Linux: Hanging inside hid_close()

[libusb]

Linux: Hanging inside hid_close()

[Youw]

I wasn't able to reproduce the original issue, presumably because I don't have a device that would allow me to do so.
I believe there is a race condition, that when hit, may lead to deadlock, when trying to close the device, in case if device submits transfers/interruptions frequently, and device is being closed exactly during successful handling of such transfer.

The fix suggested in #143 kind-of fixes the issue. Kind-of, because it constantly tries not to hit a deadlock, but a race condition is still there, it is a root cause, and we better fix a root cause, not symptoms.

@vozhyk-com would you be able to check a patch I prepared, with your device? https://github.com/libusb/hidapi/tree/libusb-hang

[vozhyk-com]

I confirm that the patch from branch libusb-hang solves #142 issue. I can not reproduce it with the patch, but easy can reproduce without.

[Youw]

That's awesome news. As I hoped, the root issue found and fixed.