linux-kernel - [PATCH 4/4] serial: ar933x: Remove unneeded static structure

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Date: Sun,  7 Apr 2024 02:27:09 +0200
From: Lino Sanfilippo <l.sanfilippo@...bus.com>
To: gregkh@...uxfoundation.org,
	jirislaby@...nel.org
Cc: LinoSanfilippo@....de,
	lukas@...ner.de,
	p.rosenberger@...bus.com,
	ilpo.jarvinen@...ux.intel.com,
	linux-kernel@...r.kernel.org,
	linux-serial@...r.kernel.org,
	Lino Sanfilippo <l.sanfilippo@...bus.com>
Subject: [PATCH 4/4] serial: ar933x: Remove unneeded static structure

In case that no RTS GPIO is available do not use a dedicated nullified
serial_rs485 struct to disable RS485 support, but simply delete the
SER_RS485_ENABLED flag in the ports rs485_supported struct.
This make the structure superfluous and it can be removed.

Signed-off-by: Lino Sanfilippo <l.sanfilippo@...bus.com>
---
 drivers/tty/serial/ar933x_uart.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/tty/serial/ar933x_uart.c b/drivers/tty/serial/ar933x_uart.c
index 8d09ace062e5..be9ea988d136 100644
--- a/drivers/tty/serial/ar933x_uart.c
+++ b/drivers/tty/serial/ar933x_uart.c
@@ -699,7 +699,6 @@ static struct uart_driver ar933x_uart_driver = {
 	.cons		= NULL, /* filled in runtime */
 };
 
-static const struct serial_rs485 ar933x_no_rs485 = {};
 static const struct serial_rs485 ar933x_rs485_supported = {
 	.flags = SER_RS485_ENABLED | SER_RS485_RTS_ON_SEND | SER_RS485_RTS_AFTER_SEND,
 };
@@ -795,7 +794,7 @@ static int ar933x_uart_probe(struct platform_device *pdev)
 	up->rts_gpiod = mctrl_gpio_to_gpiod(up->gpios, UART_GPIO_RTS);
 
 	if (!up->rts_gpiod) {
-		port->rs485_supported = ar933x_no_rs485;
+		port->rs485_supported.flags &= ~SER_RS485_ENABLED;
 		if (port->rs485.flags & SER_RS485_ENABLED) {
 			dev_err(&pdev->dev, "lacking rts-gpio, disabling RS485\n");
 			port->rs485.flags &= ~SER_RS485_ENABLED;
-- 
2.43.2