Re: [Libusb-devel] usbfs: usb_submit_urb returned -121

[Peter S. <pe...@st...>]

Ludovic Rousseau wrote:
> libusb returns -99 (LIBUSB_ERROR_OTHER)
..
> libusb:warning [do_sync_bulk_transfer] unrecognised status code 1

Alan's description is helpful. libusb does handle when transfer >=2
in a multi-URB transfer submitted to Linux fails. libusb discards the
previous transfers and sets reap_action=SUBMIT_FAILED. As libusb is
reaping the URBs, it notices that one could not be submitted, and
returns an error.

Ludovic, please try the attached patch. It checks if any data was
already transferred by this multi-URB transfer, and if so returns
without error - and although I think this might work I'm not positive
that it's correct to require any data to have been transferred -
could there have been a 0 byte transfer instead of the 28 here?


//Peter