Partial data on timeouts about gousb

[codido]

libusb_bulk_transfer & libusb_interrupt_transfer are no longer being used, so this seems to be resolved.

[zagrodzki]

Actually not just yet - transfer() returns 0 on error

[zagrodzki]

but I'm working on it :) I'll update this issue when I think all places are correct and covered by tests.

[codido]

Sure thing, though looking at the documentation it seems like the status of partial asynchronous transfers will be set to LIBUSB_TRANSFER_COMPLETED:
http://libusb.sourceforge.net/api-1.0/group__asyncio.html#ga9fcb2aa23d342060ebda1d0cf7478856

Is this misleading and LIBUSB_TRANSFER_TIMED_OUT can still be returned with partial xfer data?

[zagrodzki]

I think so. It's still the case that a single transfer might be split up by the host into multiple transactions, and some of them might succeed before the transfer completes. Same with isochronous transfers where some packets are transmitted before the transfer times out. But I'm not really sure and I haven't dig through libusb sources to check. If you want to look for confirmation one way or another in libusb sources, that'd be welcome :)

[codido]

Skimming through the code, seems that you're right - libusb_bulk_transfer just uses the asynchronous functions, so the two seem to share the same behavior - LIBUSB_TRANSFER_TIMED_OUT may be returned with actual_length != 0.

[zagrodzki]

I believe this is now addressed.