tipc: Give Tx of discovery responses priority over link messages
Delay releasing the node lock when processing a neighbor discovery
message until after the optional discovery response message has been
sent. This helps ensure that any link protocol messages sent by a
link endpoint created as a result of a neighbor discovery request
are received after the discovery response is received, thereby
giving the receiving node a chance to create a peer link endpoint to
consume those link protocol messages, if one does not already exist.
Signed-off-by: Allan Stephens <Allan.Stephens@windriver.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
diff --git a/net/tipc/discover.c b/net/tipc/discover.c
index 2345268..580b50a 100644
--- a/net/tipc/discover.c
+++ b/net/tipc/discover.c
@@ -201,14 +201,16 @@
/* Accept discovery message & send response, if necessary */
link_fully_up = link_working_working(link);
- tipc_node_unlock(n_ptr);
- if ((type == DSC_RESP_MSG) || link_fully_up)
- return;
- rbuf = tipc_disc_init_msg(DSC_RESP_MSG, orig, b_ptr);
- if (rbuf != NULL) {
- b_ptr->media->send_msg(rbuf, b_ptr, &media_addr);
- buf_discard(rbuf);
+
+ if ((type == DSC_REQ_MSG) && !link_fully_up) {
+ rbuf = tipc_disc_init_msg(DSC_RESP_MSG, orig, b_ptr);
+ if (rbuf) {
+ b_ptr->media->send_msg(rbuf, b_ptr, &media_addr);
+ buf_discard(rbuf);
+ }
}
+
+ tipc_node_unlock(n_ptr);
}
/**