Re: [PATCH 25/33] serial: 8250: lcr compute cleanup

Ilpo Järvinen
2025-06-11T13:03:25Z

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On Wed, 11 Jun 2025, Jiri Slaby (SUSE) wrote:

> * use 'lcr' as variable containing the "computed value" (and not 'cval')
> * use 'u8' for the type (and not 'unsigned char')
> * drop useless comment
>
> Signed-off-by: Jiri Slaby (SUSE) <jirislaby@kernel.org>

Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>

--
i.

> ---
> drivers/tty/serial/8250/8250_port.c | 23 ++++++++++-------------
> 1 file changed, 10 insertions(+), 13 deletions(-)
>
> diff --git a/drivers/tty/serial/8250/8250_port.c b/drivers/tty/serial/8250/8250_port.c
> index 85b75ff0699e..2af89038e50e 100644
> --- a/drivers/tty/serial/8250/8250_port.c
> +++ b/drivers/tty/serial/8250/8250_port.c
> @@ -2547,23 +2547,20 @@ static unsigned int serial8250_get_divisor(struct uart_port *port,
> return serial8250_do_get_divisor(port, baud, frac);
> }
>
> -static unsigned char serial8250_compute_lcr(struct uart_8250_port *up,
> - tcflag_t c_cflag)
> +static unsigned char serial8250_compute_lcr(struct uart_8250_port *up, tcflag_t c_cflag)
> {
> - unsigned char cval;
> -
> - cval = UART_LCR_WLEN(tty_get_char_size(c_cflag));
> + u8 lcr = UART_LCR_WLEN(tty_get_char_size(c_cflag));
>
> if (c_cflag & CSTOPB)
> - cval |= UART_LCR_STOP;
> + lcr |= UART_LCR_STOP;
> if (c_cflag & PARENB)
> - cval |= UART_LCR_PARITY;
> + lcr |= UART_LCR_PARITY;
> if (!(c_cflag & PARODD))
> - cval |= UART_LCR_EPAR;
> + lcr |= UART_LCR_EPAR;
> if (c_cflag & CMSPAR)
> - cval |= UART_LCR_SPAR;
> + lcr |= UART_LCR_SPAR;
>
> - return cval;
> + return lcr;
> }
>
> void serial8250_do_set_divisor(struct uart_port *port, unsigned int baud,
> @@ -2821,12 +2818,12 @@ serial8250_do_set_termios(struct uart_port *port, struct ktermios *termios,
> const struct ktermios *old)
> {
> struct uart_8250_port *up = up_to_u8250p(port);
> - unsigned char cval;
> unsigned long flags;
> unsigned int baud, quot, frac = 0;
> + u8 lcr;
>
> serial8250_set_mini(port, termios);
> - cval = serial8250_compute_lcr(up, termios->c_cflag);
> + lcr = serial8250_compute_lcr(up, termios->c_cflag);
> baud = serial8250_get_baud_rate(port, termios, old);
> quot = serial8250_get_divisor(port, baud, &frac);
>
> @@ -2839,7 +2836,7 @@ serial8250_do_set_termios(struct uart_port *port, struct ktermios *termios,
> serial8250_rpm_get(up);
> uart_port_lock_irqsave(port, &flags);
>
> - up->lcr = cval; /* Save computed LCR */
> + up->lcr = lcr;
> serial8250_set_trigger_for_slow_speed(port, termios, baud);
> serial8250_set_afe(port, termios);
> uart_update_timeout(port, termios->c_cflag, baud);
>