linux-kernel - [PATCH 7/7] USB: serial: cp210x: clean up auto-RTS handling

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Message-Id: <20210125134817.11749-8-johan@kernel.org>
Date:   Mon, 25 Jan 2021 14:48:17 +0100
From:   Johan Hovold <johan@...nel.org>
To:     linux-usb@...r.kernel.org
Cc:     Pho Tran <Pho.Tran@...abs.com>, linux-kernel@...r.kernel.org,
        Johan Hovold <johan@...nel.org>
Subject: [PATCH 7/7] USB: serial: cp210x: clean up auto-RTS handling

Clear the RTS bits of the flow-control request before determining the
new value when updating the settings.

Signed-off-by: Johan Hovold <johan@...nel.org>
---
 drivers/usb/serial/cp210x.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/usb/serial/cp210x.c b/drivers/usb/serial/cp210x.c
index f00b736f3cd3..cc4f63a06f9e 100644
--- a/drivers/usb/serial/cp210x.c
+++ b/drivers/usb/serial/cp210x.c
@@ -1163,9 +1163,9 @@ static void cp210x_set_flow_control(struct tty_struct *tty,
 	else
 		ctl_hs |= CP210X_SERIAL_DTR_INACTIVE;
 
+	flow_repl &= ~CP210X_SERIAL_RTS_MASK;
 	if (C_CRTSCTS(tty)) {
 		ctl_hs |= CP210X_SERIAL_CTS_HANDSHAKE;
-		flow_repl &= ~CP210X_SERIAL_RTS_MASK;
 		if (port_priv->rts)
 			flow_repl |= CP210X_SERIAL_RTS_FLOW_CTL;
 		else
@@ -1173,7 +1173,6 @@ static void cp210x_set_flow_control(struct tty_struct *tty,
 		port_priv->crtscts = true;
 	} else {
 		ctl_hs &= ~CP210X_SERIAL_CTS_HANDSHAKE;
-		flow_repl &= ~CP210X_SERIAL_RTS_MASK;
 		if (port_priv->rts)
 			flow_repl |= CP210X_SERIAL_RTS_ACTIVE;
 		else
-- 
2.26.2