Use usb_otg_descriptor_add to allocate and initialize usb_otg_descriptor, free it while composite unbind. Signed-off-by: Li Jun <jun.li@xxxxxxxxxxxxx> --- drivers/usb/gadget/legacy/g_ffs.c | 34 +++++++++++++++++++--------------- 1 file changed, 19 insertions(+), 15 deletions(-) diff --git a/drivers/usb/gadget/legacy/g_ffs.c b/drivers/usb/gadget/legacy/g_ffs.c index 7b9ef7e..f607bbe 100644 --- a/drivers/usb/gadget/legacy/g_ffs.c +++ b/drivers/usb/gadget/legacy/g_ffs.c @@ -88,21 +88,7 @@ MODULE_PARM_DESC(bDeviceProtocol, "USB Device protocol"); module_param_array_named(functions, func_names, charp, &func_num, 0); MODULE_PARM_DESC(functions, "USB Functions list"); -static const struct usb_descriptor_header *gfs_otg_desc[] = { - (const struct usb_descriptor_header *) - &(const struct usb_otg_descriptor) { - .bLength = sizeof(struct usb_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, - }, - - NULL -}; +static const struct usb_descriptor_header *gfs_otg_desc[2]; /* String IDs are assigned dynamically */ static struct usb_string gfs_strings[] = { @@ -471,6 +457,9 @@ static int gfs_unbind(struct usb_composite_dev *cdev) for (i = 0; i < N_CONF * func_num; ++i) usb_put_function(*(f_ffs[0] + i)); + kfree(gfs_otg_desc[0]); + gfs_otg_desc[0] = NULL; + return 0; } @@ -489,6 +478,21 @@ static int gfs_do_config(struct usb_configuration *c) return -ENODEV; if (gadget_is_otg(c->cdev->gadget)) { + if (!gfs_otg_desc[0]) { + struct usb_descriptor_header *usb_desc; + unsigned length; + + if (c->cdev->gadget->otg_rev >= 0x0200) + length = sizeof(struct usb_otg20_descriptor); + else + length = sizeof(struct usb_otg_descriptor); + usb_desc = kzalloc(length, GFP_KERNEL); + if (!usb_desc) + return -ENOMEM; + usb_otg_descriptor_init(c->cdev->gadget, usb_desc); + gfs_otg_desc[0] = usb_desc; + gfs_otg_desc[1] = NULL; + } c->descriptors = gfs_otg_desc; c->bmAttributes |= USB_CONFIG_ATT_WAKEUP; } -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html