr, char *buf)
-{
-	struct iwl_priv *priv = dev_get_drvdata(d);
-	return sprintf(buf, "0x%08X\n", iwl_get_debug_level(priv));
-}
-static ssize_t store_debug_level(struct device *d,
-				struct device_attribute *attr,
-				 const char *buf, size_t count)
-{
-	struct iwl_priv *priv = dev_get_drvdata(d);
-	unsigned long val;
-	int ret;
-
-	ret = strict_strtoul(buf, 0, &val);
-	if (ret)
-		IWL_ERR(priv, "%s is not in hex or decimal form.\n", buf);
-	else {
-		priv->debug_level = val;
-		if (iwl_alloc_traffic_mem(priv))
-			IWL_ERR(priv,
-				"Not enough memory to generate traffic log\n");
-	}
-	return strnlen(buf, count);
-}
-
-static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
-			show_debug_level, store_debug_level);
-
-
-#endif /* CONFIG_IWLWIFI_DEBUG */
-
-
-static ssize_t show_temperature(struct device *d,
-				struct device_attribute *attr, char *buf)
-{
-	struct iwl_priv *priv = dev_get_drvdata(d);
-
-	if (!iwl_is_alive(priv))
-		return -EAGAIN;
-
-	return sprintf(buf, "%d\n", priv->temperature);
-}
-
-static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
-
-static ssize_t show_tx_power(struct device *d,
-			     struct device_attribute *attr, char *buf)
-{
-	struct iwl_priv *priv = dev_get_drvdata(d);
-
-	if (!iwl_is_ready_rf(priv))
-		return sprintf(buf, "off\n");
-	else
-		return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
-}
-
-static ssize_t store_tx_power(struct device *d,
-			      struct device_attribute *attr,
-			      const char *buf, size_t count)
-{
-	struct iwl_priv *priv = dev_get_drvdata(d);
-	unsigned long val;
-	int ret;
-
-	ret = strict_strtoul(buf, 10, &val);
-	if (ret)
-		IWL_INFO(priv, "%s is not in decimal form.\n", buf);
-	else {
-		ret = iwl_set_tx_power(priv, val, false);
-		if (ret)
-			IWL_ERR(priv, "failed setting tx power (0x%d).\n",
-				ret);
-		else
-			ret = count;
-	}
-	return ret;
-}
-
-static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
-
-static ssize_t show_rts_ht_protection(struct device *d,
-			     struct device_attribute *attr, char *buf)
-{
-	struct iwl_priv *priv = dev_get_drvdata(d);
-
-	return sprintf(buf, "%s\n",
-		priv->cfg->use_rts_for_ht ? "RTS/CTS" : "CTS-to-self");
-}
-
-static ssize_t store_rts_ht_protection(struct device *d,
-			      struct device_attribute *attr,
-			      const char *buf, size_t count)
-{
-	struct iwl_priv *priv = dev_get_drvdata(d);
-	unsigned long val;
-	int ret;
-
-	ret = strict_strtoul(buf, 10, &val);
-	if (ret)
-		IWL_INFO(priv, "Input is not in decimal form.\n");
-	else {
-		if (!iwl_is_associated(priv))
-			priv->cfg->use_rts_for_ht = val ? true : false;
-		else
-			IWL_ERR(priv, "Sta associated with AP - "
-				"Change protection mechanism is not allowed\n");
-		ret = count;
-	}
-	return ret;
-}
-
-static DEVICE_ATTR(rts_ht_protection, S_IWUSR | S_IRUGO,
-			show_rts_ht_protection, store_rts_ht_protection);
-
-
-/*****************************************************************************
- *
  * driver setup and teardown
  *
  *****************************************************************************/
@@ -3550,21 +3572,6 @@ static void iwl_uninit_drv(struct iwl_priv *priv)
 	kfree(priv->scan_cmd);
 }
 
-static struct attribute *iwl_sysfs_entries[] = {
-	&dev_attr_temperature.attr,
-	&dev_attr_tx_power.attr,
-	&dev_attr_rts_ht_protection.attr,
-#ifdef CONFIG_IWLWIFI_DEBUG
-	&dev_attr_debug_level.attr,
-#endif
-	NULL
-};
-
-static struct attribute_group iwl_attribute_group = {
-	.name = NULL,		/* put in device directory */
-	.attrs = iwl_sysfs_entries,
-};
-
 static struct ieee80211_ops iwl_hw_ops = {
 	.tx = iwl_mac_tx,
 	.start = iwl_mac_start,
@@ -3750,11 +3757,6 @@ static int iwl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 		IWL_ERR(priv, "Error allocating IRQ %d\n", priv->pci_dev->irq);
 		goto out_disable_msi;
 	}
-	err = sysfs_create_group(&pdev->dev.kobj, &iwl_attribute_group);
-	if (err) {
-		IWL_ERR(priv, "failed to create sysfs device attributes\n");
-		goto out_free_irq;
-	}
 
 	iwl_setup_deferred_work(priv);
 	iwl_setup_rx_handlers(priv);
@@ -3788,15 +3790,13 @@ static int iwl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 
 	err = iwl_request_firmware(priv, true);
 	if (err)
-		goto out_remove_sysfs;
+		goto out_destroy_workqueue;
 
 	return 0;
 
- out_remove_sysfs:
+ out_destroy_workqueue:
 	destroy_workqueue(priv->workqueue);
 	priv->workqueue = NULL;
-	sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
- out_free_irq:
 	free_irq(priv->pci_dev->irq, priv);
 	iwl_free_isr_ict(priv);
  out_disable_msi:
diff --git a/drivers/net/wireless/iwlwifi/iwl-core.c b/drivers/net/wireless/iwlwifi/iwl-core.c
index 5a7eca8fb789..426e95567de3 100644
--- a/drivers/net/wireless/iwlwifi/iwl-core.c
+++ b/drivers/net/wireless/iwlwifi/iwl-core.c
@@ -854,6 +854,45 @@ void iwl_set_rxon_chain(struct iwl_priv *priv)
 }
 EXPORT_SYMBOL(iwl_set_rxon_chain);
 
+/* Return valid channel */
+u8 iwl_get_single_channel_number(struct iwl_priv *priv,
+				  enum ieee80211_band band)
+{
+	const struct iwl_channel_info *ch_info;
+	int i;
+	u8 channel = 0;
+
+	/* only scan single channel, good enough to reset the RF */
+	/* pick the first valid not in-use channel */
+	if (band == IEEE80211_BAND_5GHZ) {
+		for (i = 14; i < priv->channel_count; i++) {
+			if (priv->channel_info[i].channel !=
+			    le16_to_cpu(priv->staging_rxon.channel)) {
+				channel = priv->channel_info[i].channel;
+				ch_info = iwl_get_channel_info(priv,
+					band, channel);
+				if (is_channel_valid(ch_info))
+					break;
+			}
+		}
+	} else {
+		for (i = 0; i < 14; i++) {
+			if (priv->channel_info[i].channel !=
+			    le16_to_cpu(priv->staging_rxon.channel)) {
+					channel =
+						priv->channel_info[i].channel;
+					ch_info = iwl_get_channel_info(priv,
+						band, channel);
+					if (is_channel_valid(ch_info))
+						break;
+			}
+		}
+	}
+
+	return channel;
+}
+EXPORT_SYMBOL(iwl_get_single_channel_number);
+
 /**
  * iwl_set_rxon_channel - Set the phymode and channel values in staging RXON
  * @phymode: MODE_IEEE80211A sets to 5.2GHz; all else set to 2.4GHz
diff --git a/drivers/net/wireless/iwlwifi/iwl-core.h b/drivers/net/wireless/iwlwifi/iwl-core.h
index 7e5a5ba41fd2..31775bd9c361 100644
--- a/drivers/net/wireless/iwlwifi/iwl-core.h
+++ b/drivers/net/wireless/iwlwifi/iwl-core.h
@@ -343,6 +343,8 @@ int iwl_check_rxon_cmd(struct iwl_priv *priv);
 int iwl_full_rxon_required(struct iwl_priv *priv);
 void iwl_set_rxon_chain(struct iwl_priv *priv);
 int iwl_set_rxon_channel(struct iwl_priv *priv, struct ieee80211_channel *ch);
+u8 iwl_get_single_channel_number(struct iwl_priv *priv,
+				  enum ieee80211_band band);
 void iwl_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_config *ht_conf);
 u8 iwl_is_ht40_tx_allowed(struct iwl_priv *priv,
 			 struct ieee80211_sta_ht_cap *sta_ht_inf);
diff --git a/drivers/net/wireless/iwlwifi/iwl3945-base.c b/drivers/net/wireless/iwlwifi/iwl3945-base.c
index 3e5bffb6034f..6c353cacc8d6 100644
--- a/drivers/net/wireless/iwlwifi/iwl3945-base.c
+++ b/drivers/net/wireless/iwlwifi/iwl3945-base.c
@@ -1844,6 +1844,49 @@ static void iwl3945_irq_tasklet(struct iwl_priv *priv)
 #endif
 }
 
+static int iwl3945_get_single_channel_for_scan(struct iwl_priv *priv,
+					       struct ieee80211_vif *vif,
+					       enum ieee80211_band band,
+					       struct iwl3945_scan_channel *scan_ch)
+{
+	const struct ieee80211_supported_band *sband;
+	u16 passive_dwell = 0;
+	u16 active_dwell = 0;
+	int added = 0;
+	u8 channel = 0;
+
+	sband = iwl_get_hw_mode(priv, band);
+	if (!sband) {
+		IWL_ERR(priv, "invalid band\n");
+		return added;
+	}
+
+	active_dwell = iwl_get_active_dwell_time(priv, band, 0);
+	passive_dwell = iwl_get_passive_dwell_time(priv, band, vif);
+
+	if (passive_dwell <= active_dwell)
+		passive_dwell = active_dwell + 1;
+
+
+	channel = iwl_get_single_channel_number(priv, band);
+
+	if (channel) {
+		scan_ch->channel = channel;
+		scan_ch->type = 0;	/* passive */
+		scan_ch->active_dwell = cpu_to_le16(active_dwell);
+		scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
+		/* Set txpower levels to defaults */
+		scan_ch->tpc.dsp_atten = 110;
+		if (band == IEEE80211_BAND_5GHZ)
+			scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
+		else
+			scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
+		added++;
+	} else
+		IWL_ERR(priv, "no valid channel found\n");
+	return added;
+}
+
 static int iwl3945_get_channels_for_scan(struct iwl_priv *priv,
 					 enum ieee80211_band band,
 				     u8 is_active, u8 n_probes,
@@ -2992,9 +3035,16 @@ void iwl3945_request_scan(struct iwl_priv *priv, struct ieee80211_vif *vif)
 	/* select Rx antennas */
 	scan->flags |= iwl3945_get_antenna_flags(priv);
 
-	scan->channel_count =
-		iwl3945_get_channels_for_scan(priv, band, is_active, n_probes,
-			(void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)], vif);
+	if (priv->is_internal_short_scan) {
+		scan->channel_count =
+			iwl3945_get_single_channel_for_scan(priv, vif, band,
+				(void *)&scan->data[le16_to_cpu(
+				scan->tx_cmd.len)]);
+	} else {
+		scan->channel_count =
+			iwl3945_get_channels_for_scan(priv, band, is_active, n_probes,
+				(void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)], vif);
+	}
 
 	if (scan->channel_count == 0) {
 		IWL_DEBUG_SCAN(priv, "channel count %d\n", scan->channel_count);