241 	struct snd_usb_substream *data_subs;  in call_retire_callback()  local
243 	data_subs = READ_ONCE(ep->data_subs);  in call_retire_callback()
244 	if (data_subs && ep->retire_data_urb)  in call_retire_callback()
245 		ep->retire_data_urb(data_subs, urb);  in call_retire_callback()
328 	struct snd_usb_substream *data_subs;  in prepare_outbound_urb()  local
334 		data_subs = READ_ONCE(ep->data_subs);  in prepare_outbound_urb()
335 		if (data_subs && ep->prepare_data_urb)  in prepare_outbound_urb()
336 			return ep->prepare_data_urb(data_subs, urb, in_stream_lock);  in prepare_outbound_urb()
405 	struct snd_usb_substream *data_subs;  in notify_xrun()  local
407 	data_subs = READ_ONCE(ep->data_subs);  in notify_xrun()
408 	if (data_subs && data_subs->pcm_substream)  in notify_xrun()
409 		snd_pcm_stop_xrun(data_subs->pcm_substream);  in notify_xrun()
904 				   struct snd_usb_substream *data_subs)  in snd_usb_endpoint_set_callback()  argument
908 	if (data_subs)  in snd_usb_endpoint_set_callback()
909 		ep->lowlatency_playback = data_subs->lowlatency_playback;  in snd_usb_endpoint_set_callback()
912 	WRITE_ONCE(ep->data_subs, data_subs);  in snd_usb_endpoint_set_callback()