From owner-freebsd-usb@FreeBSD.ORG  Wed Apr  4 07:37:24 2007
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From: Hans Petter Selasky <hselasky@c2i.net>
To: "Xiaofan Chen" <xiaofanc@gmail.com>
Date: Wed, 4 Apr 2007 09:37:02 +0200
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Cc: freebsd-usb@freebsd.org
Subject: Re: libusb usb_interrupt_read hangs under FreeBSD
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On Wednesday 04 April 2007 01:55, Xiaofan Chen wrote:
> On 4/3/07, Hans Petter Selasky <hselasky@c2i.net> wrote:
> > Hi,
> >
> > I think that your device is broken, and goes bad when it receives a
> > clear-stall request for the interrupt pipe. That is not very uncommon.
>
> Could you be more clearer? I'd like to communicate this problem
> to the firmware developer of PICKit 2 inside Microchip. Thanks.

The chip does not handle a clear-stall request on the control pipe to 
clear-stall on the interrupt pipe. The result is that the interrupt pipe 
stops, or at least all buffers are cleared.

I could be more detailed, but I think the developers will understand what I 
mean.

--HPS