These changes are the raw update to linux-4.4.6-rt14. Kernel sources

[kvmfornfv.git] / kernel / drivers / usb / gadget / legacy / cdc2.c

diff --git a/kernel/drivers/usb/gadget/legacy/cdc2.c b/kernel/drivers/usb/gadget/legacy/cdc2.c
index afd3e37..ecd8c8d 100644 (file)
--- a/kernel/drivers/usb/gadget/legacy/cdc2.c
+++ b/kernel/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;
 }