2.6: irtty vs. irtty-sir

irtty is dabbed as broken in Makefile.

Question - is it fundamentally broken, sometimes broken or under special conditions broken? :)

I need to decide if I replace default ldisc-11 by irtty-sir in 2.6 (risking that some dongles stop working for some people) or leave it as irtty and tell guys who build kernel to use CONFIG_IRTTY_OLD

TIA

-andrey