serial: 8250: lcr compute cleanup

* 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>
Link: https://lore.kernel.org/r/20250611100319.186924-26-jirislaby@kernel.org
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 85b75ff0699e9c7e1d3d98dc4c8a65e889f91823..2af89038e50e4d0db179a605d2a36b9681403c6b 100644 (file)
--- 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);