Kernel panic on module unload

[Dmitry Komissaroff]

Hi all!

I'm still working with BT stack. There many questions, but one is very 
important.
BT stack implemented by separated module, which loaded by BT device
module. It contain protocol definitions by filling protosw and
domain structs. All loading and registering successfull. But, when I try
to unload module, kernel goes panic on pffasttimo or pfslowtimo, which
called first.
To solve this problem, I just restrict unloading module, but it apply
brakes to work, because I need reboot, when I want to change something in
the module.

Is there more solution of this problem?