[PATCH net] sctp: do not pr_err for the duplicated node in transport rhlist

[Xin Long]

The pr_err in sctp_hash_transport was supposed to report a sctp bug
for using rhashtable/rhlist.

The err '-EEXIST' introduced in Commit cd2b70875058 ("sctp: check
duplicate node before inserting a new transport") doesn't belong
to that case.

So just return -EEXIST back without pr_err any kmsg.

Fixes: cd2b70875058 ("sctp: check duplicate node before inserting a new 
transport")
Reported-by: Wei Chen <weic...@redhat.com>
Signed-off-by: Xin Long <lucien....@gmail.com>
---
 net/sctp/input.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/net/sctp/input.c b/net/sctp/input.c
index 141c9c4..0247cc4 100644
--- a/net/sctp/input.c
+++ b/net/sctp/input.c
@@ -897,15 +897,12 @@ int sctp_hash_transport(struct sctp_transport *t)
        rhl_for_each_entry_rcu(transport, tmp, list, node)
                if (transport->asoc->ep == t->asoc->ep) {
                        rcu_read_unlock();
-                       err = -EEXIST;
-                       goto out;
+                       return -EEXIST;
                }
        rcu_read_unlock();
 
        err = rhltable_insert_key(&sctp_transport_hashtable, &arg,
                                  &t->node, sctp_hash_params);
-
-out:
        if (err)
                pr_err_once("insert transport fail, errno %d\n", err);
 
-- 
2.1.0