From mboxrd@z Thu Jan  1 00:00:00 1970
From: Andreas Jellinghaus <aj@leogic.com>
Date: Wed, 27 Jun 2007 13:14:22 +0000
Subject: usb + sysfs + udev problems once more
Message-Id: <200706271514.22408.aj@leogic.com>
List-Id: <linux-hotplug.vger.kernel.org>
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To: linux-hotplug@vger.kernel.org

I thought to try the latest ubuntu beta version to see if
kernel + usb + sysfs + udev work as expected, but they don't.
the kernel is 2.6.22-rc, udev is 111-0ubuntu5.=20

I'm posting here, as I guess this is not distribution specific.

the problem I see is this: when I plugin my usb smart card reader,
I see a number of events using "udevmonitor --kernel --environment".
of these I'm interested in these two:

UEVENT[1182947366.505829] add      /devices/pci0000:00/0000:00:1d.2/usb3/3-=
1=20
(usb)
ACTION=ADd
DEVPATH=3D/devices/pci0000:00/0000:00:1d.2/usb3/3-1
SUBSYSTEM=3Dusb
SEQNUM%49
MAJOR=189
MINOR%8
DEVTYPE=3Dusb_device
PHYSDEVBUS=3Dusb
DEVICE=3D/proc/bus/usb/003/003
PRODUCT=8E6/3438/100
TYPE=3D0/0/0
BUSNUM=003
DEVNUM=003


and


UEVENT[1182947366.505908]=20
add      /devices/pci0000:00/0000:00:1d.2/usb3/3-1/3-1:1.0 (usb)
ACTION=ADd
DEVPATH=3D/devices/pci0000:00/0000:00:1d.2/usb3/3-1/3-1:1.0
SUBSYSTEM=3Dusb
SEQNUM%51
DEVTYPE=3Dusb_interface
PHYSDEVBUS=3Dusb
INTERFACE=11/0/0
MODALIAS=3Dusb:v08E6p3438d0100dc00dsc00dp00ic0Bisc00ip00


the first is nice, as it has the DEVICE info. I need that one.
however, only the second is matched by the udev rule:
SYSFS{bInterfaceClass}=3D"0b", SYSFS{bInterfaceSubClass}=3D"00",=20
SYSFS{bInterfaceProtocol}=3D"00" RUN+=3D"/lib/udev/openct_usb"

so in the end my script is called only once, but without DEVICE.

how do I fix this?

or is this a kernel / sysfs problem that cannot be worked around?

and is there any chance udev will create events
for the /dev/bus/usb/ device files it creates?

thanks for your help.

Regards, Andreas

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