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Add retry w/ timeout around LIBUSB_ERROR_ACCESS#229

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stevenportley wants to merge 1 commit intomainfrom
usb_open_retry
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Add retry w/ timeout around LIBUSB_ERROR_ACCESS#229
stevenportley wants to merge 1 commit intomainfrom
usb_open_retry

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It is possible for a device to enumerate on the bus and for libhoth to attempt to connect to it before udev has the opportunity to adjust the permissions. This is very common when attempting to reconnect and results in LIBUSB_ERROR_ACCESS failures during DFU updates.

It is possible for a device to enumerate on the bus and for
libhoth to attempt to connect to it before udev has the
opportunity to adjust the permissions.  This is very common
when attempting to reconnect and results in LIBUSB_ERROR_ACCESS
failures during DFU updates.
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