diff --git a/drivers/tty/serial/rp2.c b/drivers/tty/serial/rp2.c
index a314a943f124..328d6deb6b08 100644
--- a/drivers/tty/serial/rp2.c
+++ b/drivers/tty/serial/rp2.c
@@ -427,7 +427,9 @@ static void rp2_rx_chars(struct rp2_uart_port *up)
 		up->port.icount.rx++;
 	}
 
+	spin_unlock(&up->port.lock);
 	tty_flip_buffer_push(port);
+	spin_lock(&up->port.lock);
 }
 
 static void rp2_tx_chars(struct rp2_uart_port *up)