http://git.kernel.org/cgit/linux/kernel/git/stable/linux-stable.git/commit/?id=8905e272a595430e4b24deb1c1239a63fb2f2c70 From 8905e272a595430e4b24deb1c1239a63fb2f2c70 Mon Sep 17 00:00:00 2001 From: Johan Hovold Date: Wed, 18 Jan 2012 00:46:00 +0000 Subject: USB: ftdi_sio: fix initial baud rate commit 108e02b12921078a59dcacd048079ece48a4a983 upstream. Fix regression introduced by commit b1ffb4c851f1 ("USB: Fix Corruption issue in USB ftdi driver ftdi_sio.c") which caused the termios settings to no longer be initialised at open. Consequently it was no longer possible to set the port to the default speed of 9600 baud without first changing to another baud rate and back again. Reported-by: Roland Ramthun Signed-off-by: Johan Hovold Tested-by: Roland Ramthun Signed-off-by: Greg Kroah-Hartman --- --- linux-2.6.28/drivers/usb/serial/ftdi_sio.c +++ linux-2.6.28/drivers/usb/serial/ftdi_sio.c @@ -1545,6 +1545,7 @@ static int ftdi_open(struct tty_struct *tty, struct usb_serial_port *port, struct file *filp) { /* ftdi_open */ + struct ktermios dummy; struct usb_device *dev = port->serial->dev; struct ftdi_private *priv = usb_get_serial_port_data(port); unsigned long flags; @@ -1575,9 +1576,10 @@ This is same behaviour as serial.c/rs_open() - Kuba */ /* ftdi_set_termios will send usb control messages */ - if (tty) - ftdi_set_termios(tty, port, tty->termios); - + if (tty) { + memset(&dummy, 0, sizeof(dummy)); + ftdi_set_termios(tty, port, &dummy); + } /* FIXME: Flow control might be enabled, so it should be checked - we have no control of defaults! */ /* Turn on RTS and DTR since we are not flow controlling by default */