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    Subject[PATCH v2 01/11] serial: mvebu-uart: fix calculation of clock divisor
    Date
    The clock divisor should be rounded to the closest value.

    Signed-off-by: Pali Rohár <pali@kernel.org>
    Fixes: 68a0db1d7da2 ("serial: mvebu-uart: add function to change baudrate")
    Cc: stable@vger.kernel.org # 0e4cf69ede87 ("serial: mvebu-uart: clarify the baud rate derivation")
    ---
    drivers/tty/serial/mvebu-uart.c | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    diff --git a/drivers/tty/serial/mvebu-uart.c b/drivers/tty/serial/mvebu-uart.c
    index e0c00a1b0763..f81bfdaa608c 100644
    --- a/drivers/tty/serial/mvebu-uart.c
    +++ b/drivers/tty/serial/mvebu-uart.c
    @@ -463,7 +463,7 @@ static int mvebu_uart_baud_rate_set(struct uart_port *port, unsigned int baud)
    * makes use of D to configure the desired baudrate.
    */
    m_divisor = OSAMP_DEFAULT_DIVISOR;
    - d_divisor = DIV_ROUND_UP(port->uartclk, baud * m_divisor);
    + d_divisor = DIV_ROUND_CLOSEST(port->uartclk, baud * m_divisor);

    brdv = readl(port->membase + UART_BRDV);
    brdv &= ~BRDV_BAUD_MASK;
    --
    2.20.1
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