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-Url: http://git.alex.org.uk

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

BugLink: http://bugs.launchpad.net/bugs/987337

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>
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>
---

diff --git a/drivers/usb/serial/pl2303.c b/drivers/usb/serial/pl2303.c
index fc2d66f..5532ea5 100644
--- a/drivers/usb/serial/pl2303.c
+++ b/drivers/usb/serial/pl2303.c
@@ -421,7 +421,7 @@ 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;