1 files changed, 4 insertions, 9 deletions

diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c
index 827db765459..7e91b3d368c 100644
--- a/drivers/tty/serial/imx.c
+++ b/drivers/tty/serial/imx.c
@@ -1286,22 +1286,17 @@ static int serial_imx_resume(struct platform_device *dev)
 static int serial_imx_probe_dt(struct imx_port *sport,
                 struct platform_device *pdev)
 {
+        static int portnum = 0;
         struct device_node *np = pdev->dev.of_node;
         const struct of_device_id *of_id =
                         of_match_device(imx_uart_dt_ids, &pdev->dev);
-        int ret;
 
         if (!np)
                 return -ENODEV;
 
-        ret = of_alias_get_id(np, "serial");
-        if (ret < 0) {
-                pr_err("%s: failed to get alias id, errno %d\n",
-                        __func__, ret);
-                return -ENODEV;
-        } else {
-                sport->port.line = ret;
-        }
+        sport->port.line = portnum++;
+        if (sport->port.line >= UART_NR)
+                return -EINVAL;
 
         if (of_get_property(np, "fsl,uart-has-rtscts", NULL))
                 sport->have_rtscts = 1;