diff options
| -rw-r--r-- | net/tipc/link.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/net/tipc/link.c b/net/tipc/link.c index c7406c1fdc14..06327f78f203 100644 --- a/net/tipc/link.c +++ b/net/tipc/link.c @@ -877,9 +877,8 @@ void tipc_link_reset(struct tipc_link *l) int tipc_link_xmit(struct tipc_link *l, struct sk_buff_head *list, struct sk_buff_head *xmitq) { - struct tipc_msg *hdr = buf_msg(skb_peek(list)); unsigned int maxwin = l->window; - unsigned int i, imp = msg_importance(hdr); + unsigned int i; unsigned int mtu = l->mtu; u16 ack = l->rcv_nxt - 1; u16 seqno = l->snd_nxt; @@ -888,7 +887,13 @@ int tipc_link_xmit(struct tipc_link *l, struct sk_buff_head *list, struct sk_buff_head *backlogq = &l->backlogq; struct sk_buff *skb, *_skb, *bskb; int pkt_cnt = skb_queue_len(list); + struct tipc_msg *hdr; + int imp; + + if (pkt_cnt <= 0) + return 0; + imp = msg_importance(hdr); /* Match msg importance against this and all higher backlog limits: */ if (!skb_queue_empty(backlogq)) { for (i = imp; i <= TIPC_SYSTEM_IMPORTANCE; i++) { @@ -896,6 +901,8 @@ int tipc_link_xmit(struct tipc_link *l, struct sk_buff_head *list, return link_schedule_user(l, list); } } + + hdr = buf_msg(skb_peek(list)); if (unlikely(msg_size(hdr) > mtu)) { skb_queue_purge(list); return -EMSGSIZE; |