atm: Use SKB queue and list helpers instead of doing it by-hand.
David S. Miller [Thu, 28 May 2009 23:36:47 +0000 (16:36 -0700)]
Signed-off-by: David S. Miller <davem@davemloft.net>

net/atm/br2684.c
net/atm/clip.c

index 3100a89..bfa8fa9 100644 (file)
@@ -445,9 +445,10 @@ free_skb:
  */
 static int br2684_regvcc(struct atm_vcc *atmvcc, void __user * arg)
 {
+       struct sk_buff_head queue;
        int err;
        struct br2684_vcc *brvcc;
-       struct sk_buff *skb;
+       struct sk_buff *skb, *tmp;
        struct sk_buff_head *rq;
        struct br2684_dev *brdev;
        struct net_device *net_dev;
@@ -505,29 +506,20 @@ static int br2684_regvcc(struct atm_vcc *atmvcc, void __user * arg)
        barrier();
        atmvcc->push = br2684_push;
 
+       __skb_queue_head_init(&queue);
        rq = &sk_atm(atmvcc)->sk_receive_queue;
 
        spin_lock_irqsave(&rq->lock, flags);
-       if (skb_queue_empty(rq)) {
-               skb = NULL;
-       } else {
-               /* NULL terminate the list.  */
-               rq->prev->next = NULL;
-               skb = rq->next;
-       }
-       rq->prev = rq->next = (struct sk_buff *)rq;
-       rq->qlen = 0;
+       skb_queue_splice_init(rq, &queue);
        spin_unlock_irqrestore(&rq->lock, flags);
 
-       while (skb) {
-               struct sk_buff *next = skb->next;
+       skb_queue_walk_safe(&queue, skb, tmp) {
+               struct net_device *dev = skb->dev;
 
-               skb->next = skb->prev = NULL;
-               br2684_push(atmvcc, skb);
-               skb->dev->stats.rx_bytes -= skb->len;
-               skb->dev->stats.rx_packets--;
+               dev->stats.rx_bytes -= skb->len;
+               dev->stats.rx_packets--;
 
-               skb = next;
+               br2684_push(atmvcc, skb);
        }
        __module_get(THIS_MODULE);
        return 0;
index 3dc0a3a..5597b87 100644 (file)
@@ -445,9 +445,9 @@ static int clip_start_xmit(struct sk_buff *skb, struct net_device *dev)
 
 static int clip_mkip(struct atm_vcc *vcc, int timeout)
 {
+       struct sk_buff_head *rq, queue;
        struct clip_vcc *clip_vcc;
-       struct sk_buff *skb;
-       struct sk_buff_head *rq;
+       struct sk_buff *skb, *tmp;
        unsigned long flags;
 
        if (!vcc->push)
@@ -469,39 +469,28 @@ static int clip_mkip(struct atm_vcc *vcc, int timeout)
        vcc->push = clip_push;
        vcc->pop = clip_pop;
 
+       __skb_queue_head_init(&queue);
        rq = &sk_atm(vcc)->sk_receive_queue;
 
        spin_lock_irqsave(&rq->lock, flags);
-       if (skb_queue_empty(rq)) {
-               skb = NULL;
-       } else {
-               /* NULL terminate the list.  */
-               rq->prev->next = NULL;
-               skb = rq->next;
-       }
-       rq->prev = rq->next = (struct sk_buff *)rq;
-       rq->qlen = 0;
+       skb_queue_splice_init(rq, &queue);
        spin_unlock_irqrestore(&rq->lock, flags);
 
        /* re-process everything received between connection setup and MKIP */
-       while (skb) {
-               struct sk_buff *next = skb->next;
-
-               skb->next = skb->prev = NULL;
+       skb_queue_walk_safe(&queue, skb, tmp) {
                if (!clip_devs) {
                        atm_return(vcc, skb->truesize);
                        kfree_skb(skb);
                } else {
+                       struct net_device *dev = skb->dev;
                        unsigned int len = skb->len;
 
                        skb_get(skb);
                        clip_push(vcc, skb);
-                       skb->dev->stats.rx_packets--;
-                       skb->dev->stats.rx_bytes -= len;
+                       dev->stats.rx_packets--;
+                       dev->stats.rx_bytes -= len;
                        kfree_skb(skb);
                }
-
-               skb = next;
        }
        return 0;
 }