Re: [PATCH] 2.5.31-serport
Vojtech Pavlik (vojtech@suse.cz)
Sat, 31 Aug 2002 00:36:18 +0200
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
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