Karl Hiramoto <karl <at> hiramoto.org> writes:
> Hi, i get this a lot now when doing: "rmmod cp2101 io_edgeport "
> I try and do the rmmod, because i loose comunications on the USB to
> RS-232 adapters.
> ------------[ cut here ]------------
> kernel BUG at kernel/workqueue.c:104!
> invalid operand: 0000 [#1]
Thats because the scheduled work became empty before it was executed.
-- BUG_ON(!list_empty(&work->entry)); --
Looks like someone forgot to flush_scheduled_work() before exiting. Can you
try putting flush_scheduled_work() as the first line in cp2101_exit and
whatever is the exit function of io_edgeport?
Just a wild guess. Things might be more complicated than this, but no harm in
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