Comment 69 for bug 790183

Sorry to take so long to re-submit the patch,
I'm not familiar with the lib, so takes some time to study it.

For your questions.
1. Because you need to wait for completion of these transfers, but probably you don't.
Actually, we don't have to wait.
When open the device, it won't continue to next state
if fpi_imgdev_open_complete() is not be called.
And we call it at open_loop_complete(), so that makes sure the transfers are all done. There is no race condition.

2. Please, no workarounds, let's fix an issue instead.
Okay, I removed them.
And this issue is not exist as explanation above.

3. I guess it doesn't work on second time, because there's no proper deinit sequence and device is still in active state.
I don't know the deinit commands.
Arseniy, please give me some advice if you know how to get the deinit commands.
BTW, since we don't have the deinit commands, so we call libusb_reset_device() every time when we open the device.
That will probably reset the device and then it can be init again.