tipc: Avoid reliable broadcast preparation for NACK messages

Enhance TIPC to skip unnecessary (and, in some cases, redundant)
preparation work when sending a broadcast link NACK message, since this
preparation is only required for broadcast messages that are sent in a
reliable manner. This change also fixes a bug that caused NACK messages
to be improperly counted as "TX packets" in TIPC's broadcast link
statistics.

Signed-off-by: Allan Stephens <Allan.Stephens@windriver.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/net/tipc/bcast.c b/net/tipc/bcast.c
index 63df42b2d101..7dc1dc7151ea 100644
--- a/net/tipc/bcast.c
+++ b/net/tipc/bcast.c
@@ -298,6 +298,7 @@ static void bclink_send_nack(struct tipc_node *n_ptr)
                 msg = buf_msg(buf);
                 tipc_msg_init(msg, BCAST_PROTOCOL, STATE_MSG,
                          INT_H_SIZE, n_ptr->addr);
+                msg_set_non_seq(msg, 1);
                 msg_set_mc_netid(msg, tipc_net_id);
                 msg_set_bcast_ack(msg, mod(n_ptr->bclink.last_in));
                 msg_set_bcgap_after(msg, n_ptr->bclink.gap_after);