tipc: make tipc_link_send_sections_fast exit earlier

Once message build request function returns invalid code, the
process of sending message cannot continue. So in case of message
build failure, tipc_link_send_sections_fast() should return
immediately.

Signed-off-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 4 deletions

diff --git a/net/tipc/link.c b/net/tipc/link.c
index b6de1aa059f4..b6ffa9fab244 100644
--- a/net/tipc/link.c
+++ b/net/tipc/link.c
@@ -1082,6 +1082,9 @@ again:
          */
         res = tipc_msg_build(hdr, msg_sect, num_sect, total_len,
                              sender->max_pkt, &buf);
+        /* Exit if build request was invalid */
+        if (unlikely(res < 0))
+                return res;
 
         read_lock_bh(&tipc_net_lock);
         node = tipc_node_find(destaddr);
@@ -1098,10 +1101,6 @@ exit:
                                 return res;
                         }
 
-                        /* Exit if build request was invalid */
-                        if (unlikely(res < 0))
-                                goto exit;
-
                         /* Exit if link (or bearer) is congested */
                         if (link_congested(l_ptr) ||
                             tipc_bearer_blocked(l_ptr->b_ptr)) {