serial/uart_rpmsg: should init the lock before call rpmsg_register_ca…

…llback

To avoid init the lock after this lock has been used.

Signed-off-by: Bowen Wang <wangbowen6@xiaomi.com>

drivers/serial/uart_rpmsg.c

@@ -444,6 +444,7 @@ int uart_rpmsg_init(FAR const char *cpuname, FAR const char *devname,
       goto fail;
     }
 
+  nxmutex_init(&priv->lock);
   priv->cpuname = cpuname;
   priv->devname = devname;
 
@@ -456,10 +457,10 @@ int uart_rpmsg_init(FAR const char *cpuname, FAR const char *devname,
                                 NULL);
   if (ret < 0)
     {
+      nxmutex_destroy(&priv->lock);
       goto fail;
     }
 
-  nxmutex_init(&priv->lock);
   snprintf(dev_name, sizeof(dev_name), "%s%s",
            UART_RPMSG_DEV_PREFIX, devname);
   uart_register(dev_name, dev);