Phonet: keep TX queue disabled when the device is off
Rémi Denis-Courmont [Mon, 15 Dec 2008 08:53:57 +0000 (00:53 -0800)]
Signed-off-by: Rémi Denis-Courmont <remi.denis-courmont@nokia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/phonet/pep-gprs.c

index 9978afb..803eeef 100644 (file)
@@ -155,12 +155,13 @@ static void gprs_data_ready(struct sock *sk, int len)
 static void gprs_write_space(struct sock *sk)
 {
        struct gprs_dev *dev = sk->sk_user_data;
+       struct net_device *net = dev->net;
        unsigned credits = pep_writeable(sk);
 
        spin_lock_bh(&dev->tx_lock);
        dev->tx_max = credits;
-       if (credits > skb_queue_len(&dev->tx_queue))
-               netif_wake_queue(dev->net);
+       if (credits > skb_queue_len(&dev->tx_queue) && netif_running(net))
+               netif_wake_queue(net);
        spin_unlock_bh(&dev->tx_lock);
 }
 
@@ -168,6 +169,23 @@ static void gprs_write_space(struct sock *sk)
  * Network device callbacks
  */
 
+static int gprs_open(struct net_device *dev)
+{
+       struct gprs_dev *gp = netdev_priv(dev);
+
+       gprs_write_space(gp->sk);
+       return 0;
+}
+
+static int gprs_close(struct net_device *dev)
+{
+       struct gprs_dev *gp = netdev_priv(dev);
+
+       netif_stop_queue(dev);
+       flush_work(&gp->tx_work);
+       return 0;
+}
+
 static int gprs_xmit(struct sk_buff *skb, struct net_device *net)
 {
        struct gprs_dev *dev = netdev_priv(net);
@@ -254,6 +272,8 @@ static void gprs_setup(struct net_device *net)
        net->tx_queue_len       = 10;
 
        net->destructor         = free_netdev;
+       net->open               = gprs_open;
+       net->stop               = gprs_close;
        net->hard_start_xmit    = gprs_xmit; /* mandatory */
        net->change_mtu         = gprs_set_mtu;
        net->get_stats          = gprs_get_stats;
@@ -318,7 +338,6 @@ int gprs_attach(struct sock *sk)
        dev->sk = sk;
 
        printk(KERN_DEBUG"%s: attached\n", net->name);
-       gprs_write_space(sk); /* kick off TX */
        return net->ifindex;
 
 out_rel:
@@ -341,7 +360,5 @@ void gprs_detach(struct sock *sk)
 
        printk(KERN_DEBUG"%s: detached\n", net->name);
        unregister_netdev(net);
-       flush_scheduled_work();
        sock_put(sk);
-       skb_queue_purge(&dev->tx_queue);
 }