Re: [PATCH v2 1/5] serial: 8250: extract serial8250_init_mctrl()

[Ilpo Järvinen]

On Tue, 24 Jun 2025, Jiri Slaby (SUSE) wrote:

> After commit 795158691cc0 ("serial: 8250: extract
> serial8250_initialize()"), split serial8250_initialize() even more --
> the mctrl part of this code can be separated into
> serial8250_init_mctrl() -- done now.
> 
> Signed-off-by: Jiri Slaby (SUSE) <jirislaby@xxxxxxxxxx>
> Suggested-by: Ilpo Järvinen <ilpo.jarvinen@xxxxxxxxxxxxxxx>

Heh, I didn't even realize I was suggesting this :-D but it's good 
nonetheless.

Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@xxxxxxxxxxxxxxx>

> Cc: Andy Shevchenko <andy.shevchenko@xxxxxxxxx>
> ---
> [v2]
> * use port-> directly.
> * do not remove curly braces.
> Both rebase errors -- noticed by Andy.
> ---
>  drivers/tty/serial/8250/8250_port.c | 21 +++++++++++++--------
>  1 file changed, 13 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/tty/serial/8250/8250_port.c b/drivers/tty/serial/8250/8250_port.c
> index 48c30e158cb8..0f85a2f292fc 100644
> --- a/drivers/tty/serial/8250/8250_port.c
> +++ b/drivers/tty/serial/8250/8250_port.c
> @@ -2216,15 +2216,8 @@ static void serial8250_THRE_test(struct uart_port *port)
>  		up->bugs |= UART_BUG_THRE;
>  }
>  
> -static void serial8250_initialize(struct uart_port *port)
> +static void serial8250_init_mctrl(struct uart_port *port)
>  {
> -	struct uart_8250_port *up = up_to_u8250p(port);
> -	unsigned long flags;
> -	bool lsr_TEMT, iir_NOINT;
> -
> -	serial_port_out(port, UART_LCR, UART_LCR_WLEN8);
> -
> -	uart_port_lock_irqsave(port, &flags);
>  	if (port->flags & UPF_FOURPORT) {
>  		if (!port->irq)
>  			port->mctrl |= TIOCM_OUT1;
> @@ -2235,6 +2228,18 @@ static void serial8250_initialize(struct uart_port *port)
>  	}
>  
>  	serial8250_set_mctrl(port, port->mctrl);
> +}
> +
> +static void serial8250_initialize(struct uart_port *port)
> +{
> +	struct uart_8250_port *up = up_to_u8250p(port);
> +	unsigned long flags;
> +	bool lsr_TEMT, iir_NOINT;
> +
> +	serial_port_out(port, UART_LCR, UART_LCR_WLEN8);
> +
> +	uart_port_lock_irqsave(port, &flags);
> +	serial8250_init_mctrl(port);
>  
>  	/*
>  	 * Serial over Lan (SoL) hack:
> 

-- 
 i.