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

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Message-ID: <Y38uRqAFjKpAPy8J@smile.fi.intel.com>
Date:   Thu, 24 Nov 2022 10:41:42 +0200
From:   Andy Shevchenko <andriy.shevchenko@...el.com>
To:     Tony Lindgren <tony@...mide.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

On Thu, Nov 24, 2022 at 08:50:41AM +0200, Tony Lindgren wrote:
> * 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().

Yes, this is good idea!

-- 
With Best Regards,
Andy Shevchenko