1) Problem with current->state in serport_ldisc_read.
    	   Solved by using wait_event_interruptible()
    	2) Problem when serport_ldisc_read() is entered twice.
    	   Solved using set_bit et al.
    	3) Complex naming of the serio ports.
    	   Using tty_name() instead.
    	4) Possible stack overflows in name generations.
    	   Using tty_name() instead.