USB_COMP_EP0_BUFSIZ
if (w_length > USB_COMP_EP0_BUFSIZ) {
*temp = cpu_to_le16(USB_COMP_EP0_BUFSIZ);
w_length = USB_COMP_EP0_BUFSIZ;
cdev->req->buf = kzalloc(USB_COMP_EP0_BUFSIZ, GFP_KERNEL);
len = USB_COMP_EP0_BUFSIZ - USB_DT_CONFIG_SIZE;
req->length = USB_COMP_EP0_BUFSIZ;