[TIPC]: Skip connection flow control in connectionless sockets

This patch optimizes the receive path for SOCK_DGRAM and SOCK_RDM
messages by skipping over code that handles connection-based flow
control.

Signed-off-by: Allan Stephens <allan.stephens@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 1 deletions

diff --git a/net/tipc/socket.c b/net/tipc/socket.c
index ca6f52f392a9..91aa2dc51771 100644
--- a/net/tipc/socket.c
+++ b/net/tipc/socket.c
@@ -919,7 +919,8 @@ restart:
         /* Consume received message (optional) */
 
         if (likely(!(flags & MSG_PEEK))) {
-                if (unlikely(++tsock->p->conn_unacked >= TIPC_FLOW_CONTROL_WIN))
+                if ((sock->state != SS_READY) &&
+                    (++tsock->p->conn_unacked >= TIPC_FLOW_CONTROL_WIN))
                         tipc_acknowledge(tsock->p->ref, tsock->p->conn_unacked);
                 advance_queue(tsock);
         }