diff options
Diffstat (limited to 'net/tipc/link.c')
| -rw-r--r-- | net/tipc/link.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/net/tipc/link.c b/net/tipc/link.c index 82e4e0e152d1..0b44427e29ec 100644 --- a/net/tipc/link.c +++ b/net/tipc/link.c @@ -882,9 +882,7 @@ 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; - int imp = msg_importance(hdr); unsigned int mtu = l->mtu; u16 ack = l->rcv_nxt - 1; u16 seqno = l->snd_nxt; @@ -893,13 +891,20 @@ 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, **tskb; int pkt_cnt = skb_queue_len(list); + struct tipc_msg *hdr; int rc = 0; + int imp; + + if (pkt_cnt <= 0) + return 0; + hdr = buf_msg(skb_peek(list)); if (unlikely(msg_size(hdr) > mtu)) { skb_queue_purge(list); return -EMSGSIZE; } + imp = msg_importance(hdr); /* Allow oversubscription of one data msg per source at congestion */ if (unlikely(l->backlog[imp].len >= l->backlog[imp].limit)) { if (imp == TIPC_SYSTEM_IMPORTANCE) { |