linux-kernel - Re: [PATCH printk v2 14/38] tty: serial: samsung_tty: use console_is

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Message-ID: <Y1KpKX1uxLGtNPJU@alley>
Date:   Fri, 21 Oct 2022 16:14:01 +0200
From:   Petr Mladek <pmladek@...e.com>
To:     John Ogness <john.ogness@...utronix.de>
Cc:     Sergey Senozhatsky <senozhatsky@...omium.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        linux-kernel@...r.kernel.org,
        Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Alim Akhtar <alim.akhtar@...sung.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jiri Slaby <jirislaby@...nel.org>,
        linux-arm-kernel@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org, linux-serial@...r.kernel.org
Subject: Re: [PATCH printk v2 14/38] tty: serial: samsung_tty: use
 console_is_enabled()

On Wed 2022-10-19 17:01:36, John Ogness wrote:
> Replace (console->flags & CON_ENABLED) usage with console_is_enabled().
> 
> Signed-off-by: John Ogness <john.ogness@...utronix.de>
> ---
>  drivers/tty/serial/samsung_tty.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/tty/serial/samsung_tty.c b/drivers/tty/serial/samsung_tty.c
> index 77d1363029f5..8142a0e53ffa 100644
> --- a/drivers/tty/serial/samsung_tty.c
> +++ b/drivers/tty/serial/samsung_tty.c
> @@ -1732,7 +1732,7 @@ static void __init s3c24xx_serial_register_console(void)
>  
>  static void s3c24xx_serial_unregister_console(void)
>  {
> -	if (s3c24xx_serial_console.flags & CON_ENABLED)
> +	if (console_is_enabled(&s3c24xx_serial_console))
>  		unregister_console(&s3c24xx_serial_console);
>  }

As on many other locations, it would be better to check if the console
is in console_list. CON_ENABLED might be disabled even when the
console is registered.

It would be nice to fix this. But it might be done later.

Reviewed-by: Petr Mladek <pmladek@...e.com>

Best Regards,
Petr