linux-kernel - Re: [PATCH tty-next v3 4/6] serial: 8250: Specify console context for rs485_start/stop

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Message-ID: <ZxulYcgH1kTyx9Kr@smile.fi.intel.com>
Date: Fri, 25 Oct 2024 17:04:17 +0300
From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To: John Ogness <john.ogness@...utronix.de>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Jiri Slaby <jirislaby@...nel.org>, Petr Mladek <pmladek@...e.com>,
	Sergey Senozhatsky <senozhatsky@...omium.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Esben Haabendal <esben@...nix.com>, linux-serial@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Florian Fainelli <florian.fainelli@...adcom.com>,
	Broadcom internal kernel review list <bcm-kernel-feedback-list@...adcom.com>,
	Ray Jui <rjui@...adcom.com>, Scott Branden <sbranden@...adcom.com>,
	"Paul E. McKenney" <paulmck@...nel.org>,
	Arnd Bergmann <arnd@...db.de>, Stefan Wahren <wahrenst@....net>,
	Uwe Kleine-König <u.kleine-koenig@...libre.com>,
	Kevin Hilman <khilman@...libre.com>,
	Markus Schneider-Pargmann <msp@...libre.com>,
	Ronald Wahl <ronald.wahl@...itan.com>, Udit Kumar <u-kumar1@...com>,
	Griffin Kroah-Hartman <griffin@...ah.com>,
	Rengarajan S <rengarajan.s@...rochip.com>,
	Lino Sanfilippo <l.sanfilippo@...bus.com>,
	Serge Semin <fancer.lancer@...il.com>,
	linux-rpi-kernel@...ts.infradead.org,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH tty-next v3 4/6] serial: 8250: Specify console context
 for rs485_start/stop_tx

On Fri, Oct 25, 2024 at 01:03:26PM +0206, John Ogness wrote:
> For RS485 mode, if SER_RS485_RX_DURING_TX is not available, the
> console write callback needs to enable/disable TX. It does this
> by calling the rs485_start/stop_tx() callbacks. However, these

It would be nice if you be consistent across the commit messages and also
provide the names of the callbacks in full, because I dunno if we have a local
stop_tx() or rs485_start() or whatever the above means.

If it is "the rs485_start_tx() / rs485_stop_tx() callbacks.", it's
much clearer for the reader.

> callbacks will disable/enable interrupts, which is a problem

toggle?

> for console write, as it must be responsible for
> disabling/enabling interrupts.

toggling ?

> Add an argument @in_con to the rs485_start/stop_tx() callbacks

As per above.

> to specify if they are being called from console write. If so,
> the callbacks will not handle interrupt disabling/enabling.

toggling ?

> For all call sites other than console write, there is no
> functional change.

So, why not call the parameter better to emphasize that it's about IRQ
toggling? bool toggle_irq ?

-- 
With Best Regards,
Andy Shevchenko