From owner-freebsd-usb@FreeBSD.ORG  Tue Sep 17 08:56:45 2013
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Date: Tue, 17 Sep 2013 10:57:48 +0200
From: Hans Petter Selasky <hans.petter.selasky@bitfrost.no>
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To: lev@FreeBSD.org
Subject: Re: umcs (4-Port-USB-serial) triggering way too much ehci IRQs
References: <52372DBA.6020703@omnilan.de>
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 <875323075.20130917124437@serebryakov.spb.ru> <523816E1.10603@omnilan.de>
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Cc: Harald Schmalzbauer <h.schmalzbauer@omnilan.de>,
 FreeBSD Stable <freebsd-stable@freebsd.org>, freebsd-usb@freebsd.org
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On 09/17/13 10:47, Lev Serebryakov wrote:
> Hello, Harald.
> You wrote 17 сентября 2013 г., 12:46:25:
>
> HS> The Y is the device addr @ bus #X.
>    Oh :)
>
> HS> Same posted some seconds ago :-)
>    Yep, exactly the same pattern.
>


Hi,

Could you show the configuration descriptor for your device?

usbconfig -d X.Y dump_curr_config_desc


?

The interrupt endpoint in question can be throttled by the USB stack, if 
the latency of these events are not important to your application.

--HPS