Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Wed, 10 Apr 2002 12:52:43 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Wed, 10 Apr 2002 12:52:42 -0400 Received: from smtp-out-7.wanadoo.fr ([193.252.19.26]:33769 "EHLO mel-rto7.wanadoo.fr") by vger.kernel.org with ESMTP id ; Wed, 10 Apr 2002 12:52:40 -0400 Content-Type: text/plain; charset=US-ASCII From: Duncan Sands To: David Brownell Subject: Re: [linux-usb-devel] Re: 2.5.8-pre3: kernel BUG at usb.c:849! (preempt_count 1) Date: Wed, 10 Apr 2002 18:51:45 +0200 X-Mailer: KMail [version 1.3.2] In-Reply-To: <20020410114144.N8314@sventech.com> <06da01c1e0ae$69106ce0$6800000a@brownell.org> Cc: Kernel List , rml@tech9.net, linux-usb-devel@lists.sourceforge.net, Johannes Erdfelt MIME-Version: 1.0 Content-Transfer-Encoding: 7BIT Message-Id: Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Wednesday 10 April 2002 6:40 pm, you wrote: > > > UP x86 K6 system running 2.5.8-pre3 with preemption. > > > Using usb-uhci. I got the following bug when powering off: > > > > > > usb.c: USB disconnect on device 3 > > > ... > > Does the same BUG happen with "uhci"? I haven't been able to reproduce it yet with usb-uhci... I will try uhci also. > And what usb device driver(s) were supposed to have stopped > using "device 3"? I've only noticed such device refcounting bugs > being caused by the USB device drivers with bad disconnect() > routines, not usbcore or any of the host controller drivers, but of > course that can change. Ha! $ cat /proc/bus/usb/drivers usbfs hub There are no other drivers! I have a USB webcam and a modem attached. I didn't compile the driver for the webcam, and the modem has a user space driver that works via usbfs. Duncan. T: Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 Spd=12 MxCh= 2 B: Alloc= 0/900 us ( 0%), #Int= 0, #Iso= 0 D: Ver= 1.00 Cls=09(hub ) Sub=00 Prot=00 MxPS= 8 #Cfgs= 1 P: Vendor=0000 ProdID=0000 Rev= 0.00 S: Product=USB UHCI Root Hub S: SerialNumber=b800 C:* #Ifs= 1 Cfg#= 1 Atr=40 MxPwr= 0mA I: If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub E: Ad=81(I) Atr=03(Int.) MxPS= 8 Ivl=255ms T: Bus=01 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#= 2 Spd=12 MxCh= 0 D: Ver= 1.00 Cls=ff(vend.) Sub=ff Prot=ff MxPS= 8 #Cfgs= 1 P: Vendor=046d ProdID=0840 Rev= 1.00 S: Product=Camera C:* #Ifs= 1 Cfg#= 1 Atr=80 MxPwr=500mA I: If#= 0 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=(none) E: Ad=81(I) Atr=01(Isoc) MxPS= 0 Ivl=1ms E: Ad=82(I) Atr=03(Int.) MxPS= 1 Ivl=16ms I: If#= 0 Alt= 1 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=(none) E: Ad=81(I) Atr=01(Isoc) MxPS=1023 Ivl=1ms E: Ad=82(I) Atr=03(Int.) MxPS= 1 Ivl=16ms T: Bus=01 Lev=01 Prnt=01 Port=01 Cnt=02 Dev#= 3 Spd=12 MxCh= 0 D: Ver= 1.10 Cls=ff(vend.) Sub=00 Prot=00 MxPS= 8 #Cfgs= 1 P: Vendor=06b9 ProdID=4061 Rev= 0.00 S: Manufacturer=ALCATEL S: Product=Speed Touch USB S: SerialNumber=0090D02C2C5A C:* #Ifs= 3 Cfg#= 1 Atr=80 MxPwr=500mA I: If#= 0 Alt= 0 #EPs= 1 Cls=ff(vend.) Sub=00 Prot=00 Driver=usbfs E: Ad=81(I) Atr=03(Int.) MxPS= 16 Ivl=50ms I: If#= 1 Alt= 0 #EPs= 0 Cls=ff(vend.) Sub=00 Prot=00 Driver=usbfs I: If#= 1 Alt= 1 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=usbfs E: Ad=06(O) Atr=02(Bulk) MxPS= 64 Ivl=0ms E: Ad=07(O) Atr=02(Bulk) MxPS= 64 Ivl=0ms E: Ad=87(I) Atr=02(Bulk) MxPS= 64 Ivl=0ms I: If#= 1 Alt= 2 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=usbfs E: Ad=06(O) Atr=02(Bulk) MxPS= 32 Ivl=0ms E: Ad=07(O) Atr=02(Bulk) MxPS= 32 Ivl=0ms E: Ad=87(I) Atr=02(Bulk) MxPS= 64 Ivl=0ms I: If#= 1 Alt= 3 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=usbfs E: Ad=06(O) Atr=02(Bulk) MxPS= 16 Ivl=0ms E: Ad=07(O) Atr=02(Bulk) MxPS= 16 Ivl=0ms E: Ad=87(I) Atr=02(Bulk) MxPS= 64 Ivl=0ms I: If#= 2 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=(none) E: Ad=05(O) Atr=02(Bulk) MxPS= 8 Ivl=0ms E: Ad=85(I) Atr=02(Bulk) MxPS= 8 Ivl=0ms - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/