From owner-freebsd-hackers@FreeBSD.ORG  Sun Jul  8 04:02:43 2007
Return-Path: <owner-freebsd-hackers@FreeBSD.ORG>
X-Original-To: hackers@freebsd.org
Delivered-To: freebsd-hackers@FreeBSD.ORG
Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52])
	by hub.freebsd.org (Postfix) with ESMTP id 85D1216A47B;
	Sun,  8 Jul 2007 04:02:42 +0000 (UTC) (envelope-from imp@bsdimp.com)
Received: from harmony.bsdimp.com (bsdimp.com [199.45.160.85])
	by mx1.freebsd.org (Postfix) with ESMTP id 3B09C13C455;
	Sun,  8 Jul 2007 04:02:42 +0000 (UTC) (envelope-from imp@bsdimp.com)
Received: from localhost (localhost [127.0.0.1])
	by harmony.bsdimp.com (8.13.8/8.13.4) with ESMTP id l6841Lak099270;
	Sat, 7 Jul 2007 22:01:21 -0600 (MDT) (envelope-from imp@bsdimp.com)
Date: Sat, 07 Jul 2007 22:02:03 -0600 (MDT)
Message-Id: <20070707.220203.776519881.imp@bsdimp.com>
To: xistence@0x58.com
From: "M. Warner Losh" <imp@bsdimp.com>
In-Reply-To: <9496044C-3275-4D9C-8FFF-FD1FCE1F6728@0x58.com>
References: <9496044C-3275-4D9C-8FFF-FD1FCE1F6728@0x58.com>
X-Mailer: Mew version 5.2 on Emacs 21.3 / Mule 5.0 (SAKAKI)
Mime-Version: 1.0
Content-Type: Text/Plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-2.0
	(harmony.bsdimp.com [127.0.0.1]);
	Sat, 07 Jul 2007 22:01:21 -0600 (MDT)
Cc: usb@freebsd.org, hackers@freebsd.org, current@freebsd.org
Subject: Re: device rue causes kernel panic
X-BeenThere: freebsd-hackers@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
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: Sun, 08 Jul 2007 04:02:44 -0000

In message: <9496044C-3275-4D9C-8FFF-FD1FCE1F6728@0x58.com>
            Bert JW Regeer <xistence@0x58.com> writes:
: I have a USB 10/100 FastEthernet device, that is identified as a  
: RealTek device. On 6.2-RELEASE it works without any issues, and some  
: older versions of CURRENT it worked perfectly as well. I csup'ed to  
: CURRENT today (2007-07-07 at 16:30 MST), rebuild my kernel and it  
: failed:
: panic (fmt=0xc0a94933 "Trying sleep, but thread marked as sleeping prohibited")
: _sleep (ident=0xc2322c00...) at /usr/src/sys/kern/kern_synch.c:201
: usbd_transfer (xfer=0xc2322c00) at /usr/src/sys/dev/usb/usbdi.c:333
: usbd_sync_transfer (xfer=0xc2322c00) at /usr/src/sys/dev/usb/usbdi.c:406
: usbd_do_request_flags_pipe ... at /usr/src/sys/dev/usb/usbdi.c:1098
: usbd_do_request_flags ...at /usr/src/sys/dev/usb/usbdi.c:1068
: usbd_do_request at /usr/src/sys/dev/usb/usbdi.c:1060
: rue_read_mem at /usr/src/sys/dev/usb/if_rue.c:227
: rue_csr_read_1 at /usr/src/sys/dev/usb/if_rue.c:276
: rue_miibus_readreg at /usr/src/sys/dev/usb/if_rue.c:376
...
: ruephy_service at miibus_if.h:26	/* Likely wrong */
: mii_tick at /usr/src/sys/dev/mii/mii.c:390
: rue_tick at /usr/src/sys/dev/usb/if_rue.c:935
: softclock at /usr/src/sys/kern/kern_timeout.c:281
...

This driver needs to be re-written ala aue, axe, kue and udav to use a
taskqueue for the mii ticking.  It appears to be the only usb driver
in the tree to still do stuff directly in a callout.  This context
can't sleep...

Warner