linux-kernel - Re: [PATCH 1/3] tty: serial: Add UART driver for Cortina-Access platform

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Date:   Tue, 23 Mar 2021 10:24:08 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Alex Nemirovsky <alex.nemirovsky@...tina-access.com>
Cc:     Jiri Slaby <jirislaby@...nel.org>,
        Jason Li <jason.li@...tina-access.com>,
        linux-kernel@...r.kernel.org, linux-serial@...r.kernel.org
Subject: Re: [PATCH 1/3] tty: serial: Add UART driver for Cortina-Access
 platform

On Thu, Feb 18, 2021 at 06:42:09PM -0800, Alex Nemirovsky wrote:
> +static struct cortina_uart_port *cortina_uart_ports;

Why is this not a per-device pointer?

> +static void __exit cortina_uart_exit(void)
> +{
> +	platform_driver_unregister(&serial_cortina_driver);
> +	uart_unregister_driver(&cortina_uart_driver);
> +	kfree(cortina_uart_ports);

Should not need to free this here, it should be tied to the device, not
the driver.


> +}
> +
> +module_init(cortina_uart_init);
> +module_exit(cortina_uart_exit);
> +
> +MODULE_AUTHOR("Cortina-Access Inc.");
> +MODULE_DESCRIPTION(" Cortina-Access UART driver");
> +MODULE_LICENSE("GPL");
> diff --git a/include/uapi/linux/serial_core.h b/include/uapi/linux/serial_core.h
> index 62c2204..1931892 100644
> --- a/include/uapi/linux/serial_core.h
> +++ b/include/uapi/linux/serial_core.h
> @@ -277,4 +277,7 @@
>  /* Freescale LINFlexD UART */
>  #define PORT_LINFLEXUART	122
>  
> +/* Cortina-Access UART */
> +#define PORT_CORTINA_ACCESS	123

Also, no need for this, right?  I would prefer to not add new ids if at
all possible.

thanks,

greg k-h