lennart@augustsson.net said:
> It breaks in several scenarios, here's one:
>     open wsmux
>     open wsmouse
>     close wsmux 

I've tested this, the "open wsmouse" failed with EBUSY,
which looks reasonable for me.

What is a bit strange but still bearable imho:
open wsmouse -> OK
open wsmux -> OK, but doesn't get data from the mouse
close wsmouse
-> wsmux doesn't get data automatically now
close wsmux, open wsmux -> OK and gets data

At least much netter than what we had before:
open wsmux -> OK and gets data
close wsmux
open wsmouse -> OK and gets data
close wsmouse
open wsmux -> OK, but doesn't get data

So it isn't as bad as you are thinking now...

best regards
Matthias