[PATCH] USB: console: prevent ENODEV on node

Prevent ENODEV on a /dev/ttyUSBx, used as a USB-serial console.

From: Paul Fulghum <paulkf@microgate.com>
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/usb/serial/usb-serial.c

@@ -201,13 +201,13 @@ static int serial_open (struct tty_struct *tty, struct file * filp)
 	 
 	++port->open_count;
 
-	if (port->open_count == 1) {
-
 	/* set up our port structure making the tty driver
 	 * remember our port object, and us it */
 	tty->driver_data = port;
 	port->tty = tty;
 
+	if (port->open_count == 1) {
+
 		/* lock this module before we call it
 		 * this may fail, which means we must bail out,
 		 * safe because we are called with BKL held */