diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c
index 385b41275e8b7476ae4b30ba7047759d3055d16b..8bd0f8e45b146f110e51da855a16f19889520412 100644
--- a/drivers/tty/serial/fsl_lpuart.c
+++ b/drivers/tty/serial/fsl_lpuart.c
@@ -2930,6 +2930,7 @@ static int lpuart_probe(struct platform_device *pdev)
 	pm_runtime_set_autosuspend_delay(&pdev->dev, UART_AUTOSUSPEND_TIMEOUT);
 	pm_runtime_set_active(&pdev->dev);
 	pm_runtime_enable(&pdev->dev);
+	pm_runtime_mark_last_busy(&pdev->dev);
 
 	ret = lpuart_global_reset(sport);
 	if (ret)