[lwip] add re-initial check.
@@ -136,11 +136,19 @@ static void tcpip_init_done_callback(void *arg)
* LwIP system initialization
*/
extern int eth_system_device_init_private(void);
+static volatile uint8_t init_ok = 0;
int lwip_system_init(void)
{
rt_err_t rc;
struct rt_semaphore done_sem;
+ if(init_ok)
+ {
+ rt_kprintf("lwip system already init.\n");
+ return 0;
+ }
+ init_ok = 1;
+
eth_system_device_init_private();
/* set default netif to NULL */
