HelenOS sources

usb_hub_set_depth  402 uspace/drv/bus/usb/usbhub/usbhub.c 	if ((opResult = usb_hub_set_depth(hub_dev))) {
usb_hub_set_depth   85 uspace/drv/bus/usb/usbhub/usbhub.h errno_t usb_hub_set_depth(const usb_hub_dev_t *);
HelenOS homepage, sources at GitHub