150 	[0].s = "loop input to output",
169 	struct f_loopback	*loop = func_to_loop(f);  in loopback_bind()  local
187 	loop->in_ep = usb_ep_autoconfig(cdev->gadget, &fs_loop_source_desc);  in loopback_bind()
188 	if (!loop->in_ep) {  in loopback_bind()
195 	loop->out_ep = usb_ep_autoconfig(cdev->gadget, &fs_loop_sink_desc);  in loopback_bind()
196 	if (!loop->out_ep)  in loopback_bind()
215 			f->name, loop->in_ep->name, loop->out_ep->name);  in loopback_bind()
235 	struct f_loopback	*loop = ep->driver_data;  in loopback_complete()  local
236 	struct usb_composite_dev *cdev = loop->function.config->cdev;  in loopback_complete()
241 		if (ep == loop->out_ep) {  in loopback_complete()
250 			ep = loop->in_ep;  in loopback_complete()
258 			ep = loop->out_ep;  in loopback_complete()
266 			ERROR(cdev, "Unable to loop back buffer to %s: %d\n",  in loopback_complete()
273 		ERROR(cdev, "%s loop complete --> %d, %d/%d\n", ep->name,  in loopback_complete()
286 		usb_ep_free_request(ep == loop->in_ep ?  in loopback_complete()
287 				    loop->out_ep : loop->in_ep,  in loopback_complete()
294 static void disable_loopback(struct f_loopback *loop)  in disable_loopback()  argument
298 	cdev = loop->function.config->cdev;  in disable_loopback()
299 	disable_endpoints(cdev, loop->in_ep, loop->out_ep, NULL, NULL);  in disable_loopback()
300 	VDBG(cdev, "%s disabled\n", loop->function.name);  in disable_loopback()
309 			  struct f_loopback *loop)  in alloc_requests()  argument
321 	for (i = 0; i < loop->qlen && result == 0; i++) {  in alloc_requests()
324 		in_req = usb_ep_alloc_request(loop->in_ep, GFP_ATOMIC);  in alloc_requests()
328 		out_req = lb_alloc_ep_req(loop->out_ep, loop->buflen);  in alloc_requests()
340 		result = usb_ep_queue(loop->out_ep, out_req, GFP_ATOMIC);  in alloc_requests()
343 					loop->out_ep->name, result);  in alloc_requests()
351 	free_ep_req(loop->out_ep, out_req);  in alloc_requests()
353 	usb_ep_free_request(loop->in_ep, in_req);  in alloc_requests()
359 			   struct f_loopback *loop, struct usb_ep *ep)  in enable_endpoint()  argument
363 	result = config_ep_by_speed(cdev->gadget, &(loop->function), ep);  in enable_endpoint()
370 	ep->driver_data = loop;  in enable_endpoint()
378 enable_loopback(struct usb_composite_dev *cdev, struct f_loopback *loop)  in enable_loopback()  argument
382 	result = enable_endpoint(cdev, loop, loop->in_ep);  in enable_loopback()
386 	result = enable_endpoint(cdev, loop, loop->out_ep);  in enable_loopback()
390 	result = alloc_requests(cdev, loop);  in enable_loopback()
394 	DBG(cdev, "%s enabled\n", loop->function.name);  in enable_loopback()
398 	usb_ep_disable(loop->out_ep);  in enable_loopback()
400 	usb_ep_disable(loop->in_ep);  in enable_loopback()
408 	struct f_loopback	*loop = func_to_loop(f);  in loopback_set_alt()  local
412 	disable_loopback(loop);  in loopback_set_alt()
413 	return enable_loopback(cdev, loop);  in loopback_set_alt()
418 	struct f_loopback	*loop = func_to_loop(f);  in loopback_disable()  local
420 	disable_loopback(loop);  in loopback_disable()
425 	struct f_loopback	*loop;  in loopback_alloc()  local
428 	loop = kzalloc(sizeof *loop, GFP_KERNEL);  in loopback_alloc()
429 	if (!loop)  in loopback_alloc()
438 	loop->buflen = lb_opts->bulk_buflen;  in loopback_alloc()
439 	loop->qlen = lb_opts->qlen;  in loopback_alloc()
440 	if (!loop->qlen)  in loopback_alloc()
441 		loop->qlen = 32;  in loopback_alloc()
443 	loop->function.name = "loopback";  in loopback_alloc()
444 	loop->function.bind = loopback_bind;  in loopback_alloc()
445 	loop->function.set_alt = loopback_set_alt;  in loopback_alloc()
446 	loop->function.disable = loopback_disable;  in loopback_alloc()
447 	loop->function.strings = loopback_strings;  in loopback_alloc()
449 	loop->function.free_func = lb_free_func;  in loopback_alloc()
451 	return &loop->function;  in loopback_alloc()