HelenOS sources

req_clear_port_feature  595 uspace/drv/bus/usb/ehci/ehci_rh.c 		.callback = req_clear_port_feature,
req_clear_port_feature  514 uspace/drv/bus/usb/ohci/ohci_rh.c 		.callback = req_clear_port_feature,
req_clear_port_feature  476 uspace/drv/bus/usb/uhci/uhci_rh.c 		.callback = req_clear_port_feature
req_clear_port_feature  371 uspace/drv/bus/usb/vhc/hub/virthubops.c 		.callback = req_clear_port_feature