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    SubjectRe: libusb broken on 2.6.28 x86_64 ?
    Mark Lord wrote:
    > I'm trying to use 2.6.28 for the first time on an x86_64 box here
    > with devices controlled by libusb. The devices work on the first
    > access, but then fail on all subsequent accesses. Unplugging/replugging
    > causes them to work again for a single subsequent access.
    >
    > This is with two completely different USB gadgets:
    > a VFD alphanumeric display, and an FTDI serial device in bitbang mode.
    >
    > Did something break in 2.6.28 for libusb devices ??
    ..

    Mmm.. broken only for 64-bit userspace, it seems.

    I've recompiled the same app against 32-bit libs,
    and it works just fine on that 64-bit system,
    as well as on 32-bit systems.

    But not when compiled for pure 64-bit operation on a 64-bit system.

    Looks tricky .. must be a change somewhere that assumes
    a pointer/long is 32-bits or something.

    -ml


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