assertion (dev->qdisc_list == NULL) failed at net/sched/sch_generic.c(530)

[Petr Vandrovec <vandrove@xxxxxxxxxx>]

Hi Dave,
  today I noticed that I'm getting assertion below from 2.6.0-test5-xxx
kernel from monday when I shut down vmnet. After looking at the code
I found that with CONFIG_NET_SCHED disabled there is nobody who would
clear dev->qdisc_list... Code which removes dev from the qdisc_list in
the qdisc_destroy is inside CONFIG_NET_SCHED, and I see no other code
which could clear qdisc_list...

Is this assertion just bogus for CONFIG_NET_SCHED unset, or qdisc_destroy
should not depend on CONFIG_NET_SCHED, or am I missing something in the 
vmnet initialization? It just uses ether_setup(), register_netdev() on
initialization, and unregister_netdev() on module unload.

# insmod vmnet; netifup vmnet1; ifconfig vmnet1 1.2.3.4 up
/dev/vmnet: open called by PID 7413 (vmnet-netifup)
/dev/vmnet: port on hub 1 successfully opened
# ifconfig vmnet1 down
# rmmod vmnet
KERNEL: assertion (dev->qdisc_list == NULL) failed at 
net/sched/sch_generic.c(530)

                                                Thanks,
                                                        Petr Vandrovec
                                                        vandrove@xxxxxxxxxx