From 92eec01f564c93de2b46c3bcbac369d41ee0cf9c Mon Sep 17 00:00:00 2001
From: ligd <liguiding1@xiaomi.com>
Date: Wed, 14 Jul 2021 17:58:01 +0800
Subject: [PATCH] socket_rpmsg: fix recv block when remote close early

MIRTOS-849

Change-Id: Id9ff88099bdc0efb27d64ffa8e407f5a9dd40e33
Signed-off-by: ligd <liguiding1@xiaomi.com>
(cherry picked from commit 85b917e20869f415c847c37731c5745c7942a9fd)
---
 net/rpmsg/rpmsg_sockif.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/net/rpmsg/rpmsg_sockif.c b/net/rpmsg/rpmsg_sockif.c
index a30d7076a4b..348c78e8e44 100644
--- a/net/rpmsg/rpmsg_sockif.c
+++ b/net/rpmsg/rpmsg_sockif.c
@@ -253,6 +253,11 @@ static int rpmsg_socket_wakeup(FAR struct rpmsg_socket_conn_s *conn)
   uint32_t space;
   int ret = 0;
 
+  if (!conn->ept.rdev)
+    {
+      return ret;
+    }
+
   space = conn->recvpos - conn->lastpos;
 
   if (space > circbuf_size(&conn->recvbuf) / 2)