linux-kernel - Re: [PATCH v3 3/3] serial: core: Move console character device handling from printk

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Message-ID: <ZVzwKeALJ4swIdj0@smile.fi.intel.com>
Date:   Tue, 21 Nov 2023 20:00:09 +0200
From:   Andy Shevchenko <andriy.shevchenko@...el.com>
To:     Tony Lindgren <tony@...mide.com>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jiri Slaby <jirislaby@...nel.org>,
        Petr Mladek <pmladek@...e.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        John Ogness <john.ogness@...utronix.de>,
        Sergey Senozhatsky <senozhatsky@...omium.org>,
        "David S . Miller" <davem@...emloft.net>,
        Dhruva Gole <d-gole@...com>,
        Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>,
        Johan Hovold <johan@...nel.org>,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        Vignesh Raghavendra <vigneshr@...com>,
        linux-kernel@...r.kernel.org, linux-serial@...r.kernel.org
Subject: Re: [PATCH v3 3/3] serial: core: Move console character device
 handling from printk

On Tue, Nov 21, 2023 at 01:31:57PM +0200, Tony Lindgren wrote:
> There's no need for console_setup() to try to figure out the console
> character device name for serial ports early on before uart_add_one_port()
> has been called. And for early debug console we have earlycon.
> 
> Let's handle the serial port specific commandline options in the serial
> core subsystem and drop the handling from printk. The serial core
> subsystem can just call add_preferred_console() when the serial port is
> getting initialized.
> 
> Note that eventually we may want to set up driver specific console quirk
> handling for the serial port device drivers to use. But we need to figure
> out which driver(s) need to call the quirk. So for now, we just move the
> sparc quirk and handle it directly.

...

> +	ret = add_preferred_console_match(name, drv->dev_name, port->line);
> +	if (ret && ret != -ENOENT)
> +		return ret;
> +
> +	return 0;

2nd time and so on, perhaps deserves a helper?

static inline int add_preferred_console...(...)
{
	int ret;

	ret = add_preferred_console_match(name, drv->dev_name, port->line);
	if (ret == -ENOENT)
		return 0;
	return ret;

}

?

-- 
With Best Regards,
Andy Shevchenko