From: Allan Stephens <allan.stephens@windriver.com>
Date: Tue, 15 Apr 2008 07:06:12 +0000 (-0700)
Subject: [TIPC]: Skip connection flow control in connectionless sockets
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=990098068fe963f956c14f681bd88d90dcb14584;p=linux-beck.git

[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>
---

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);
 	}