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From: Hans Petter Selasky <hselasky@c2i.net>
To: FreeBSD USB List <FreeBSD-usb@freebsd.org>
Date: Sat, 28 Jun 2008 19:48:33 +0200
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Cc: ticso@cicely.de
Subject: Re: number of /dev/usb nodes
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Hi,

I am about to set the following USB limits:

#define	USB_BUS_MAX 256			/* units */
#define	USB_DEV_MAX 128			/* units */
#define	USB_IFACE_MAX 32		/* units */
#define	USB_EP_MAX (2*16)		/* hardcoded */
#define	USB_FIFO_MAX (2 * USB_EP_MAX)

The multiplication product of (BUS*DEV*IFACE*FIFO) must fit within a 32-bit 
unsigned integer.

Any objections ?

--HPS