1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c
index e2f93874989b..044e86d528ae 100644
--- a/drivers/tty/serial/imx.c
+++ b/drivers/tty/serial/imx.c
@@ -567,6 +567,9 @@ static void imx_start_tx(struct uart_port *port)
         struct imx_port *sport = (struct imx_port *)port;
         unsigned long temp;
 
+        if (uart_circ_empty(&port->state->xmit))
+                return;
+
         if (USE_IRDA(sport)) {
                 /* half duplex in IrDA mode; have to disable receive mode */
                 temp = readl(sport->port.membase + UCR4);