linux-kernel - [PATCH 3/4] serial: 8250: Remove superfluous sanity check

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Date: Sun,  7 Apr 2024 02:27:08 +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 3/4] serial: 8250: Remove superfluous sanity check

The serial core already checks the RS485 RTS settings for sanity, so remove
the superfluous check in serial8250_em485_config().

Signed-off-by: Lino Sanfilippo <l.sanfilippo@...bus.com>
---
 drivers/tty/serial/8250/8250_port.c | 7 -------
 1 file changed, 7 deletions(-)

diff --git a/drivers/tty/serial/8250/8250_port.c b/drivers/tty/serial/8250/8250_port.c
index 8ca061d3bbb9..86ab6925738a 100644
--- a/drivers/tty/serial/8250/8250_port.c
+++ b/drivers/tty/serial/8250/8250_port.c
@@ -616,13 +616,6 @@ int serial8250_em485_config(struct uart_port *port, struct ktermios *termios,
 {
 	struct uart_8250_port *up = up_to_u8250p(port);
 
-	/* pick sane settings if the user hasn't */
-	if (!!(rs485->flags & SER_RS485_RTS_ON_SEND) ==
-	    !!(rs485->flags & SER_RS485_RTS_AFTER_SEND)) {
-		rs485->flags |= SER_RS485_RTS_ON_SEND;
-		rs485->flags &= ~SER_RS485_RTS_AFTER_SEND;
-	}
-
 	/*
 	 * Both serial8250_em485_init() and serial8250_em485_destroy()
 	 * are idempotent.
-- 
2.43.2