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.
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