linux-kernel - [PATCH 2/5] USB: serial: cp210x: Made sure SERIAL_XOFF

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Message-Id: <1458603476-26882-1-git-send-email-konstantin.shkolnyy@gmail.com>
Date:	Mon, 21 Mar 2016 18:37:56 -0500
From:	Konstantin Shkolnyy <konstantin.shkolnyy@...il.com>
To:	johan@...nel.org
Cc:	linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
	Konstantin Shkolnyy <konstantin.shkolnyy@...il.com>
Subject: [PATCH 2/5] USB: serial: cp210x: Made sure SERIAL_XOFF_CONTINUE flag is clear.

The CRTCTS flag code intended to clear the SERIAL_XOFF_CONTINUE flag, but
did it inconsistently. This change is non-functional for existing chips
because the driver never set the flag and it's clear by default.

Signed-off-by: Konstantin Shkolnyy <konstantin.shkolnyy@...il.com>
---
 drivers/usb/serial/cp210x.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/serial/cp210x.c b/drivers/usb/serial/cp210x.c
index de1606f..ede5c52 100644
--- a/drivers/usb/serial/cp210x.c
+++ b/drivers/usb/serial/cp210x.c
@@ -955,7 +955,6 @@ static void cp210x_set_termios(struct tty_struct *tty,
 			modem_ctl[0] &= ~0x7B;
 			modem_ctl[0] |= 0x09;
 			modem_ctl[4] = 0x80;
-			modem_ctl[7] = 0;
 			dev_dbg(dev, "%s - flow control = CRTSCTS\n", __func__);
 		} else {
 			modem_ctl[0] &= ~0x7B;
@@ -963,6 +962,7 @@ static void cp210x_set_termios(struct tty_struct *tty,
 			modem_ctl[4] = 0x40;
 			dev_dbg(dev, "%s - flow control = NONE\n", __func__);
 		}
+		modem_ctl[7] = 0;
 
 		dev_dbg(dev, "%s - write modem controls = %02x .. .. .. %02x .. .. %02x\n",
 			__func__, modem_ctl[0], modem_ctl[4], modem_ctl[7]);
-- 
1.8.4.5