Description of problem:

When attempting to shutdown, suspend, or unplug the PCMCIA network card
the following error is logged repeatedly:

kernel: unregister_netdevice: waiting for eth0 to become free. Usage count = 2

The network card in question is a Lucent Orinoco 802.11b card.

I have not yet managed to work out how to get the machine to shut down cleanly.

Version-Release number of selected component (if applicable):

kernel-2.4.21-20.1.2024.2.1.nptl
kernel-2.4.22-1.2049.nptl
kernel-2.4.22-1.2051.nptl

How reproducible:

Always.

Steps to Reproduce:
1. Use an Orinoco 802.11b card to connect to the network.
2. Attempt to shutdown the system.
    
Actual results:

When attempting to shutdown the pcmcia subsystem, the following messages is
printed repeatedly, roughly once per second:

kernel: unregister_netdevice: waiting for eth0 to become free. Usage count = 2

Expected results:

The system should shutdown cleanly.

Additional info:

Full text of syslog entries before failure:

cardmgr[498]: executing: './network stop eth0'
modprobe: modprobe: Can't locate module tun6to4
/etc/hotplug/net.agent: Net unregister event not supported.
modprobe: modprobe: Can't locate module char-major-10-134
kernel: unregister_netdevice: waiting for eth0 to become free. Usage count = 2