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ppp: Use SKB queue abstraction interfaces in fragment processing. 

No more direct references to SKB queue and list implementation
details.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2011-01-20 22:52:05 -08:00
parent 686a295553
commit d52344a7ae
1 changed files with 16 additions and 15 deletions
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31
drivers/net/ppp_generic.c
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@ -1998,7 +1998,7 @@ ppp_mp_reconstruct(struct ppp *ppp)
u32 seq = ppp->nextseq;
u32 minseq = ppp->minseq;
struct sk_buff_head *list = &ppp->mrq;
struct sk_buff *p, *next;
struct sk_buff *p, *tmp;
struct sk_buff *head, *tail;
struct sk_buff *skb = NULL;
int lost = 0, len = 0;
@ -2007,14 +2007,15 @@ ppp_mp_reconstruct(struct ppp *ppp)
return NULL;
head = list->next;
tail = NULL;
for (p = head; p != (struct sk_buff *) list; p = next) {
next = p->next;
skb_queue_walk_safe(list, p, tmp) {
again:
if (seq_before(PPP_MP_CB(p)->sequence, seq)) {
/* this can't happen, anyway ignore the skb */
netdev_err(ppp->dev, "ppp_mp_reconstruct bad "
"seq %u < %u\n",
PPP_MP_CB(p)->sequence, seq);
head = next;
__skb_unlink(p, list);
kfree_skb(p);
continue;
}
if (PPP_MP_CB(p)->sequence != seq) {
@ -2026,8 +2027,7 @@ ppp_mp_reconstruct(struct ppp *ppp)
lost = 1;
seq = seq_before(minseq, PPP_MP_CB(p)->sequence)?
minseq + 1: PPP_MP_CB(p)->sequence;
next = p;
continue;
goto again;
}
/*
@ -2067,9 +2067,17 @@ ppp_mp_reconstruct(struct ppp *ppp)
* and we haven't found a complete valid packet yet,
* we can discard up to and including this fragment.
*/
if (PPP_MP_CB(p)->BEbits & E)
head = next;
if (PPP_MP_CB(p)->BEbits & E) {
struct sk_buff *tmp2;
skb_queue_reverse_walk_from_safe(list, p, tmp2) {
__skb_unlink(p, list);
kfree_skb(p);
}
head = skb_peek(list);
if (!head)
break;
}
++seq;
}
@ -2110,13 +2118,6 @@ ppp_mp_reconstruct(struct ppp *ppp)
}
ppp->nextseq = PPP_MP_CB(tail)->sequence + 1;
head = tail->next;
}
/* Discard all the skbuffs that we can't use. */
while ((p = list->next) != head) {
__skb_unlink(p, list);
kfree_skb(p);
}
return skb;