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    SubjectRe: [PATCH] hci-usb bugfix
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    Hi Oliver,

    > > which results in the same as if we set NULL for the private pointer when
    > > we claim the second interface. If this really happens then we have more
    > > problems in the driver itself, because this case won't be handled in
    > > either way. However I don't think that this will happen, because for
    >
    > You can trigger it in software through usbfs.

    I've never done this before. Can you show me how?

    > > Bluetooth devices interface 0 and 1 can be seen as a unit. The only
    > > reason that this was split over two interfaces, was that you don't have
    > > to stop the bulk transfers when you change the altsetting on the second
    > > interface.
    >
    > Yes, but you should really stop using the second interface _before_
    > returning returning from disconnect() for _that_ interface. You will
    > operate correctly if the primary interface is disconnected first,
    > but you cannot depend on that. If the secondary interface is
    > disconnected first, you have a window where you illegally use an
    > interface you no longer own.

    You are absolutely right and this needs to be fixed, but this problem is
    a different one than that my patch fixes. However this problem is now on
    my todo list. Thanks for making me aware of.

    Regards

    Marcel


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