> packets get re-queued in the "do_dev_queue_xmit" routine. The crash occurs
> when I block the hard_start_xmit routine on purpose by returning 1
> immediately. The network traffic is VERY low, i.e. not more then 10 packets
> get dropped.  This behavior seems independent of the device driver that I'm
> using (its a ISA Wavelan card).

You MUST set dev->tbusy=1 if you do this. If you arent setting dev->tbusy
then I'd expect the kernel to jam up


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