[linguist@masterlinkcorp.com]

This is just a random observation, I don't know this piece of code
or the kernel in general, but instinct tells me that where is says
"if (!fd) return -EBADF", it should say "if (!file) return -EBADF".
Just a heads up.

Regards,
Rich

static int tiocgdev(unsigned fd, unsigned cmd,  unsigned int *ptr) 
{ 

	struct file *file = fget(fd);
	struct tty_struct *real_tty;

	if (!fd)
		return -EBADF;
	if (file->f_op->ioctl != tty_ioctl)
		return -EINVAL; 
	real_tty = (struct tty_struct *)file->private_data;
	if (!real_tty) 	
		return -EINVAL; 
	return put_user(new_encode_dev(tty_devnum(real_tty)), ptr); 
}