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

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Message-ID: <20230810090930.fylxbzh5v5jffh75@dhruva>
Date:   Thu, 10 Aug 2023 14:39:30 +0530
From:   Dhruva Gole <d-gole@...com>
To:     Tony Lindgren <tony@...mide.com>
CC:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jiri Slaby <jirislaby@...nel.org>,
        Andy Shevchenko <andriy.shevchenko@...el.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 Aug 10, 2023 at 09:57:34 +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.
> 
> Fixes: 7d695d83767c ("serial: core: Fix serial_base_match() after fixing controller port name")
> Tested-by: Guenter Roeck <linux@...ck-us.net>
> Signed-off-by: Tony Lindgren <tony@...mide.com>
> ---
>  drivers/tty/serial/serial_base.h     |  1 +
>  drivers/tty/serial/serial_base_bus.c | 28 +++++++++++++++++++++++++++-
>  2 files changed, 28 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/tty/serial/serial_base.h b/drivers/tty/serial/serial_base.h
> --- a/drivers/tty/serial/serial_base.h
> +++ b/drivers/tty/serial/serial_base.h
> @@ -16,6 +16,7 @@ struct device;
>  
>  struct serial_ctrl_device {
>  	struct device dev;
> +	struct ida port_ida;

LGTM!

Reviewed-by: Dhruva Gole <d-gole@...com>

[...]

-- 
Best regards,
Dhruva Gole <d-gole@...com>