Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752608AbZGWIWh (ORCPT ); Thu, 23 Jul 2009 04:22:37 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752117AbZGWIWg (ORCPT ); Thu, 23 Jul 2009 04:22:36 -0400 Received: from smtp1.linux-foundation.org ([140.211.169.13]:46020 "EHLO smtp1.linux-foundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750957AbZGWIWf (ORCPT ); Thu, 23 Jul 2009 04:22:35 -0400 Date: Thu, 23 Jul 2009 01:21:40 -0700 From: Andrew Morton To: Ferenc Wagner Cc: linux-kernel@vger.kernel.org, alan@lxorguk.ukuu.org.uk, linux-usb@vger.kernel.org Subject: Re: 2.6.31-rc3: replugging USB serial converter uses new device node Message-Id: <20090723012140.39f697d2.akpm@linux-foundation.org> In-Reply-To: <87zlb1u592.fsf@tac.ki.iif.hu> References: <87zlb1u592.fsf@tac.ki.iif.hu> X-Mailer: Sylpheed 2.4.8 (GTK+ 2.12.5; x86_64-redhat-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3068 Lines: 50 (cc linux-usb) On Sat, 18 Jul 2009 22:04:57 +0200 Ferenc Wagner wrote: > Hi, > > Since upgrading to 2.6.31-rc3 from 2.6.30, my ttyUSB device number > keeps increasing on each replug. Output of udevadm monitor: > > ==poff== > UEVENT[1247946169.580772] remove /devices/virtual/net/ppp0 (net) > UDEV [1247946169.589775] remove /devices/virtual/net/ppp0 (net) > ==unplug== > UEVENT[1247946186.700698] remove /devices/pci0000:00/0000:00:1d.1/usb3/3-1/3-1:1.0/ttyUSB2/tty/ttyUSB2 (tty) > UEVENT[1247946186.700737] remove /devices/pci0000:00/0000:00:1d.1/usb3/3-1/3-1:1.0/ttyUSB2 (usb-serial) > UEVENT[1247946186.700749] remove /devices/pci0000:00/0000:00:1d.1/usb3/3-1/3-1:1.0 (usb) > UEVENT[1247946186.700760] remove /devices/pci0000:00/0000:00:1d.1/usb3/3-1/usb_device/usbdev3.6 (usb_device) > UEVENT[1247946186.700771] remove /devices/pci0000:00/0000:00:1d.1/usb3/3-1 (usb) > UDEV [1247946186.701535] remove /devices/pci0000:00/0000:00:1d.1/usb3/3-1/3-1:1.0/ttyUSB2/tty/ttyUSB2 (tty) > UDEV [1247946186.705822] remove /devices/pci0000:00/0000:00:1d.1/usb3/3-1/3-1:1.0/ttyUSB2 (usb-serial) > UDEV [1247946186.711662] remove /devices/pci0000:00/0000:00:1d.1/usb3/3-1/3-1:1.0 (usb) > UDEV [1247946186.715237] remove /devices/pci0000:00/0000:00:1d.1/usb3/3-1/usb_device/usbdev3.6 (usb_device) > UDEV [1247946186.718872] remove /devices/pci0000:00/0000:00:1d.1/usb3/3-1 (usb) > ==replug== > UEVENT[1247946199.654628] add /devices/pci0000:00/0000:00:1d.1/usb3/3-1 (usb) > UDEV [1247946199.660946] add /devices/pci0000:00/0000:00:1d.1/usb3/3-1 (usb) > UEVENT[1247946199.661096] add /devices/pci0000:00/0000:00:1d.1/usb3/3-1/3-1:1.0 (usb) > UEVENT[1247946199.688206] add /devices/pci0000:00/0000:00:1d.1/usb3/3-1/3-1:1.0/ttyUSB3 (usb-serial) > UEVENT[1247946199.688254] add /devices/pci0000:00/0000:00:1d.1/usb3/3-1/3-1:1.0/ttyUSB3/tty/ttyUSB3 (tty) > UEVENT[1247946199.688266] add /devices/pci0000:00/0000:00:1d.1/usb3/3-1/usb_device/usbdev3.7 (usb_device) > UDEV [1247946199.710642] add /devices/pci0000:00/0000:00:1d.1/usb3/3-1/3-1:1.0 (usb) > UDEV [1247946199.713898] add /devices/pci0000:00/0000:00:1d.1/usb3/3-1/3-1:1.0/ttyUSB3 (usb-serial) > UDEV [1247946199.729618] add /devices/pci0000:00/0000:00:1d.1/usb3/3-1/usb_device/usbdev3.7 (usb_device) > UDEV [1247946199.739566] add /devices/pci0000:00/0000:00:1d.1/usb3/3-1/3-1:1.0/ttyUSB3/tty/ttyUSB3 (tty) > ==pon== > UEVENT[1247946268.571857] add /devices/virtual/net/ppp0 (net) > UDEV [1247946268.593127] add /devices/virtual/net/ppp0 (net) > > Dmesg is available at http://pastebin.com/d516e3e00. Can anyone say whether this is expected behaviour? Does it actually cause any observeable problems? I expect things will get ugly once it runs out of range. -- 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/