diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c
index d879a9b86424f11a49071a995a2dae226062d163..dfeff3951f934627f8ed45e892ee5d30cec3216b 100644
--- a/drivers/tty/serial/imx.c
+++ b/drivers/tty/serial/imx.c
@@ -457,7 +457,10 @@ static inline void imx_transmit_buffer(struct imx_port *sport)
 		}
 	}
 
-	while (!uart_circ_empty(xmit) && !sport->dma_is_txing &&
+	if (sport->dma_is_txing)
+		return;
+
+	while (!uart_circ_empty(xmit) &&
 	       !(readl(sport->port.membase + uts_reg(sport)) & UTS_TXFULL)) {
 		/* send xmit->buf[xmit->tail]
 		 * out the port here */