From fc73c9b4b28e903641888a81a76169a929407383 Mon Sep 17 00:00:00 2001
From: Krzysztof Blazewicz <krzysztof.blazewicz@uxeon.com>
Date: Fri, 26 Aug 2016 10:50:37 +0200
Subject: [PATCH] stmhal/modusocket: set self->nic to MP_OBJ_NULL after socket
 close

This patch makes second and next calls to <socket>.close() a no-op.
It prevents GC from closing the underlying resource after user
already used <socket>.close() explicitly.

fixes #2355
---
 stmhal/modusocket.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/stmhal/modusocket.c b/stmhal/modusocket.c
index fbd1196446..c0e30ce050 100644
--- a/stmhal/modusocket.c
+++ b/stmhal/modusocket.c
@@ -83,6 +83,7 @@ STATIC mp_obj_t socket_close(mp_obj_t self_in) {
     mod_network_socket_obj_t *self = self_in;
     if (self->nic != MP_OBJ_NULL) {
         self->nic_type->close(self);
+        self->nic = MP_OBJ_NULL;
     }
     return mp_const_none;
 }