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    Subject[PATCH 4.20 031/352] serial: fsl_lpuart: clear parity enable bit when disable parity
    Date
    4.20-stable review patch.  If anyone has any objections, please let me know.

    ------------------

    [ Upstream commit 397bd9211fe014b347ca8f95a8f4e1017bac1aeb ]

    Current driver only enable parity enable bit and never clear it
    when user set the termios. The fix clear the parity enable bit when
    PARENB flag is not set in termios->c_cflag.

    Cc: Lukas Wunner <lukas@wunner.de>
    Signed-off-by: Andy Duan <fugang.duan@nxp.com>
    Reviewed-by: Fabio Estevam <festevam@gmail.com>
    Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    drivers/tty/serial/fsl_lpuart.c | 4 ++++
    1 file changed, 4 insertions(+)

    diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c
    index 00c220e4f43c..086642ea4b26 100644
    --- a/drivers/tty/serial/fsl_lpuart.c
    +++ b/drivers/tty/serial/fsl_lpuart.c
    @@ -1479,6 +1479,8 @@ lpuart_set_termios(struct uart_port *port, struct ktermios *termios,
    else
    cr1 &= ~UARTCR1_PT;
    }
    + } else {
    + cr1 &= ~UARTCR1_PE;
    }

    /* ask the core to calculate the divisor */
    @@ -1690,6 +1692,8 @@ lpuart32_set_termios(struct uart_port *port, struct ktermios *termios,
    else
    ctrl &= ~UARTCTRL_PT;
    }
    + } else {
    + ctrl &= ~UARTCTRL_PE;
    }

    /* ask the core to calculate the divisor */
    --
    2.19.1


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