usbd config file parse behaviour

[M. Warner Losh]

In message: <20040328002334.GA15543 at cicely12.cicely.de>
            Bernd Walter <ticso at cicely12.cicely.de> writes:
: On Sat, Mar 27, 2004 at 04:55:56PM -0700, M. Warner Losh wrote:
: > In message: <20040326074634.GG94505 at cicely12.cicely.de>
: >             Bernd Walter <ticso at cicely12.cicely.de> writes:
: > : I'm working on getting devd(8) usable for usb devices.
: > 
: > The part I'm not sure about is where you add the pnpinfo to the
: > devaddq stuff.  All that stuff should generally be in devaddq.  Why
: > did you did it the way you did and what were you able to gain by it?
: 
: Fact is that we need more information then available for attach/detach
: statements right now to replace usbd - especially the serial number of
: a device was the part that I'm interested in.

OK.  That makes sense.

: What still puzzles me is why pnpinfo is currently only part in case of
: unassigned new devices - it looks intentionaly to be left out for other
: cases - therefor the current patch just adds it in the most simple way
: to test the other part and was never intended as a commit candidate.
: Do you think there could be problems with pnpinfo for other type of
: devices (cardbus, pcmcia, acpi, ...)?

No problems.  I didn't add it because I originally thought that devd
could look up the device and tease it out.  However, it would be
convenient to have this information at hand, and it does eliminate a
potential race condition to provide it all at once.  The only thing I
worry about it exceeding some static limit in devd/devctl.  And if we
do, we can increase it because we malloc things in the kernel and
having a bigger userland buffer isn't going to hurt.

I'll look into these issues and see how hard this will be.

Btw, any interest in making it possible to kldload a usb module and
having device attach to it?  Right now the usb code assumes that you
can unplug the device and replug it back in.  I have at least two
devices on my laptop that can't be removed (bluetooth and memory stick
reader), so I can't dynamically load drivers for them...

Warner