usb gadget: Add usb_endpoint_descriptor to be part of the struct usb_ep

index e5ac8a3..3458c61 100644
@@ -173,7 +173,9 @@ fail_1:
 
 static int __enable_ep(struct usb_ep *ep, struct usb_endpoint_descriptor *desc)
 {
-	int err = usb_ep_enable(ep, desc);
+	int err;
+	ep->desc = desc;
+	err = usb_ep_enable(ep);
 	ep->driver_data = dbgp.gadget;
 	return err;
 }

@@ -268,8 +270,8 @@ static int __init dbgp_configure_endpoints(struct usb_gadget *gadget)
 	dbgp.serial->in = dbgp.i_ep;
 	dbgp.serial->out = dbgp.o_ep;
 
-	dbgp.serial->in_desc = &i_desc;
-	dbgp.serial->out_desc = &o_desc;
+	dbgp.serial->in->desc = &i_desc;
+	dbgp.serial->out->desc = &o_desc;
 
 	if (gserial_setup(gadget, 1) < 0) {
 		stp = 3;

index bd6226c..d04b4a6 100644
@@ -62,7 +62,6 @@ struct f_acm {
 	struct acm_ep_descs		hs;
 
 	struct usb_ep			*notify;
-	struct usb_endpoint_descriptor	*notify_desc;
 	struct usb_request		*notify_req;
 
 	struct usb_cdc_line_coding	port_line_coding;	/* 8-N-1 etc */

@@ -405,11 +404,11 @@ static int acm_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
 			usb_ep_disable(acm->notify);
 		} else {
 			VDBG(cdev, "init acm ctrl interface %d\n", intf);
-			acm->notify_desc = ep_choose(cdev->gadget,
+			acm->notify->desc = ep_choose(cdev->gadget,
 					acm->hs.notify,
 					acm->fs.notify);
 		}
-		usb_ep_enable(acm->notify, acm->notify_desc);
+		usb_ep_enable(acm->notify);
 		acm->notify->driver_data = acm;
 
 	} else if (intf == acm->data_id) {

@@ -418,9 +417,9 @@ static int acm_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
 			gserial_disconnect(&acm->port);
 		} else {
 			DBG(cdev, "activate acm ttyGS%d\n", acm->port_num);
-			acm->port.in_desc = ep_choose(cdev->gadget,
+			acm->port.in->desc = ep_choose(cdev->gadget,
 					acm->hs.in, acm->fs.in);
-			acm->port.out_desc = ep_choose(cdev->gadget,
+			acm->port.out->desc = ep_choose(cdev->gadget,
 					acm->hs.out, acm->fs.out);
 		}
 		gserial_connect(&acm->port, acm->port_num);

index 00975ed..da562c4 100644
@@ -279,7 +279,6 @@ struct f_audio {
 
 	/* endpoints handle full and/or high speeds */
 	struct usb_ep			*out_ep;
-	struct usb_endpoint_descriptor	*out_desc;
 
 	spinlock_t			lock;
 	struct f_audio_buf *copy_buf;

@@ -575,7 +574,7 @@ static int f_audio_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
 
 	if (intf == 1) {
 		if (alt == 1) {
-			usb_ep_enable(out_ep, audio->out_desc);
+			usb_ep_enable(out_ep);
 			out_ep->driver_data = audio;
 			audio->copy_buf = f_audio_buffer_alloc(audio_buf_size);
 			if (IS_ERR(audio->copy_buf))

@@ -775,7 +774,7 @@ int __init audio_bind_config(struct usb_configuration *c)
 	audio->card.func.set_alt = f_audio_set_alt;
 	audio->card.func.setup = f_audio_setup;
 	audio->card.func.disable = f_audio_disable;
-	audio->out_desc = &as_out_ep_desc;
+	audio->out_ep->desc = &as_out_ep_desc;
 
 	control_selector_init(audio);
 

index 544257a..7c996f2 100644
@@ -68,7 +68,6 @@ struct f_ecm {
 	struct ecm_ep_descs		hs;
 
 	struct usb_ep			*notify;
-	struct usb_endpoint_descriptor	*notify_desc;
 	struct usb_request		*notify_req;
 	u8				notify_state;
 	bool				is_open;

@@ -466,11 +465,11 @@ static int ecm_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
 			usb_ep_disable(ecm->notify);
 		} else {
 			VDBG(cdev, "init ecm ctrl %d\n", intf);
-			ecm->notify_desc = ep_choose(cdev->gadget,
+			ecm->notify->desc = ep_choose(cdev->gadget,
 					ecm->hs.notify,
 					ecm->fs.notify);
 		}
-		usb_ep_enable(ecm->notify, ecm->notify_desc);
+		usb_ep_enable(ecm->notify);
 		ecm->notify->driver_data = ecm;
 
 	/* Data interface has two altsettings, 0 and 1 */

@@ -483,11 +482,11 @@ static int ecm_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
 			gether_disconnect(&ecm->port);
 		}
 
-		if (!ecm->port.in) {
+		if (!ecm->port.in_ep->desc) {
 			DBG(cdev, "init ecm\n");
-			ecm->port.in = ep_choose(cdev->gadget,
+			ecm->port.in_ep->desc = ep_choose(cdev->gadget,
 					ecm->hs.in, ecm->fs.in);
-			ecm->port.out = ep_choose(cdev->gadget,
+			ecm->port.out_ep->desc = ep_choose(cdev->gadget,
 					ecm->hs.out, ecm->fs.out);
 		}
 

@@ -549,7 +548,7 @@ static void ecm_disable(struct usb_function *f)
 	if (ecm->notify->driver_data) {
 		usb_ep_disable(ecm->notify);
 		ecm->notify->driver_data = NULL;
-		ecm->notify_desc = NULL;
+		ecm->notify->desc = NULL;
 	}
 }
 

@@ -723,9 +722,9 @@ fail:
 	/* we might as well release our claims on endpoints */
 	if (ecm->notify)
 		ecm->notify->driver_data = NULL;
-	if (ecm->port.out)
+	if (ecm->port.out_ep->desc)
 		ecm->port.out_ep->driver_data = NULL;
-	if (ecm->port.in)
+	if (ecm->port.in_ep->desc)
 		ecm->port.in_ep->driver_data = NULL;
 
 	ERROR(cdev, "%s: can't bind, err %d\n", f->name, status);

index 95dd466..099f98f 100644
@@ -176,11 +176,11 @@ static int eem_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
 			gether_disconnect(&eem->port);
 		}
 
-		if (!eem->port.in) {
+		if (!eem->port.in_ep->desc) {
 			DBG(cdev, "init eem\n");
-			eem->port.in = ep_choose(cdev->gadget,
+			eem->port.in_ep->desc = ep_choose(cdev->gadget,
 					eem->hs.in, eem->fs.in);
-			eem->port.out = ep_choose(cdev->gadget,
+			eem->port.out_ep->desc = ep_choose(cdev->gadget,
 					eem->hs.out, eem->fs.out);
 		}
 

@@ -289,9 +289,9 @@ fail:
 		usb_free_descriptors(f->descriptors);
 
 	/* we might as well release our claims on endpoints */
-	if (eem->port.out)
+	if (eem->port.out_ep->desc)
 		eem->port.out_ep->driver_data = NULL;
-	if (eem->port.in)
+	if (eem->port.in_ep->desc)
 		eem->port.in_ep->driver_data = NULL;
 
 	ERROR(cdev, "%s: can't bind, err %d\n", f->name, status);

index 4a830df..60d9a3f 100644
@@ -1560,7 +1560,8 @@ static int ffs_func_eps_enable(struct ffs_function *func)
 		ds = ep->descs[ep->descs[1] ? 1 : 0];
 
 		ep->ep->driver_data = ep;
-		ret = usb_ep_enable(ep->ep, ds);
+		ep->ep->desc = ds;
+		ret = usb_ep_enable(ep->ep);
 		if (likely(!ret)) {
 			epfile->ep = ep;
 			epfile->in = usb_endpoint_dir_in(ds);

index 4f891ed..c08a82c 100644
@@ -417,7 +417,6 @@ static int hidg_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
 {
 	struct usb_composite_dev		*cdev = f->config->cdev;
 	struct f_hidg				*hidg = func_to_hidg(f);
-	const struct usb_endpoint_descriptor	*ep_desc;
 	int status = 0;
 
 	VDBG(cdev, "hidg_set_alt intf:%d alt:%d\n", intf, alt);

@@ -427,9 +426,9 @@ static int hidg_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
 		if (hidg->in_ep->driver_data != NULL)
 			usb_ep_disable(hidg->in_ep);
 
-		ep_desc = ep_choose(f->config->cdev->gadget,
+		hidg->in_ep->desc = ep_choose(f->config->cdev->gadget,
 				hidg->hs_in_ep_desc, hidg->fs_in_ep_desc);
-		status = usb_ep_enable(hidg->in_ep, ep_desc);
+		status = usb_ep_enable(hidg->in_ep);
 		if (status < 0) {
 			ERROR(cdev, "Enable endpoint FAILED!\n");
 			goto fail;

index b37960f..34e3cca 100644
@@ -250,26 +250,24 @@ static int
 enable_loopback(struct usb_composite_dev *cdev, struct f_loopback *loop)
 {
 	int					result = 0;
-	const struct usb_endpoint_descriptor	*src, *sink;
 	struct usb_ep				*ep;
 	struct usb_request			*req;
 	unsigned				i;
 
-	src = ep_choose(cdev->gadget,
-			&hs_loop_source_desc, &fs_loop_source_desc);
-	sink = ep_choose(cdev->gadget,
-			&hs_loop_sink_desc, &fs_loop_sink_desc);
-
 	/* one endpoint writes data back IN to the host */
 	ep = loop->in_ep;
-	result = usb_ep_enable(ep, src);
+	ep->desc = ep_choose(cdev->gadget,
+			&hs_loop_source_desc, &fs_loop_source_desc);
+	result = usb_ep_enable(ep);
 	if (result < 0)
 		return result;
 	ep->driver_data = loop;
 
 	/* one endpoint just reads OUT packets */
 	ep = loop->out_ep;
-	result = usb_ep_enable(ep, sink);
+	ep->desc = ep_choose(cdev->gadget,
+			&hs_loop_sink_desc, &fs_loop_sink_desc);
+	result = usb_ep_enable(ep);
 	if (result < 0) {
 fail0:
 		ep = loop->in_ep;

index 838286b..c0ce4c2 100644
@@ -2318,7 +2318,8 @@ static int enable_endpoint(struct fsg_common *common, struct usb_ep *ep,
 	int	rc;
 
 	ep->driver_data = common;
-	rc = usb_ep_enable(ep, d);
+	ep->desc = (struct usb_endpoint_descriptor *)d;
+	rc = usb_ep_enable(ep);
 	if (rc)
 		ERROR(common, "can't enable %s, result %d\n", ep->name, rc);
 	return rc;

index 8f8c643..a6dbda0 100644
@@ -227,11 +227,11 @@ static int obex_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
 			gserial_disconnect(&obex->port);
 		}
 
-		if (!obex->port.in_desc) {
+		if (!obex->port.in->desc) {
 			DBG(cdev, "init obex ttyGS%d\n", obex->port_num);
-			obex->port.in_desc = ep_choose(cdev->gadget,
+			obex->port.in->desc = ep_choose(cdev->gadget,
 					obex->hs.obex_in, obex->fs.obex_in);
-			obex->port.out_desc = ep_choose(cdev->gadget,
+			obex->port.out->desc = ep_choose(cdev->gadget,
 					obex->hs.obex_out, obex->fs.obex_out);
 		}
 

index 3c6e1a0..c6c27df 100644
@@ -422,17 +422,16 @@ static int pn_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
 		spin_lock(&port->lock);
 		__pn_reset(f);
 		if (alt == 1) {
-			struct usb_endpoint_descriptor *out, *in;
 			int i;
 
-			out = ep_choose(gadget,
+			fp->out_ep->desc = ep_choose(gadget,
 					&pn_hs_sink_desc,
 					&pn_fs_sink_desc);
-			in = ep_choose(gadget,
+			fp->in_ep->desc = ep_choose(gadget,
 					&pn_hs_source_desc,
 					&pn_fs_source_desc);
-			usb_ep_enable(fp->out_ep, out);
-			usb_ep_enable(fp->in_ep, in);
+			usb_ep_enable(fp->out_ep);
+			usb_ep_enable(fp->in_ep);
 
 			port->usb = fp;
 			fp->out_ep->driver_data = fp;

index 882484a..2066f7c 100644
@@ -92,7 +92,6 @@ struct f_rndis {
 	struct rndis_ep_descs		hs;
 
 	struct usb_ep			*notify;
-	struct usb_endpoint_descriptor	*notify_desc;
 	struct usb_request		*notify_req;
 	atomic_t			notify_count;
 };

@@ -487,11 +486,11 @@ static int rndis_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
 			usb_ep_disable(rndis->notify);
 		} else {
 			VDBG(cdev, "init rndis ctrl %d\n", intf);
-			rndis->notify_desc = ep_choose(cdev->gadget,
+			rndis->notify->desc = ep_choose(cdev->gadget,
 					rndis->hs.notify,
 					rndis->fs.notify);
 		}
-		usb_ep_enable(rndis->notify, rndis->notify_desc);
+		usb_ep_enable(rndis->notify);
 		rndis->notify->driver_data = rndis;
 
 	} else if (intf == rndis->data_id) {

@@ -502,11 +501,11 @@ static int rndis_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
 			gether_disconnect(&rndis->port);
 		}
 
-		if (!rndis->port.in) {
+		if (!rndis->port.in_ep->desc) {
 			DBG(cdev, "init rndis\n");
-			rndis->port.in = ep_choose(cdev->gadget,
+			rndis->port.in_ep->desc = ep_choose(cdev->gadget,
 					rndis->hs.in, rndis->fs.in);
-			rndis->port.out = ep_choose(cdev->gadget,
+			rndis->port.out_ep->desc = ep_choose(cdev->gadget,
 					rndis->hs.out, rndis->fs.out);
 		}
 

@@ -739,9 +738,9 @@ fail:
 	/* we might as well release our claims on endpoints */
 	if (rndis->notify)
 		rndis->notify->driver_data = NULL;
-	if (rndis->port.out)
+	if (rndis->port.out_ep->desc)
 		rndis->port.out_ep->driver_data = NULL;
-	if (rndis->port.in)
+	if (rndis->port.in_ep->desc)
 		rndis->port.in_ep->driver_data = NULL;
 
 	ERROR(cdev, "%s: can't bind, err %d\n", f->name, status);

index 490b00b..a9ce626 100644
@@ -138,9 +138,9 @@ static int gser_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
 		gserial_disconnect(&gser->port);
 	} else {
 		DBG(cdev, "activate generic ttyGS%d\n", gser->port_num);
-		gser->port.in_desc = ep_choose(cdev->gadget,
+		gser->port.in->desc = ep_choose(cdev->gadget,
 				gser->hs.in, gser->fs.in);
-		gser->port.out_desc = ep_choose(cdev->gadget,
+		gser->port.out->desc = ep_choose(cdev->gadget,
 				gser->hs.out, gser->fs.out);
 	}
 	gserial_connect(&gser->port, gser->port_num);

index e403a53..0ffddd3 100644
@@ -343,15 +343,12 @@ static int
 enable_source_sink(struct usb_composite_dev *cdev, struct f_sourcesink *ss)
 {
 	int					result = 0;
-	const struct usb_endpoint_descriptor	*src, *sink;
 	struct usb_ep				*ep;
 
-	src = ep_choose(cdev->gadget, &hs_source_desc, &fs_source_desc);
-	sink = ep_choose(cdev->gadget, &hs_sink_desc, &fs_sink_desc);
-
 	/* one endpoint writes (sources) zeroes IN (to the host) */
 	ep = ss->in_ep;
-	result = usb_ep_enable(ep, src);
+	ep->desc = ep_choose(cdev->gadget, &hs_source_desc, &fs_source_desc);
+	result = usb_ep_enable(ep);
 	if (result < 0)
 		return result;
 	ep->driver_data = ss;

@@ -367,7 +364,8 @@ fail:
 
 	/* one endpoint reads (sinks) anything OUT (from the host) */
 	ep = ss->out_ep;
-	result = usb_ep_enable(ep, sink);
+	ep->desc = ep_choose(cdev->gadget, &hs_sink_desc, &fs_sink_desc);
+	result = usb_ep_enable(ep);
 	if (result < 0)
 		goto fail;
 	ep->driver_data = ss;

index 8675ca4..aecaed1 100644
@@ -243,9 +243,9 @@ static int geth_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
 	}
 
 	DBG(cdev, "init + activate cdc subset\n");
-	geth->port.in = ep_choose(cdev->gadget,
+	geth->port.in_ep->desc = ep_choose(cdev->gadget,
 			geth->hs.in, geth->fs.in);
-	geth->port.out = ep_choose(cdev->gadget,
+	geth->port.out_ep->desc = ep_choose(cdev->gadget,
 			geth->hs.out, geth->fs.out);
 
 	net = gether_connect(&geth->port);

@@ -334,9 +334,9 @@ geth_bind(struct usb_configuration *c, struct usb_function *f)
 
 fail:
 	/* we might as well release our claims on endpoints */
-	if (geth->port.out)
+	if (geth->port.out_ep->desc)
 		geth->port.out_ep->driver_data = NULL;
-	if (geth->port.in)
+	if (geth->port.in_ep->desc)
 		geth->port.in_ep->driver_data = NULL;
 
 	ERROR(cdev, "%s: can't bind, err %d\n", f->name, status);

index be446b7..df74d03 100644
@@ -262,8 +262,10 @@ uvc_function_set_alt(struct usb_function *f, unsigned interface, unsigned alt)
 		if (uvc->state != UVC_STATE_CONNECTED)
 			return 0;
 
-		if (uvc->video.ep)
-			usb_ep_enable(uvc->video.ep, &uvc_streaming_ep);
+		if (uvc->video.ep) {
+			uvc->video.ep->desc = &uvc_streaming_ep;
+			usb_ep_enable(uvc->video.ep);
+		}
 
 		memset(&v4l2_event, 0, sizeof(v4l2_event));
 		v4l2_event.type = UVC_EVENT_STREAMON;

index d4fdf65..5d404d2 100644
@@ -2742,7 +2742,8 @@ static int enable_endpoint(struct fsg_dev *fsg, struct usb_ep *ep,
 	int	rc;
 
 	ep->driver_data = fsg;
-	rc = usb_ep_enable(ep, d);
+	ep->desc = d;
+	rc = usb_ep_enable(ep);
 	if (rc)
 		ERROR(fsg, "can't enable %s, result %d\n", ep->name, rc);
 	return rc;

index 0ab7e14..1d0435f 100644
@@ -537,14 +537,16 @@ static int set_gmidi_config(struct gmidi_device *dev, gfp_t gfp_flags)
 	struct usb_ep *ep;
 	unsigned i;
 
-	err = usb_ep_enable(dev->in_ep, &bulk_in_desc);
+	dev->in_ep->desc = &bulk_in_desc;
+	err = usb_ep_enable(dev->in_ep);
 	if (err) {
 		ERROR(dev, "can't start %s: %d\n", dev->in_ep->name, err);
 		goto fail;
 	}
 	dev->in_ep->driver_data = dev;
 
-	err = usb_ep_enable(dev->out_ep, &bulk_out_desc);
+	dev->out_ep->desc = &bulk_out_desc;
+	err = usb_ep_enable(dev->out_ep);
 	if (err) {
 		ERROR(dev, "can't start %s: %d\n", dev->out_ep->name, err);
 		goto fail;

index 3ed73f4..565e201 100644
@@ -828,14 +828,16 @@ ep_config (struct file *fd, const char __user *buf, size_t len, loff_t *ptr)
 	switch (data->dev->gadget->speed) {
 	case USB_SPEED_LOW:
 	case USB_SPEED_FULL:
-		value = usb_ep_enable (ep, &data->desc);
+		ep->desc = &data->desc;
+		value = usb_ep_enable(ep);
 		if (value == 0)
 			data->state = STATE_EP_ENABLED;
 		break;
 #ifdef	CONFIG_USB_GADGET_DUALSPEED
 	case USB_SPEED_HIGH:
 		/* fails if caller didn't provide that descriptor... */
-		value = usb_ep_enable (ep, &data->hs_desc);
+		ep->desc = &data->hs_desc;
+		value = usb_ep_enable(ep);
 		if (value == 0)
 			data->state = STATE_EP_ENABLED;
 		break;

index 2fc8636..5769ded 100644
@@ -89,8 +89,7 @@ struct printer_dev {
 	u8			config;
 	s8			interface;
 	struct usb_ep		*in_ep, *out_ep;
-	const struct usb_endpoint_descriptor
-				*in, *out;
+
 	struct list_head	rx_reqs;	/* List of free RX structs */
 	struct list_head	rx_reqs_active;	/* List of Active RX xfers */
 	struct list_head	rx_buffers;	/* List of completed xfers */

@@ -895,19 +894,20 @@ set_printer_interface(struct printer_dev *dev)
 {
 	int			result = 0;
 
-	dev->in = ep_desc(dev->gadget, &hs_ep_in_desc, &fs_ep_in_desc);
+	dev->in_ep->desc = ep_desc(dev->gadget, &hs_ep_in_desc, &fs_ep_in_desc);
 	dev->in_ep->driver_data = dev;
 
-	dev->out = ep_desc(dev->gadget, &hs_ep_out_desc, &fs_ep_out_desc);
+	dev->out_ep->desc = ep_desc(dev->gadget, &hs_ep_out_desc,
+				    &fs_ep_out_desc);
 	dev->out_ep->driver_data = dev;
 
-	result = usb_ep_enable(dev->in_ep, dev->in);
+	result = usb_ep_enable(dev->in_ep);
 	if (result != 0) {
 		DBG(dev, "enable %s --> %d\n", dev->in_ep->name, result);
 		goto done;
 	}
 
-	result = usb_ep_enable(dev->out_ep, dev->out);
+	result = usb_ep_enable(dev->out_ep);
 	if (result != 0) {
 		DBG(dev, "enable %s --> %d\n", dev->in_ep->name, result);
 		goto done;

@@ -918,8 +918,8 @@ done:
 	if (result != 0) {
 		(void) usb_ep_disable(dev->in_ep);
 		(void) usb_ep_disable(dev->out_ep);
-		dev->in = NULL;
-		dev->out = NULL;
+		dev->in_ep->desc = NULL;
+		dev->out_ep->desc = NULL;
 	}
 
 	/* caller is responsible for cleanup on error */

@@ -933,12 +933,14 @@ static void printer_reset_interface(struct printer_dev *dev)
 
 	DBG(dev, "%s\n", __func__);
 
-	if (dev->in)
+	if (dev->in_ep->desc)
 		usb_ep_disable(dev->in_ep);
 
-	if (dev->out)
+	if (dev->out_ep->desc)
 		usb_ep_disable(dev->out_ep);
 
+	dev->in_ep->desc = NULL;
+	dev->out_ep->desc = NULL;
 	dev->interface = -1;
 }
 

@@ -1104,9 +1106,9 @@ static void printer_soft_reset(struct printer_dev *dev)
 		list_add(&req->list, &dev->tx_reqs);
 	}
 
-	if (usb_ep_enable(dev->in_ep, dev->in))
+	if (usb_ep_enable(dev->in_ep))
 		DBG(dev, "Failed to enable USB in_ep\n");
-	if (usb_ep_enable(dev->out_ep, dev->out))
+	if (usb_ep_enable(dev->out_ep))
 		DBG(dev, "Failed to enable USB out_ep\n");
 
 	wake_up_interruptible(&dev->rx_wait);

index cb23355..580c4b0 100644
@@ -683,8 +683,8 @@ static int eth_stop(struct net_device *net)
 		usb_ep_disable(link->out_ep);
 		if (netif_carrier_ok(net)) {
 			DBG(dev, "host still using in/out endpoints\n");
-			usb_ep_enable(link->in_ep, link->in);
-			usb_ep_enable(link->out_ep, link->out);
+			usb_ep_enable(link->in_ep);
+			usb_ep_enable(link->out_ep);
 		}
 	}
 	spin_unlock_irqrestore(&dev->lock, flags);

@@ -864,7 +864,7 @@ struct net_device *gether_connect(struct gether *link)
 		return ERR_PTR(-EINVAL);
 
 	link->in_ep->driver_data = dev;
-	result = usb_ep_enable(link->in_ep, link->in);
+	result = usb_ep_enable(link->in_ep);
 	if (result != 0) {
 		DBG(dev, "enable %s --> %d\n",
 			link->in_ep->name, result);

@@ -872,7 +872,7 @@ struct net_device *gether_connect(struct gether *link)
 	}
 
 	link->out_ep->driver_data = dev;
-	result = usb_ep_enable(link->out_ep, link->out);
+	result = usb_ep_enable(link->out_ep);
 	if (result != 0) {
 		DBG(dev, "enable %s --> %d\n",
 			link->out_ep->name, result);

@@ -962,7 +962,7 @@ void gether_disconnect(struct gether *link)
 	}
 	spin_unlock(&dev->req_lock);
 	link->in_ep->driver_data = NULL;
-	link->in = NULL;
+	link->in_ep->desc = NULL;
 
 	usb_ep_disable(link->out_ep);
 	spin_lock(&dev->req_lock);

@@ -977,7 +977,7 @@ void gether_disconnect(struct gether *link)
 	}
 	spin_unlock(&dev->req_lock);
 	link->out_ep->driver_data = NULL;
-	link->out = NULL;
+	link->out_ep->desc = NULL;
 
 	/* finish forgetting about this USB link episode */
 	dev->header_len = 0;

index 3c8c0c9..5a8b5c4 100644
@@ -52,10 +52,6 @@ struct gether {
 	struct usb_ep			*in_ep;
 	struct usb_ep			*out_ep;
 
-	/* descriptors match device speed at gether_connect() time */
-	struct usb_endpoint_descriptor	*in;
-	struct usb_endpoint_descriptor	*out;
-
 	bool				is_zlp_ok;
 
 	u16				cdc_filter;

index 01e5354..b090ce2 100644
@@ -1225,12 +1225,12 @@ int gserial_connect(struct gserial *gser, u8 port_num)
 	port = ports[port_num].port;
 
 	/* activate the endpoints */
-	status = usb_ep_enable(gser->in, gser->in_desc);
+	status = usb_ep_enable(gser->in);
 	if (status < 0)
 		return status;
 	gser->in->driver_data = port;
 
-	status = usb_ep_enable(gser->out, gser->out_desc);
+	status = usb_ep_enable(gser->out);
 	if (status < 0)
 		goto fail_out;
 	gser->out->driver_data = port;

index 300f0ed..9b0fe64 100644
@@ -35,8 +35,6 @@ struct gserial {
 
 	struct usb_ep			*in;
 	struct usb_ep			*out;
-	struct usb_endpoint_descriptor	*in_desc;
-	struct usb_endpoint_descriptor	*out_desc;
 
 	/* REVISIT avoid this CDC-ACM support harder ... */
 	struct usb_cdc_line_coding port_line_coding;	/* 9600-8-N-1 etc */

index 006412c..937c8fa 100644
@@ -131,20 +131,22 @@ struct usb_ep_ops {
  * @maxpacket:The maximum packet size used on this endpoint.  The initial
  *	value can sometimes be reduced (hardware allowing), according to
  *      the endpoint descriptor used to configure the endpoint.
- * @driver_data:for use by the gadget driver.  all other fields are
- *	read-only to gadget drivers.
+ * @driver_data:for use by the gadget driver.
+ * @desc: endpoint descriptor.  This pointer is set before the endpoint is
+ *	enabled and remains valid until the endpoint is disabled.
  *
  * the bus controller driver lists all the general purpose endpoints in
  * gadget->ep_list.  the control endpoint (gadget->ep0) is not in that list,
  * and is accessed only in response to a driver setup() callback.
  */
 struct usb_ep {
-	void			*driver_data;
+	void				*driver_data;
 
-	const char		*name;
-	const struct usb_ep_ops	*ops;
-	struct list_head	ep_list;
-	unsigned		maxpacket:16;
+	const char			*name;
+	const struct usb_ep_ops		*ops;
+	struct list_head		ep_list;
+	unsigned			maxpacket:16;
+	const struct usb_endpoint_descriptor	*desc;
 };
 
 /*-------------------------------------------------------------------------*/

@@ -153,11 +155,8 @@ struct usb_ep {
  * usb_ep_enable - configure endpoint, making it usable
  * @ep:the endpoint being configured.  may not be the endpoint named "ep0".
  *	drivers discover endpoints through the ep_list of a usb_gadget.
- * @desc:descriptor for desired behavior.  caller guarantees this pointer
- *	remains valid until the endpoint is disabled; the data byte order
- *	is little-endian (usb-standard).
  *
- * when configurations are set, or when interface settings change, the driver
+ * When configurations are set, or when interface settings change, the driver
  * will enable or disable the relevant endpoints.  while it is enabled, an
  * endpoint may be used for i/o until the driver receives a disconnect() from
  * the host or until the endpoint is disabled.

@@ -172,10 +171,9 @@ struct usb_ep {
  *
  * returns zero, or a negative error code.
  */
-static inline int usb_ep_enable(struct usb_ep *ep,
-				const struct usb_endpoint_descriptor *desc)
+static inline int usb_ep_enable(struct usb_ep *ep)
 {
-	return ep->ops->enable(ep, desc);
+	return ep->ops->enable(ep, ep->desc);
 }
 
 /**