814 		ep->iface_ref = iface_ref_find(chip, ep->iface);  in snd_usb_endpoint_open()
815 		if (!ep->iface_ref) {  in snd_usb_endpoint_open()
854 		if (WARN_ON(!ep->iface_ref)) {  in snd_usb_endpoint_open()
870 	if (!ep->iface_ref->opened++)  in snd_usb_endpoint_open()
871 		ep->iface_ref->need_setup = true;  in snd_usb_endpoint_open()
922 	if (ep->iface_ref->altset == altset)  in endpoint_set_interface()
940 	ep->iface_ref->altset = altset;  in endpoint_set_interface()
956 	if (!--ep->iface_ref->opened &&  in snd_usb_endpoint_close()
969 		ep->iface_ref = NULL;  in snd_usb_endpoint_close()
980 	if (ep->iface_ref)  in snd_usb_endpoint_suspend()
981 		ep->iface_ref->need_setup = true;  in snd_usb_endpoint_suspend()
1456 	if (WARN_ON(!ep->iface_ref))  in snd_usb_endpoint_prepare()
1462 	if (!ep->iface_ref->need_setup) {  in snd_usb_endpoint_prepare()
1509 	ep->iface_ref->need_setup = false;  in snd_usb_endpoint_prepare()
1694 			if (ep->iface_ref)  in snd_usb_endpoint_stop()
1695 				ep->iface_ref->need_setup = true;  in snd_usb_endpoint_stop()