1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/serial/imx.c b/drivers/serial/imx.c
index 03b495c2de14..04cc88cc528c 100644
--- a/drivers/serial/imx.c
+++ b/drivers/serial/imx.c
@@ -403,7 +403,8 @@ static int imx_startup(struct uart_port *port)
         if (retval) goto error_out2;
 
         retval = request_irq(sport->rtsirq, imx_rtsint,
-                             IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING,
+                             (sport->rtsirq < IMX_IRQS) ? 0 :
+                               IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING,
                              DRIVER_NAME, sport);
         if (retval) goto error_out3;