From d867889797615761975e693881a12283ebc92b0f Mon Sep 17 00:00:00 2001 From: Li Jun Date: Thu, 9 Jul 2015 15:18:55 +0800 Subject: [PATCH] usb: gadget: mass_storage: allocate and init otg descriptor by otg capabilities Allocate and initialize usb otg descriptor according to gadget otg capabilities, add it for each usb configurations. If otg capability is not defined, keep its original otg descriptor unchanged. Signed-off-by: Li Jun Reviewed-by: Roger Quadros Signed-off-by: Felipe Balbi --- drivers/usb/gadget/legacy/mass_storage.c | 35 +++++++++++++----------- 1 file changed, 19 insertions(+), 16 deletions(-) diff --git a/drivers/usb/gadget/legacy/mass_storage.c b/drivers/usb/gadget/legacy/mass_storage.c index e7bfb081f111..ab1a42ce75d2 100644 --- a/drivers/usb/gadget/legacy/mass_storage.c +++ b/drivers/usb/gadget/legacy/mass_storage.c @@ -64,21 +64,7 @@ static struct usb_device_descriptor msg_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]; static struct usb_string strings_dev[] = { [USB_GADGET_MANUFACTURER_IDX].s = "", @@ -214,9 +200,20 @@ static int msg_bind(struct usb_composite_dev *cdev) goto fail_string_ids; msg_device_desc.iProduct = strings_dev[USB_GADGET_PRODUCT_IDX].id; + if (gadget_is_otg(cdev->gadget) && !otg_desc[0]) { + struct usb_descriptor_header *usb_desc; + + usb_desc = usb_otg_descriptor_alloc(cdev->gadget); + if (!usb_desc) + goto fail_string_ids; + usb_otg_descriptor_init(cdev->gadget, usb_desc); + otg_desc[0] = usb_desc; + otg_desc[1] = NULL; + } + status = usb_add_config(cdev, &msg_config_driver, msg_do_config); if (status < 0) - goto fail_string_ids; + goto fail_otg_desc; usb_composite_overwrite_options(cdev, &coverwrite); dev_info(&cdev->gadget->dev, @@ -224,6 +221,9 @@ static int msg_bind(struct usb_composite_dev *cdev) set_bit(0, &msg_registered); return 0; +fail_otg_desc: + kfree(otg_desc[0]); + otg_desc[0] = NULL; fail_string_ids: fsg_common_remove_luns(opts->common); fail_set_cdev: @@ -243,6 +243,9 @@ static int msg_unbind(struct usb_composite_dev *cdev) if (!IS_ERR(fi_msg)) usb_put_function_instance(fi_msg); + kfree(otg_desc[0]); + otg_desc[0] = NULL; + return 0; } -- 2.20.1