@@ -69,7 +69,7 @@ struct br2684_vcc {
struct net_device *device;
/* keep old push, pop functions for chaining */
void (*old_push) (struct atm_vcc * vcc, struct sk_buff * skb);
- /* void (*old_pop)(struct atm_vcc *vcc, struct sk_buff *skb); */
+ void (*old_pop)(struct atm_vcc *vcc, struct sk_buff *skb);
enum br2684_encaps encaps;
struct list_head brvccs;
#ifdef CONFIG_ATM_BR2684_IPFILTER
@@ -143,6 +143,23 @@ static struct net_device *br2684_find_de
return NULL;
}
+/* chained vcc->pop function. Check if we should wake the netif_queue */
+static void br2684_pop(struct atm_vcc *vcc, struct sk_buff *skb)
+{
+ struct br2684_vcc *brvcc = BR2684_VCC(vcc);
+ struct net_device *net_dev = brvcc->device;
+
+ pr_debug("br2684_pop(vcc %p ; net_dev %p )\n", vcc, net_dev);
+ brvcc->old_pop(vcc, skb);
+
+ if (!net_dev)
+ return;
+
+ if (atm_may_send(vcc, 0)) {
+ netif_wake_queue(net_dev);
+ }
+}
+
/*
* Send a packet out a particular vcc. Not to useful right now, but paves
* the way for multiple vcc's per itf. Returns true if we can send,
@@ -200,20 +217,22 @@ static int br2684_xmit_vcc(struct sk_buf
ATM_SKB(skb)->vcc = atmvcc = brvcc->atmvcc;
pr_debug("atm_skb(%p)->vcc(%p)->dev(%p)\n", skb, atmvcc, atmvcc->dev);
- if (!atm_may_send(atmvcc, skb->truesize)) {
- /*
- * We free this here for now, because we cannot know in a higher
- * layer whether the skb pointer it supplied wasn't freed yet.
- * Now, it always is.
- */
- dev_kfree_skb(skb);
- return 0;
- }
+
atomic_add(skb->truesize, &sk_atm(atmvcc)->sk_wmem_alloc);
ATM_SKB(skb)->atm_options = atmvcc->atm_options;
brdev->stats.tx_packets++;
brdev->stats.tx_bytes += skb->len;
atmvcc->send(atmvcc, skb);
+
+ if (!atm_may_send(atmvcc, 0)) {
+ netif_stop_queue(brvcc->device);
+ barrier();
+ /* check for race with br26864_pop*/
+ if (atm_may_send(atmvcc, 0)) {
+ netif_start_queue(brvcc->device);
+ }
+ }
+
return 1;
}
@@ -509,8 +528,10 @@ static int br2684_regvcc(struct atm_vcc
atmvcc->user_back = brvcc;
brvcc->encaps = (enum br2684_encaps)be.encaps;
brvcc->old_push = atmvcc->push;
+ brvcc->old_pop = atmvcc->pop;
barrier();
atmvcc->push = br2684_push;
+ atmvcc->pop = br2684_pop;
rq = &sk_atm(atmvcc)->sk_receive_queue;
@@ -621,6 +642,8 @@ static int br2684_create(void __user * a
write_lock_irq(&devs_lock);
brdev->payload = payload;
+ netif_start_queue(netdev);
+
brdev->number = list_empty(&br2684_devs) ? 1 :
BRPRIV(list_entry_brdev(br2684_devs.prev))->number + 1;
list_add_tail(&brdev->br2684_devs, &br2684_devs);