LXR linux/drivers/usb/gadget/u

   1// SPDX-License-Identifier: GPL-2.0
   2/*
   3 * u_f.c -- USB function utilities for Gadget stack
   4 *
   5 * Copyright (c) 2013 Samsung Electronics Co., Ltd.
   6 *              http://www.samsung.com
   7 *
   8 * Author: Andrzej Pietrasiewicz <andrzejtp2010@gmail.com>
   9 */
  10
  11#include "u_f.h"
  12#include <linux/usb/ch9.h>
  13
  14struct usb_request *alloc_ep_req(struct usb_ep *ep, size_t len)
  15{
  16        struct usb_request      *req;
  17
  18        req = usb_ep_alloc_request(ep, GFP_ATOMIC);
  19        if (req) {
  20                req->length = usb_endpoint_dir_out(ep->desc) ?
  21                        usb_ep_align(ep, len) : len;
  22                req->buf = kmalloc(req->length, GFP_ATOMIC);
  23                if (!req->buf) {
  24                        usb_ep_free_request(ep, req);
  25                        req = NULL;
  26                }
  27        }
  28        return req;
  29}
  30EXPORT_SYMBOL_GPL(alloc_ep_req);
  31