Re: [PATCH] 2.5.31-serport

[Vojtech Pavlik <vojtech@suse.cz>]

On Fri, Aug 30, 2002 at 03:03:59PM -0700, David S. Miller wrote:
>    From: Russell King <rmk@arm.linux.org.uk>
>    Date: Fri, 30 Aug 2002 22:39:11 +0100
> 
>    2. What happens if I open and try to read from this port while something
>       has the serport_ldisc attached?  I suspect that you'll create nice
>       loop of serio devices in serio.c and an infinite loop when you try to
>       traverse the list to remove a different serio device.
>       
> SERIO devices are not meant to be registered as normal TTYs.
> At least I don't do this for any of the Sparc serial ports
> when they are the keyboard/mouse serio device.

No, but using serport.c, you can bind a serio to a tty via a line
discipline, for example if you want a PC serial mouse on /dev/ttyS0 to
talk to sermouse.c via serio. I don't like the approach much, I hope(d) we
could switch somewhere below the tty layer, but it sort of works, and
maybe will have the bugs fixed sooner or later.

-- 
Vojtech Pavlik
SuSE Labs