Fixed bug with re-opening wireless interface

linux_kernel_modules/mt7697serial/uart.c

@@ -213,7 +213,7 @@ void* mt7697_uart_open(rx_hndlr rx_fcn, void* rx_hndl)
 		goto cleanup;
 	}
 
-	dev_dbg(uart_info->dev, "%s(): fd_hndl(%p)\n", 
+	dev_dbg(uart_info->dev, "%s(): fd_hndl(0x%p)\n", 
 		__func__, uart_info->fd_hndl);
 
 	uart_info->rx_fcn = rx_fcn;
@@ -236,7 +236,7 @@ int mt7697_uart_close(void *arg)
 	struct mt7697_uart_info *uart_info = arg;
 	int ret = 0;
 
-	dev_dbg(uart_info->dev, "%s(): fd_hndl(%p)\n", 
+	dev_dbg(uart_info->dev, "%s(): fd_hndl(0x%p)\n", 
 		__func__, uart_info->fd_hndl);
 
 	if (uart_info->fd_hndl == MT7697_UART_INVALID_FD || 

linux_kernel_modules/mt7697wifi/cfg80211.c

@@ -1145,6 +1145,7 @@ int mt7697_cfg80211_stop(struct mt7697_vif *vif)
 			__func__, ret);
 	}
 
+        vif->cfg->txq_hdl = NULL;
 	vif->cfg->rxq_hdl = NULL;
 
 cleanup:

linux_kernel_modules/mt7697wifi/main.c

@@ -55,6 +55,17 @@ static int mt7697_open(struct net_device *ndev)
 
 	dev_dbg(cfg->dev, "%s(): open net device\n", __func__);
 
+        if (!cfg->rxq_hdl && !cfg->txq_hdl) {
+                dev_dbg(cfg->dev, "%s(): open mt7697 uart\n", __func__);
+		cfg->txq_hdl = cfg->hif_ops->open(mt7697_proc_80211cmd, cfg);
+		if (!cfg->txq_hdl) {
+			dev_err(cfg->dev, "%s(): open() failed\n", __func__);
+			goto cleanup;
+		}
+
+		cfg->rxq_hdl = cfg->txq_hdl;
+        }
+
 	if ((cfg->wifi_cfg.opmode == MT7697_WIFI_MODE_STA_ONLY) &&
 	    (cfg->radio_state == MT7697_RADIO_STATE_OFF)) {
 		ret = mt7697_wr_set_radio_state_req(cfg, MT7697_RADIO_STATE_ON);