I'm worried about what will happen with things like
KERNELS=="*" # pointless rule
KERNELS=="doesnt-match" # another pointless rule
Since TK_RULE < TK_M_PARENTS_MAX, we will try to match all three tokens
against parents of the current device. I can't think of a bad case,
but it's not exactly good either.
Signed-off-by: Alan Jenkins <alan-jenkins@tuffmail.co.uk>