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further issues with O2MICRO OZ776 (0b97:7772) #18

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Commits on May 13, 2016

  1. Fix support of O2MICRO OZ776 (0b97:7772)

    This reader seems bogous, again:
    This time it crashes randomly during normal communication.
    Requests then weren't answered anymore and bulk reads simply time out.
    After reset, resync or powerdown the reader becomes available again.
    However most operations are disruped by this -
    the reader isn't usable in principle.
    
    This observation is very dependend of the smartcard.
    (Perhaps quality grade during production?)
    Even cards of same batch trigger different errors within applications.
    But it seems all are caused by an libusb-timeout error -7.
    
    This patch resolves all observed disruptions and make the reader
    usable in production once again.
    
    Signed-off-by: Stephan Baerwolf <[email protected]>
    baerwolf committed May 13, 2016
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