From 1ff410957f91d7fcdffadb0a1479567637d96b3c Mon Sep 17 00:00:00 2001
From: "chao.an" <anchao@xiaomi.com>
Date: Wed, 15 Jan 2020 14:05:52 +0800
Subject: [PATCH] sim/net: do not do any critical operations in idle

Change-Id: Ia9011b62ea61d15bd66aa063e4165d9d3baacb51
Signed-off-by: chao.an <anchao@xiaomi.com>
---
 arch/sim/src/sim/up_netdriver.c | 23 ++++++++++++++++++-----
 1 file changed, 18 insertions(+), 5 deletions(-)

diff --git a/arch/sim/src/sim/up_netdriver.c b/arch/sim/src/sim/up_netdriver.c
index 10e2ebe6b52..a974027c603 100644
--- a/arch/sim/src/sim/up_netdriver.c
+++ b/arch/sim/src/sim/up_netdriver.c
@@ -50,6 +50,7 @@
 #include <stdbool.h>
 #include <string.h>
 #include <sched.h>
+#include <nuttx/wqueue.h>
 #include <nuttx/net/net.h>
 
 #include <net/ethernet.h>
@@ -84,6 +85,10 @@ struct timer
 
 static struct timer g_periodic_timer;
 
+/* Net driver worker */
+
+static struct work_s g_network;
+
 /* A single packet buffer is used */
 
 static uint8_t g_pktbuf[MAX_NETDEV_PKTSIZE + CONFIG_NET_GUARDSIZE];
@@ -159,11 +164,7 @@ static int sim_txpoll(struct net_driver_s *dev)
   return 0;
 }
 
-/****************************************************************************
- * Public Functions
- ****************************************************************************/
-
-void netdriver_loop(void)
+static void netdriver_work(FAR void *arg)
 {
   FAR struct eth_hdr_s *eth;
 
@@ -328,6 +329,18 @@ void netdriver_loop(void)
   sched_unlock();
 }
 
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+void netdriver_loop(void)
+{
+  if (work_available(&g_network))
+    {
+      work_queue(LPWORK, &g_network, netdriver_work, NULL, 0);
+    }
+}
+
 int netdriver_ifup(struct net_driver_s *dev)
 {
   netdev_ifup(dev->d_ipaddr);