The device test raced sceUsbdCancelTransfer on the first interrupt IN endpoint of the device. On Windows the first one can belong to a mouse or keyboard collection, which the system opens exclusively, so libusb's HID backend cannot read it and the submission failed, reported as a failed cancel race. The test now tries each interrupt IN endpoint, requires a refusal to be the host's I/O error with nothing in flight, and races on the first one the host accepts, with a buffer sized from that endpoint.
sceUsbdGetDevice, sceUsbdGetDeviceSpeed, sceUsbdGetMaxPacketSize,
sceUsbdGetMaxIsoPacketSize, sceUsbdOpenDeviceWithVidPid,
sceUsbdSetInterfaceAltSetting, sceUsbdClearHalt and
sceUsbdDetachKernelDriver follow FreeBSD 11.4 libusb10.c over the host
libusb. The packet sizes and the alternate setting checks are done as
FreeBSD does them, so the library records which interfaces are claimed,
and a device stays known while a handle to it is open.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
simnJS