208 	struct snd_usb_substream *data_subs;  in call_retire_callback()  local
210 	data_subs = READ_ONCE(ep->data_subs);  in call_retire_callback()
211 	if (data_subs && ep->retire_data_urb)  in call_retire_callback()
212 		ep->retire_data_urb(data_subs, urb);  in call_retire_callback()
294 	struct snd_usb_substream *data_subs;  in prepare_outbound_urb()  local
300 		data_subs = READ_ONCE(ep->data_subs);  in prepare_outbound_urb()
301 		if (data_subs && ep->prepare_data_urb)  in prepare_outbound_urb()
302 			ep->prepare_data_urb(data_subs, urb);  in prepare_outbound_urb()
369 	struct snd_usb_substream *data_subs;  in notify_xrun()  local
371 	data_subs = READ_ONCE(ep->data_subs);  in notify_xrun()
372 	if (data_subs && data_subs->pcm_substream)  in notify_xrun()
373 		snd_pcm_stop_xrun(data_subs->pcm_substream);  in notify_xrun()
788 				   struct snd_usb_substream *data_subs)  in snd_usb_endpoint_set_callback()  argument
792 	WRITE_ONCE(ep->data_subs, data_subs);  in snd_usb_endpoint_set_callback()