Support changed tty_prepare_flip_string() interface from kernel 3.9.
/* $Id$ */
digraph change {
node [fontname="Helvetica"]
edge [fontname="Helvetica", fontsize="12"]
start
start -> check [weight=5]
check
check -> status [weight=5]
check -> error [label="Response\ntimeout"]
status
status -> end [label="Success", weight=5]
status -> code [label="Refuse", weight=5]
status -> error [label="Change\ntimeout"]
code
code -> ack [weight=2]
start_ack
start_ack -> ack [label="Ack only"]
ack
ack -> check_ack [weight=2]
check_ack
check_ack -> end [label="Ack only"]
check_ack -> error [weight=2]
end
error
}