From 4c163cf43baf965a2998e7f89dbaeefb09c3c47e Mon Sep 17 00:00:00 2001
From: Roland Takacs <rtakacs.u-szeged@partner.samsung.com>
Date: Mon, 19 Jun 2017 12:18:05 +0200
Subject: [PATCH] Throw error when error happens in the tcp_listen function

---
 net/socket/listen.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/net/socket/listen.c b/net/socket/listen.c
index b05d18aceb..6c39f19b6d 100644
--- a/net/socket/listen.c
+++ b/net/socket/listen.c
@@ -151,7 +151,13 @@ int psock_listen(FAR struct socket *psock, int backlog)
        * accept() is called and enables poll()/select() logic.
        */
 
-      tcp_listen(conn);
+      errcode = tcp_listen(conn);
+
+      if (errcode < 0)
+        {
+          errcode = -errcode;
+          goto errout;
+        }
 #else
       errcode = EOPNOTSUPP;
       goto errout;