serial: 8250: Reduce expr in 8250 irq handler

If !up->dma == F, then up->dma == T and can be elided from the
(up->dma && up->dma->tx_err) sub-expression.

Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/serial/8250/8250_port.c b/drivers/tty/serial/8250/8250_port.c
index 40d2d30..b2bbb9d 100644 (file)
--- a/drivers/tty/serial/8250/8250_port.c
+++ b/drivers/tty/serial/8250/8250_port.c
@@ -1811,8 +1811,7 @@ int serial8250_handle_irq(struct uart_port *port, unsigned int iir)
                        status = serial8250_rx_chars(up, status);
        }
        serial8250_modem_status(up);
-       if ((!up->dma || (up->dma && up->dma->tx_err)) &&
-           (status & UART_LSR_THRE))
+       if ((!up->dma || up->dma->tx_err) && (status & UART_LSR_THRE))
                serial8250_tx_chars(up);
 
        spin_unlock_irqrestore(&port->lock, flags);