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Message-Id: <20090723012140.39f697d2.akpm@linux-foundation.org> Date: Thu, 23 Jul 2009 01:21:40 -0700 From: Andrew Morton <akpm@...ux-foundation.org> To: Ferenc Wagner <wferi@...f.hu> Cc: linux-kernel@...r.kernel.org, alan@...rguk.ukuu.org.uk, linux-usb@...r.kernel.org Subject: Re: 2.6.31-rc3: replugging USB serial converter uses new device node (cc linux-usb) On Sat, 18 Jul 2009 22:04:57 +0200 Ferenc Wagner <wferi@...f.hu> 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@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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