From: Johan Hovold <jhovold@gmail.com>
Date: Fri, 23 Mar 2012 14:23:18 +0000 (+0100)
Subject: USB: pl2303: fix DTR/RTS being raised on baud rate change
X-Git-Tag: firefly_0821_release~7541^2~1379
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=e852ef35a54abcfe093a271b21b5686664772493;p=firefly-linux-kernel-4.4.55.git

USB: pl2303: fix DTR/RTS being raised on baud rate change

commit ce5c9851855bab190c9a142761d54ba583ab094c upstream.

DTR/RTS should only be raised when changing baudrate from B0 and not on
any baud rate change (> B0).

Reported-by: Søren Holm <sgh@sgh.dk>
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/usb/serial/pl2303.c b/drivers/usb/serial/pl2303.c
index d44c669cc483..5aa7172e049f 100644
--- a/drivers/usb/serial/pl2303.c
+++ b/drivers/usb/serial/pl2303.c
@@ -424,7 +424,7 @@ static void pl2303_set_termios(struct tty_struct *tty,
 	control = priv->line_control;
 	if ((cflag & CBAUD) == B0)
 		priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS);
-	else
+	else if ((old_termios->c_cflag & CBAUD) == B0)
 		priv->line_control |= (CONTROL_DTR | CONTROL_RTS);
 	if (control != priv->line_control) {
 		control = priv->line_control;