usb serial confuddlement

[M. Warner Losh]

In message: <1096937887.50081.22.camel at RabbitsDen>
            "Alexandre \"Sunny\" Kovalenko" <Alex.Kovalenko at verizon.net> writes:
: One thing, I have noticed about my USB devices, is that driver needs to
: be loaded *before* device is plugged in.

For ucom devices, this is true.  For others, this is no longer true.
I'm trying to figure out why ucom is special.

Warner