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tipc: fix compatibility bug 

In commit d999297c3d
("tipc: reduce locking scope during packet reception") we introduced
a new function tipc_link_proto_rcv(). This function contains a bug,
so that it sometimes by error sends out a non-zero link priority value
in created protocol messages.

The bug may lead to an extra link reset at initial link establising
with older nodes. This will never happen more than once, whereafter
the link will work as intended.

We fix this bug in this commit.

Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jon Paul Maloy 2015-07-21 06:42:28 -04:00 committed by David S. Miller
parent 67b2914b9c
commit 16040894b2
1 changed files with 1 additions and 1 deletions
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2
net/tipc/link.c
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@ -1639,7 +1639,7 @@ static int tipc_link_proto_rcv(struct tipc_link *l, struct sk_buff *skb,
rcvgap = peers_snd_nxt - l->rcv_nxt;
if (rcvgap || (msg_probe(hdr)))
tipc_link_build_proto_msg(l, STATE_MSG, 0, rcvgap,
0, l->mtu, xmitq);
0, 0, xmitq);
tipc_link_release_pkts(l, msg_ack(hdr));
/* If NACK, retransmit will now start at right position */