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    SubjectRe: [PATCH] usb: add new usb gadget for ACM and mass storage
    On Fri, 16 Sep 2011, Sebastian Andrzej Siewior wrote:

    > * Greg KH | 2011-09-09 11:43:54 [-0700]:
    > >So we can expect more patches like this adding all of the possible
    > >permutations of the different gadget devices?
    > >
    > >If so, ick, I thought that the work that was done was to prevent this
    > >from happening, oh well :(
    > Would it be possible to come up with a gadget-hub driver which can have
    > multiple gadget attached? This should get rid of this kind of gadget
    > drivers, right?

    Instead of implementing a hub, it might be possible to redo the
    composite driver in such a way that the individual function drivers are
    added as separate modules at runtime, rather than all bound together at
    compile time.

    The details would be tricky, but I think it could be done. One
    important point is that somehow you have to inform the composite core
    when all the function drivers have been loaded and initialized --
    otherwise there's no way to tell when it's safe to enable the pull-ups
    and connect to the host.

    Alan Stern

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