Linux-libre 4.3.2-gnu

1 files changed, 19 insertions, 16 deletions

diff --git a/drivers/usb/gadget/legacy/cdc2.c b/drivers/usb/gadget/legacy/cdc2.c
index afd3e3792..ecd8c8d62 100644
--- a/drivers/usb/gadget/legacy/cdc2.c
+++ b/drivers/usb/gadget/legacy/cdc2.c
@@ -60,21 +60,7 @@ static struct usb_device_descriptor device_desc = {
 	.bNumConfigurations =	1,
 };
 
-static struct usb_otg_descriptor otg_descriptor = {
-	.bLength =		sizeof otg_descriptor,
-	.bDescriptorType =	USB_DT_OTG,
-
-	/* REVISIT SRP-only hardware is possible, although
-	 * it would not be called "OTG" ...
-	 */
-	.bmAttributes =		USB_OTG_SRP | USB_OTG_HNP,
-};
-
-static const struct usb_descriptor_header *otg_desc[] = {
-	(struct usb_descriptor_header *) &otg_descriptor,
-	NULL,
-};
-
+static const struct usb_descriptor_header *otg_desc[2];
 
 /* string IDs are assigned dynamically */
 static struct usb_string strings_dev[] = {
@@ -193,10 +179,21 @@ static int cdc_bind(struct usb_composite_dev *cdev)
 	device_desc.iManufacturer = strings_dev[USB_GADGET_MANUFACTURER_IDX].id;
 	device_desc.iProduct = strings_dev[USB_GADGET_PRODUCT_IDX].id;
 
+	if (gadget_is_otg(gadget) && !otg_desc[0]) {
+		struct usb_descriptor_header *usb_desc;
+
+		usb_desc = usb_otg_descriptor_alloc(gadget);
+		if (!usb_desc)
+			goto fail1;
+		usb_otg_descriptor_init(gadget, usb_desc);
+		otg_desc[0] = usb_desc;
+		otg_desc[1] = NULL;
+	}
+
 	/* register our configuration */
 	status = usb_add_config(cdev, &cdc_config_driver, cdc_do_config);
 	if (status < 0)
-		goto fail1;
+		goto fail2;
 
 	usb_composite_overwrite_options(cdev, &coverwrite);
 	dev_info(&gadget->dev, "%s, version: " DRIVER_VERSION "\n",
@@ -204,6 +201,9 @@ static int cdc_bind(struct usb_composite_dev *cdev)
 
 	return 0;
 
+fail2:
+	kfree(otg_desc[0]);
+	otg_desc[0] = NULL;
 fail1:
 	usb_put_function_instance(fi_serial);
 fail:
@@ -219,6 +219,9 @@ static int cdc_unbind(struct usb_composite_dev *cdev)
 		usb_put_function(f_ecm);
 	if (!IS_ERR_OR_NULL(fi_ecm))
 		usb_put_function_instance(fi_ecm);
+	kfree(otg_desc[0]);
+	otg_desc[0] = NULL;
+
 	return 0;
 }