serial: use DIV_ROUND_CLOSEST instead of open coding it

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c
index d2990f7..c7bf31a 100644 (file)
--- a/drivers/tty/serial/serial_core.c
+++ b/drivers/tty/serial/serial_core.c
@@ -421,7 +421,7 @@ uart_get_divisor(struct uart_port *port, unsigned int baud)
        if (baud == 38400 && (port->flags & UPF_SPD_MASK) == UPF_SPD_CUST)
                quot = port->custom_divisor;
        else
-               quot = (port->uartclk + (8 * baud)) / (16 * baud);
+               quot = DIV_ROUND_CLOSEST(port->uartclk, 16 * baud);
 
        return quot;
 }