USB: gadget: usb function sourcesink and loopback support usb configfs

index ae41f556eb75..9900baa31c2d 100644
@@ -583,16 +583,16 @@ static struct usb_function_instance *loopback_alloc_instance(void)
 
 	return  &lb_opts->func_inst;
 }
-DECLARE_USB_FUNCTION(Loopback, loopback_alloc_instance, loopback_alloc);
+DECLARE_USB_FUNCTION(loopback, loopback_alloc_instance, loopback_alloc);
 
 int __init lb_modinit(void)
 {
-	return usb_function_register(&Loopbackusb_func);
+	return usb_function_register(&loopbackusb_func);
 }
 
 void __exit lb_modexit(void)
 {
-	usb_function_unregister(&Loopbackusb_func);
+	usb_function_unregister(&loopbackusb_func);
 }
 
 MODULE_LICENSE("GPL");

index 6803cd60cc6d..fc879b785ed0 100644
@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0+
 /*
- * f_sourcesink.c - USB peripheral source/sink configuration driver
+ * f_sourcesink.c - USB peripheral sourcesink configuration driver
  *
  * Copyright (C) 2003-2008 David Brownell
  * Copyright (C) 2008 by Nokia Corporation

@@ -19,7 +19,7 @@
 #include "u_f.h"
 
 /*
- * SOURCE/SINK FUNCTION ... a primary testing vehicle for USB peripheral
+ * SOURCESINK FUNCTION ... a primary testing vehicle for USB peripheral
  * controller drivers.
  *
  * This just sinks bulk packets OUT to the peripheral and sources them IN

@@ -460,7 +460,7 @@ sourcesink_free_func(struct usb_function *f)
 	kfree(func_to_ss(f));
 }
 
-/* optionally require specific source/sink data patterns  */
+/* optionally require specific sourcesink data patterns  */
 static int check_read_data(struct f_sourcesink *ss, struct usb_request *req)
 {
 	unsigned		i;

@@ -818,14 +818,14 @@ static int sourcesink_setup(struct usb_function *f,
 
 	/* respond with data transfer or status phase? */
 	if (value >= 0) {
-		VDBG(c->cdev, "source/sink req%02x.%02x v%04x i%04x l%d\n",
+		VDBG(c->cdev, "sourcesink req%02x.%02x v%04x i%04x l%d\n",
 			ctrl->bRequestType, ctrl->bRequest,
 			w_value, w_index, w_length);
 		req->zero = 0;
 		req->length = value;
 		value = usb_ep_queue(c->cdev->gadget->ep0, req, GFP_ATOMIC);
 		if (value < 0)
-			ERROR(c->cdev, "source/sink response, err %d\n",
+			ERROR(c->cdev, "sourcesink response, err %d\n",
 					value);
 	}
 

@@ -858,7 +858,7 @@ static struct usb_function *source_sink_alloc_func(
 	ss->bulk_qlen = ss_opts->bulk_qlen;
 	ss->iso_qlen = ss_opts->iso_qlen;
 
-	ss->function.name = "source/sink";
+	ss->function.name = "sourcesink";
 	ss->function.bind = sourcesink_bind;
 	ss->function.set_alt = sourcesink_set_alt;
 	ss->function.get_alt = sourcesink_get_alt;

@@ -1263,24 +1263,24 @@ static struct usb_function_instance *source_sink_alloc_inst(void)
 
 	return &ss_opts->func_inst;
 }
-DECLARE_USB_FUNCTION(SourceSink, source_sink_alloc_inst,
+DECLARE_USB_FUNCTION(sourcesink, source_sink_alloc_inst,
 		source_sink_alloc_func);
 
 static int __init sslb_modinit(void)
 {
 	int ret;
 
-	ret = usb_function_register(&SourceSinkusb_func);
+	ret = usb_function_register(&sourcesinkusb_func);
 	if (ret)
 		return ret;
 	ret = lb_modinit();
 	if (ret)
-		usb_function_unregister(&SourceSinkusb_func);
+		usb_function_unregister(&sourcesinkusb_func);
 	return ret;
 }
 static void __exit sslb_modexit(void)
 {
-	usb_function_unregister(&SourceSinkusb_func);
+	usb_function_unregister(&sourcesinkusb_func);
 	lb_modexit();
 }
 module_init(sslb_modinit);

index 23312a07efb4..0cddd20e54ff 100644
@@ -222,7 +222,7 @@ static int ss_config_setup(struct usb_configuration *c,
 }
 
 static struct usb_configuration sourcesink_driver = {
-	.label                  = "source/sink",
+	.label                  = "sourcesink",
 	.setup                  = ss_config_setup,
 	.bConfigurationValue    = 3,
 	.bmAttributes           = USB_CONFIG_ATT_SELFPOWER,

@@ -282,7 +282,7 @@ static int zero_bind(struct usb_composite_dev *cdev)
 	autoresume_cdev = cdev;
 	timer_setup(&autoresume_timer, zero_autoresume, 0);
 
-	func_inst_ss = usb_get_function_instance("SourceSink");
+	func_inst_ss = usb_get_function_instance("sourcesink");
 	if (IS_ERR(func_inst_ss))
 		return PTR_ERR(func_inst_ss);
 

@@ -302,7 +302,7 @@ static int zero_bind(struct usb_composite_dev *cdev)
 		goto err_put_func_inst_ss;
 	}
 
-	func_inst_lb = usb_get_function_instance("Loopback");
+	func_inst_lb = usb_get_function_instance("loopback");
 	if (IS_ERR(func_inst_lb)) {
 		status = PTR_ERR(func_inst_lb);
 		goto err_put_func_ss;