ugen20_process() treats any non-EBUSY errno returned by USB_FS_COMPLETE
as device detach and returns LIBUSB20_ERROR_OTHER. This causes libusb10
to set device_is_gone and fail all subsequent transfer with
LIBUSB_ERROR_NO_DEVICE.

However, USB_FS_COMPLETE can also return EINVAL when a completion
references an endpoint that no longer exists, for example after
SET_INTERFACE or SET_CONFIG removes and recreates endpoints. This is a
transient condition and does not indicate device detach.

Treat EINVAL the same as EBUSY and stop draining completions. This
prevents a guest selecting an isochronous streaming altsetting from
permanently breaking the passed-through device.

Reviewed by:    bapt
Event:          Halifax Hackathon 202606
Location:       Peggy's Cove Rock
Sponsored by:   The FreeBSD Foundation
Differential Revision:  https://reviews.freebsd.org/D57542

This makes GCC happy

Fixes:  2879c818e553 ("implement libusb_set_option")
Event:  Halifax Hackathon 202606
Sponsored by:   The FreeBSD Foundation

Reviewed by:    adrian
Event:  Halifax Hackathon 202606
Sponsored by:   The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D57770

Reviewed by:    adrian, bapt
Sponsored by:   The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D57543

Sponsored by:   The FreeBSD Foundation

The USB protocol defines a Zero-Length Packet (ZLP) to signal the end of
a transfer when the data size is an exact multiple of the Maximum Packet
Size (MPS). Without a ZLP in such cases, the device may not be able to
determine that the transfer has completed.

This flag is added to libusb to allow the user send a ZLP in the end
of libusb_xfer.

Reviewed by:    adrian
Sponsored by:   The FreeBSD Foundataion
Differential Revision: https://reviews.freebsd.org/D51759

The libusb has a function to calculate the size from given interface,
alt_setting, endpoint. Implementing it by refactoring the calculating
function for libusb_get_max_iso_packet_size.

Reviewed by:    adrian
Sponsored By:   FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D51225

From
https://github.com/libusb/libusb/commit/6622f386f52807dac76c8a260c98aa02c311bc93#diff-c1f9bc250077d41456a3e580fca0ddf5d8c25b741bff6d9b9505990a8b70b254R2358.
We are able to set all of the option from the init_context. To address
this, we modify the process of setting option in init_context to make it be more clear and then
adapat libusb_set_option inside to all other option.

Reviewed by:    adrian
Sponsored By:   The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D51224

Implement libusb_set_option for API compatibility of libusb upstream
The implementation status of each option is as following:

LIBUSB_OPTION_LOG_LEVEL: just like libusb_set_debug
LIBUSB_OPTION_LOG_CB: add callback support for DPRINTF
LIBUSB_OPTION_NO_DEVICE_DISCOVERY: disable initialization of devd and
netlink when register. Also, create no thread when registration of
callback happens.
LIBUSB_OPTION_USE_USBDK: no needed as USBDK is for Windows

Sponsored by:   The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D50818

libusb provide functions to parse interface association descriptor. This
descriptor indicates that a function is composed by multiple interface
and which interfaces is associate to the target function. This
descriptor is not a separate USB require, instead, it comes with the
config descriptor.

Reviewed by:    adrian
Sponsored by:   The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D50958