diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c
index 59ce9484875b..017b33cf5587 100644
--- a/drivers/tty/serial/sh-sci.c
+++ b/drivers/tty/serial/sh-sci.c
@@ -1066,11 +1066,8 @@ static irqreturn_t sci_mpxed_interrupt(int irq, void *ptr)
 	 * DR flags
 	 */
 	if (((ssr_status & SCxSR_RDxF(port)) || s->chan_rx) &&
-	    (scr_status & SCSCR_RIE)) {
-		if (port->type == PORT_SCIF || port->type == PORT_HSCIF)
-			sci_handle_fifo_overrun(port);
+	    (scr_status & SCSCR_RIE))
 		ret = sci_rx_interrupt(irq, ptr);
-	}
 
 	/* Error Interrupt */
 	if ((ssr_status & SCxSR_ERRORS(port)) && err_enabled)