In article <tkrpukey5xn.fsf@parity-error.sm.sony.co.jp>
enami@sm.sony.co.jp writes:

> ITOH Yasufumi <itohy@netbsd.org> writes:
> 
> > Modified Files:
> > 	syssrc/sys/compat/common: tty_43.c
> > 	syssrc/sys/net: if_sl.c if_strip.c
> 
> We need to reset to the default line discipline instead of setting to
> NULL.  What happen someone open a tty after slattach exits.
> 
> IMHO, leaving t_linesw as NULL just makes code complex.

Fixed as suggested.  Thanks.

> And, it is better to test t_linesw directly against each &xxxx_disc
> instead of testing l_no, isn't it?

Agreed.
However, some other portions seem to allow t_linesw to be zero....
If t_linesw will never be zero, the check of other places aren't
needed, either.

What is the intention of the tty change?
-- 
ITOH, Yasufumi