usb_ugen_read
rval = usb_ugen_read(hidp->hid_ugen_hdl, dev, uiop, credp);
rval = usb_ugen_read(usbprnp->usbprn_ugen_hdl, dev,
return (usb_ugen_read(ugen_skelp->ugen_skel_hdl, dev,
return (usb_ugen_read(scsa2usbp->scsa2usb_ugen_hdl, dev,
return (usb_ugen_read(usb_mid->mi_ugen_hdl, dev, uio, credp));
int usb_ugen_read(usb_ugen_hdl_t, dev_t, struct uio *, cred_t *);