diff --git a/drivers/tty/serial/sc16is7xx.c b/drivers/tty/serial/sc16is7xx.c
index 462029240a209a..5c9e52ce82629b 100644
--- a/drivers/tty/serial/sc16is7xx.c
+++ b/drivers/tty/serial/sc16is7xx.c
@@ -816,6 +816,8 @@ static bool sc16is7xx_port_irq(struct sc16is7xx_port *s, int portno)
 
 		if (rxlen)
 			sc16is7xx_handle_rx(port, rxlen, iir);
+		else
+			rc = false;
 		break;
 		/* CTSRTS interrupt comes only when CTS goes inactive */
 	case SC16IS7XX_IIR_CTSRTS_SRC: