From owner-freebsd-hackers@FreeBSD.ORG  Fri May 20 13:16:30 2005
Return-Path: <owner-freebsd-hackers@FreeBSD.ORG>
Delivered-To: freebsd-hackers@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id B336816A4CE
	for <freebsd-hackers@freebsd.org>;
	Fri, 20 May 2005 13:16:30 +0000 (GMT)
Received: from swip.net (mailfe02.swip.net [212.247.154.33])
	by mx1.FreeBSD.org (Postfix) with ESMTP id D9EDC43DBC
	for <freebsd-hackers@freebsd.org>;
	Fri, 20 May 2005 13:16:29 +0000 (GMT)
	(envelope-from hselasky@c2i.net)
X-T2-Posting-ID: tC2uFeET5U2ZgUk1ospYHg==
Received: from mp-217-201-83.daxnet.no ([193.217.201.83] verified)
  by mailfe02.swip.net (CommuniGate Pro SMTP 4.3c5)
  with ESMTP id 371874514; Fri, 20 May 2005 15:15:54 +0200
From: Hans Petter Selasky <hselasky@c2i.net>
To: freebsd-hackers@freebsd.org
Date: Fri, 20 May 2005 15:16:41 +0200
User-Agent: KMail/1.7
References: <200505200029.j4K0TJNb000312@karga.hank.home>
In-Reply-To: <200505200029.j4K0TJNb000312@karga.hank.home>
MIME-Version: 1.0
Content-Disposition: inline
Content-Type: text/plain;
  charset="iso-8859-1"
Content-Transfer-Encoding: 7bit
Message-Id: <200505201516.42733.hselasky@c2i.net>
cc: Dirk GOUDERS <gouders@et.bocholt.fh-ge.de>
Subject: Re: page fault in ugenpoll()
X-BeenThere: freebsd-hackers@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
Reply-To: hselasky@c2i.net
List-Id: Technical Discussions relating to FreeBSD
	<freebsd-hackers.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>,
	<mailto:freebsd-hackers-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-hackers>
List-Post: <mailto:freebsd-hackers@freebsd.org>
List-Help: <mailto:freebsd-hackers-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>,
	<mailto:freebsd-hackers-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Fri, 20 May 2005 13:16:30 -0000

On Friday 20 May 2005 02:29, Dirk GOUDERS wrote:
> Hello,
>
> just for completeness, I want to provide a simple program that causes
> a kernel panic when invoked with the argument /dev/ugen0:

The control endpoint /dev/ugen0 does not support polling. But 
polling /dev/ugen0.X should work, where "X" is a number.

"ugenpoll()" in "/sys/dev/usb/ugen.c" should have something like this added:

if(control endpoint) return POLLNVAL; /* and not "return EIO;" */

Please file a PR on this issue using:

>Category:      usb

--HPS