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    SubjectRe: [PATCH] usb: add Freescale QE/CPM USB peripheral controller driver
    On Thu, 28 Aug 2008, Arnd Bergmann wrote:

    > Not addressing this driver in particular, but the USB gadget layer in
    > general: This is a horrible interface, since every gadget driver exports
    > the same symbols, you can never build a kernel that includes more than
    > one gadget driver. Even if the drivers are all built as modules, simply
    > loading one of them prevents loading another one.

    This was done deliberately. The relevant standards state that a USB
    device can have no more than one peripheral interface.

    Now, I don't claim to fully support this decision. But there is a
    reason behind it; it's not just a case of bad design.

    Alan Stern

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