[64/65] USB: cp210x: initialise baud rate at open

[Greg KH]

3.0-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Johan Hovold <jhovold@xxxxxxxxx>

commit cdc32fd6f7b2b2580d7f1b74563f888e4dd9eb8a upstream.

The newer cp2104 devices require the baud rate to be initialised after
power on. Make sure it is set when port is opened.

Signed-off-by: Johan Hovold <jhovold@xxxxxxxxx>
Cc: Preston Fick <preston.fick@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 drivers/usb/serial/cp210x.c |    4 ++++
 1 file changed, 4 insertions(+)

--- a/drivers/usb/serial/cp210x.c
+++ b/drivers/usb/serial/cp210x.c
@@ -408,6 +408,10 @@ static int cp210x_open(struct tty_struct
 	/* Configure the termios structure */
 	cp210x_get_termios(tty, port);
 
+	/* The baud rate must be initialised on cp2104 */
+	if (tty)
+		cp210x_change_speed(tty, port, NULL);
+
 	return usb_serial_generic_open(tty, port);
 }
 


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