linux-kernel - Re: [PATCH 7/8] serial: ar933x: Remove redundant assignment in rs485

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Date:   Sat, 25 Jun 2022 13:14:03 +0300 (EEST)
From:   Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
To:     Lino Sanfilippo <LinoSanfilippo@....de>
cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jiri Slaby <jirislaby@...nel.org>,
        ilpo.jarvinen@...ux.intel.com, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        vz@...ia.com, linux-arm-kernel@...ts.infradead.org,
        devicetree@...r.kernel.org,
        linux-serial <linux-serial@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>, lukas@...ner.de,
        p.rosenberger@...bus.com, Lino Sanfilippo <l.sanfilippo@...bus.com>
Subject: Re: [PATCH 7/8] serial: ar933x: Remove redundant assignment in
 rs485_config

On Wed, 22 Jun 2022, Lino Sanfilippo wrote:

> From: Lino Sanfilippo <l.sanfilippo@...bus.com>
> 
> In uart_set_rs485_config() the serial core already assigns the passed
> serial_rs485 struct to the uart port.
> 
> So remove the assignment in the drivers rs485_config() function to avoid
> redundancy.
> 
> Signed-off-by: Lino Sanfilippo <l.sanfilippo@...bus.com>
> ---
>  drivers/tty/serial/ar933x_uart.c | 1 -
>  1 file changed, 1 deletion(-)
> 
> diff --git a/drivers/tty/serial/ar933x_uart.c b/drivers/tty/serial/ar933x_uart.c
> index ab2c5b2a1ce8..857e010d01dc 100644
> --- a/drivers/tty/serial/ar933x_uart.c
> +++ b/drivers/tty/serial/ar933x_uart.c
> @@ -591,7 +591,6 @@ static int ar933x_config_rs485(struct uart_port *port,
>  		dev_err(port->dev, "RS485 needs rts-gpio\n");
>  		return 1;
>  	}
> -	port->rs485 = *rs485conf;
>  	return 0;
>  }

Hmm, I realize that for some reason I missed cleaning up this particular 
driver after introducing the serial_rs485 sanitization. It shouldn't need 
that preceeding if block either because ar933x_no_rs485 gets applied if 
there's no rts_gpiod so the core clears SER_RS485_ENABLED.


-- 
 i.