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