[PATCH] libertas: fixed transmission flow control on the mesh interface

This patch implements proper transmission flow control on mshX.

Signed-off-by: Javier Cardona <javier@cozybit.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/libertas/if_usb.c

@@ -60,8 +60,10 @@ static void if_usb_write_bulk_callback(struct urb *urb)
 		/* Wake main thread if commands are pending */
 		if (!adapter->cur_cmd)
 			wake_up_interruptible(&priv->mainthread.waitq);
-		if ((adapter->connect_status == libertas_connected))
+		if ((adapter->connect_status == libertas_connected)) {
 			netif_wake_queue(dev);
+			netif_wake_queue(priv->mesh_dev);
+		}
 	}
 
 	return;
@@ -195,6 +197,9 @@ static int if_usb_probe(struct usb_interface *intf,
 	if (!(priv = wlan_add_card(usb_cardp)))
 		goto dealloc;
 
+	if (wlan_add_mesh(priv))
+		goto dealloc;
+
 	if (libertas_activate_card(priv))
 		goto dealloc;
 
@@ -203,9 +208,6 @@ static int if_usb_probe(struct usb_interface *intf,
 		libertas_found++;
 	}
 
-	if (wlan_add_mesh(priv))
-		goto dealloc;
-
 	usb_get_dev(udev);
 	usb_set_intfdata(intf, usb_cardp);
 
@@ -790,6 +792,7 @@ int libertas_sbi_register_dev(wlan_private * priv)
 	priv->hotplug_device = &(cardp->udev->dev);
 
 	SET_NETDEV_DEV(cardp->eth_dev, &(cardp->udev->dev));
+	SET_NETDEV_DEV(priv->mesh_dev, &(cardp->udev->dev));
 
 	lbs_deb_usbd(&cardp->udev->dev, "udev pointer is at %p\n",
 		    cardp->udev);
@@ -896,6 +899,7 @@ static int if_usb_suspend(struct usb_interface *intf, pm_message_t message)
 		return -1;
 
 	netif_device_detach(cardp->eth_dev);
+	netif_device_detach(priv->mesh_dev);
 
 	/* Unlink tx & rx urb */
 	usb_kill_urb(cardp->tx_urb);
@@ -910,6 +914,7 @@ static int if_usb_suspend(struct usb_interface *intf, pm_message_t message)
 static int if_usb_resume(struct usb_interface *intf)
 {
 	struct usb_card_rec *cardp = usb_get_intfdata(intf);
+	wlan_private *priv = cardp->priv;
 
 	lbs_deb_enter(LBS_DEB_USB);
 
@@ -918,6 +923,7 @@ static int if_usb_resume(struct usb_interface *intf)
 	if_usb_submit_rx_urb(cardp->priv);
 
 	netif_device_attach(cardp->eth_dev);
+	netif_device_attach(priv->mesh_dev);
 
 	lbs_deb_leave(LBS_DEB_USB);
 	return 0;

drivers/net/wireless/libertas/join.c

@@ -807,6 +807,9 @@ int libertas_ret_80211_associate(wlan_private * priv,
 	netif_carrier_on(priv->wlan_dev.netdev);
 	netif_wake_queue(priv->wlan_dev.netdev);
 
+	netif_carrier_on(priv->mesh_dev);
+	netif_wake_queue(priv->mesh_dev);
+
 	lbs_deb_join("ASSOC_RESP: Associated \n");
 
 	memcpy(wrqu.ap_addr.sa_data, adapter->curbssparams.bssid, ETH_ALEN);
@@ -899,6 +902,9 @@ int libertas_ret_80211_ad_hoc_start(wlan_private * priv,
 	netif_carrier_on(priv->wlan_dev.netdev);
 	netif_wake_queue(priv->wlan_dev.netdev);
 
+	netif_carrier_on(priv->mesh_dev);
+	netif_wake_queue(priv->mesh_dev);
+
 	memset(&wrqu, 0, sizeof(wrqu));
 	memcpy(wrqu.ap_addr.sa_data, adapter->curbssparams.bssid, ETH_ALEN);
 	wrqu.ap_addr.sa_family = ARPHRD_ETHER;

drivers/net/wireless/libertas/main.c

@@ -266,8 +266,11 @@ static int wlan_dev_open(struct net_device *dev)
 
 	if (adapter->connect_status == libertas_connected) {
 		netif_carrier_on(priv->wlan_dev.netdev);
-	} else
+		netif_carrier_on(priv->mesh_dev);
+	} else {
 		netif_carrier_off(priv->wlan_dev.netdev);
+		netif_carrier_off(priv->mesh_dev);
+	}
 
 	lbs_deb_leave(LBS_DEB_NET);
 	return 0;
@@ -285,7 +288,7 @@ static int mesh_open(struct net_device *dev)
 	if (pre_open_check(dev) == -1)
 		return -1;
 	priv->mesh_open = 1 ;
-	netif_start_queue(priv->mesh_dev);
+	netif_wake_queue(priv->mesh_dev);
 	if (priv->infra_open == 0)
 		return wlan_dev_open(priv->wlan_dev.netdev) ;
 	return 0;
@@ -317,6 +320,7 @@ static int wlan_dev_close(struct net_device *dev)
 	lbs_deb_enter(LBS_DEB_NET);
 
 	netif_carrier_off(priv->wlan_dev.netdev);
+	netif_carrier_off(priv->mesh_dev);
 	priv->open = 0;
 
 	lbs_deb_leave(LBS_DEB_NET);
@@ -373,6 +377,7 @@ static int wlan_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
 	}
 
 	netif_stop_queue(priv->wlan_dev.netdev);
+	netif_stop_queue(priv->mesh_dev);
 
 	if (libertas_process_tx(priv, skb) == 0)
 		dev->trans_start = jiffies;
@@ -435,8 +440,10 @@ static void wlan_tx_timeout(struct net_device *dev)
 			libertas_send_tx_feedback(priv);
 		} else
 			wake_up_interruptible(&priv->mainthread.waitq);
-	} else if (priv->adapter->connect_status == libertas_connected)
+	} else if (priv->adapter->connect_status == libertas_connected) {
 		netif_wake_queue(priv->wlan_dev.netdev);
+		netif_wake_queue(priv->mesh_dev);
+	}
 
 	lbs_deb_leave(LBS_DEB_TX);
 }
@@ -1029,6 +1036,7 @@ void wlan_remove_mesh(wlan_private *priv)
 	mesh_dev = priv->mesh_dev;
 
 	netif_stop_queue(mesh_dev);
+	netif_carrier_off(priv->mesh_dev);
 
 	device_remove_file(&(mesh_dev->dev), &dev_attr_libertas_mpp);
 	unregister_netdev(mesh_dev);
@@ -1127,6 +1135,7 @@ void libertas_interrupt(struct net_device *dev)
 	if (priv->adapter->psstate == PS_STATE_SLEEP) {
 		priv->adapter->psstate = PS_STATE_AWAKE;
 		netif_wake_queue(dev);
+		netif_wake_queue(priv->mesh_dev);
 	}
 
 	wake_up_interruptible(&priv->mainthread.waitq);

drivers/net/wireless/libertas/scan.c

@@ -807,6 +807,8 @@ int wlan_scan_networks(wlan_private * priv,
 	if (!scancurrentchanonly) {
 		netif_stop_queue(priv->wlan_dev.netdev);
 		netif_carrier_off(priv->wlan_dev.netdev);
+		netif_stop_queue(priv->mesh_dev);
+		netif_carrier_off(priv->mesh_dev);
 	}
 
 	ret = wlan_scan_channel_list(priv,
@@ -825,8 +827,8 @@ int wlan_scan_networks(wlan_private * priv,
 	wlan_scan_process_results(priv);
 
 	if (priv->adapter->connect_status == libertas_connected) {
-		netif_carrier_on(priv->wlan_dev.netdev);
-		netif_wake_queue(priv->wlan_dev.netdev);
+		netif_carrier_on(priv->mesh_dev);
+		netif_wake_queue(priv->mesh_dev);
 	}
 
 out:

drivers/net/wireless/libertas/tx.c

@@ -159,6 +159,7 @@ done:
 		skb_orphan(skb);
 		/* stop processing outgoing pkts */
 		netif_stop_queue(priv->wlan_dev.netdev);
+		netif_stop_queue(priv->mesh_dev);
 		/* freeze any packets already in our queues */
 		priv->adapter->TxLockFlag = 1;
 	} else {
@@ -195,10 +196,13 @@ static void wlan_tx_queue(wlan_private *priv, struct sk_buff *skb)
 
 	WARN_ON(priv->adapter->tx_queue_idx >= NR_TX_QUEUE);
 	adapter->tx_queue_ps[adapter->tx_queue_idx++] = skb;
-	if (adapter->tx_queue_idx == NR_TX_QUEUE)
+	if (adapter->tx_queue_idx == NR_TX_QUEUE) {
 		netif_stop_queue(priv->wlan_dev.netdev);
-	else
+		netif_stop_queue(priv->mesh_dev);
+	} else {
 		netif_start_queue(priv->wlan_dev.netdev);
+		netif_start_queue(priv->mesh_dev);
+	}
 
 	spin_unlock(&adapter->txqueue_lock);
 }
@@ -279,6 +283,8 @@ void libertas_send_tx_feedback(wlan_private * priv)
 	libertas_upload_rx_packet(priv, adapter->currenttxskb);
 	adapter->currenttxskb = NULL;
 	priv->adapter->TxLockFlag = 0;
-	if (priv->adapter->connect_status == libertas_connected)
+	if (priv->adapter->connect_status == libertas_connected) {
 		netif_wake_queue(priv->wlan_dev.netdev);
+		netif_wake_queue(priv->mesh_dev);
+	}
 }