linux-kernel - Re: [PATCH v3 2/2] serial: core: Add port port device to flush TX on runtime resume

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Date:   Thu, 24 Nov 2022 08:50:41 +0200
From:   Tony Lindgren <tony@...mide.com>
To:     Andy Shevchenko <andriy.shevchenko@...el.com>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>,
        Jiri Slaby <jirislaby@...nel.org>,
        Johan Hovold <johan@...nel.org>,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        Vignesh Raghavendra <vigneshr@...com>,
        linux-serial@...r.kernel.org, linux-omap@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 2/2] serial: core: Add port port device to flush TX on
 runtime resume

Hi,

Thanks for your review again, will fix what you noted. One idea
for an improvment below though.

* Andy Shevchenko <andriy.shevchenko@...el.com> [221123 18:37]:
> On Wed, Nov 23, 2022 at 10:28:25AM +0200, Tony Lindgren wrote:
> > +EXPORT_SYMBOL(serial_port_get);
> 
> Can we move these to namespace from day 1?

Assuming you mean EXPORT_SYMBOL_NS(), sure.

But we might be better off doing the following:

- Move already exported uart_add_one_port() and uart_remove_one_port()
  from serial_core to serial_port as wrapper functions for serial_core

- Export new functions in serial_core for serial_core_register_port()
  and serial_core_unregister_port() for serial_port to call

This would ensure both serial_core and serial_port modules are
always loaded when a hardware specific serial port driver is
loaded.

This should also leave out the need for serial_port_get() and
serial_port_put().

Regards,

Tony