> Furthermore, there are problems the simple approach doesn't solve. For
> example, consider what happens when rmmod of an HCD is recursively
> removing all the devices belong the root hub and is working its way
> through the children[] array of some intermediate hub, removing the
> entries one by one. Suppose at the same time khubd detects a new device
> plugged into that hub and so _fills in_ a blank children[] entry. Not a
> good scenario.
>
> Any suggestions?
As this situations involve devices being added or removed, don't you need
the subsystem rw-semaphore anyway?
Regards
Oliver
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