linux-kernel - [PATCH 4/9] serial: sc16is7xx: remove redundant code in rs485

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Message-Id: <20220213222737.15709-5-LinoSanfilippo@gmx.de>
Date:   Sun, 13 Feb 2022 23:27:32 +0100
From:   Lino Sanfilippo <LinoSanfilippo@....de>
To:     gregkh@...uxfoundation.org, jirislaby@...nel.org
Cc:     linux@...linux.org.uk, richard.genoud@...il.com,
        nicolas.ferre@...rochip.com, alexandre.belloni@...tlin.com,
        ludovic.desroches@...rochip.com, shawnguo@...nel.org,
        s.hauer@...gutronix.de, kernel@...gutronix.de, festevam@...il.com,
        linux-imx@....com, mcoquelin.stm32@...il.com,
        alexandre.torgue@...s.st.com, linux-serial@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-stm32@...md-mailman.stormreply.com, lukas@...ner.de,
        Lino Sanfilippo <LinoSanfilippo@....de>
Subject: [PATCH 4/9] serial: sc16is7xx: remove redundant code in rs485_config

When RS485 is configured by userspace the serial core already checks for
valid RTS settings. So remove the check from the implementation of the
sc16is7xx drivers rs485_config function to avoid redundancy.

Signed-off-by: Lino Sanfilippo <LinoSanfilippo@....de>
---
 drivers/tty/serial/sc16is7xx.c | 10 ----------
 1 file changed, 10 deletions(-)

diff --git a/drivers/tty/serial/sc16is7xx.c b/drivers/tty/serial/sc16is7xx.c
index 64e7e6c8145f..730f697bb517 100644
--- a/drivers/tty/serial/sc16is7xx.c
+++ b/drivers/tty/serial/sc16is7xx.c
@@ -959,16 +959,6 @@ static int sc16is7xx_config_rs485(struct uart_port *port,
 	struct sc16is7xx_one *one = to_sc16is7xx_one(port, port);
 
 	if (rs485->flags & SER_RS485_ENABLED) {
-		bool rts_during_rx, rts_during_tx;
-
-		rts_during_rx = rs485->flags & SER_RS485_RTS_AFTER_SEND;
-		rts_during_tx = rs485->flags & SER_RS485_RTS_ON_SEND;
-
-		if (rts_during_rx == rts_during_tx)
-			dev_err(port->dev,
-				"unsupported RTS signalling on_send:%d after_send:%d - exactly one of RS485 RTS flags should be set\n",
-				rts_during_tx, rts_during_rx);
-
 		/*
 		 * RTS signal is handled by HW, it's timing can't be influenced.
 		 * However, it's sometimes useful to delay TX even without RTS
-- 
2.34.1