linux-kernel - Re: [PATCH] serial: core: Fix serial core port id, including multiport devices

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Message-ID: <ZNUBHaDTsAXVNNLZ@smile.fi.intel.com>
Date:   Thu, 10 Aug 2023 18:24:13 +0300
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>, Dhruva Gole <d-gole@...com>,
        Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>,
        John Ogness <john.ogness@...utronix.de>,
        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,
        Guenter Roeck <linux@...ck-us.net>
Subject: Re: [PATCH] serial: core: Fix serial core port id, including
 multiport devices

On Thu, Aug 10, 2023 at 09:57:34AM +0300, Tony Lindgren wrote:
> We want to fix the serial core port DEVNAME to use a port id of the
> hardware specific controller port instance instead of the port->line.
> 
> For example, the 8250 driver sets up a number of serial8250 ports
> initially that can be inherited by the hardware specific driver. At that
> the port->line no longer decribes the port's relation to the serial core
> controller instance.
> 
> Let's fix the issue by assigning port->port_id for each serial core
> controller port instance.

...

> +	unsigned int min = 0, max = ~0U;

Shouldn't this be int? The max IIRC will be INT_MAX with this anyway.

-- 
With Best Regards,
Andy Shevchenko