diff --git a/drivers/tty/serial/8250/8250_port.c b/drivers/tty/serial/8250/8250_port.c
index 48680565c991..9ef77a52c4f2 100644
--- a/drivers/tty/serial/8250/8250_port.c
+++ b/drivers/tty/serial/8250/8250_port.c
@@ -1489,9 +1489,8 @@ unsigned char serial8250_rx_chars(struct uart_8250_port *up, unsigned char lsr)
 			break;
 		lsr = serial_in(up, UART_LSR);
 	} while (lsr & (UART_LSR_DR | UART_LSR_BI));
-	spin_unlock(&port->lock);
+
 	tty_flip_buffer_push(&port->state->port);
-	spin_lock(&port->lock);
 	return lsr;
 }
 EXPORT_SYMBOL_GPL(serial8250_rx_chars);