libusb: fix race condition on device close #189
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gh-libusb/hidapi!189
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Delete branch "libusb-hang"
Deleting a branch is permanent. Although the deleted branch may continue to exist for a short time before it actually gets removed, it CANNOT be undone in most cases. Continue?
Read callback may fire itself on its own even after its been
requested to stop and exactly before the calling code
waits for its completion in indefinite loop.
Explicitly preventing re-fireing the submission loop,
fixes the issue.
Fixes: #142.
Signed-off-by: Ihor Dutchak ihor.youw@gmail.com