1/*
 2 * u_f.c -- USB function utilities for Gadget stack
 3 *
 4 * Copyright (c) 2013 Samsung Electronics Co., Ltd.
 5 *		http://www.samsung.com
 6 *
 7 * Author: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
 8 *
 9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
14#include <linux/usb/gadget.h>
15#include "u_f.h"
 
16
17struct usb_request *alloc_ep_req(struct usb_ep *ep, int len, int default_len)
18{
19	struct usb_request      *req;
20
21	req = usb_ep_alloc_request(ep, GFP_ATOMIC);
22	if (req) {
23		req->length = len ?: default_len;
 
24		req->buf = kmalloc(req->length, GFP_ATOMIC);
25		if (!req->buf) {
26			usb_ep_free_request(ep, req);
27			req = NULL;
28		}
29	}
30	return req;
31}
32EXPORT_SYMBOL(alloc_ep_req);

 1/*
 2 * u_f.c -- USB function utilities for Gadget stack
 3 *
 4 * Copyright (c) 2013 Samsung Electronics Co., Ltd.
 5 *		http://www.samsung.com
 6 *
 7 * Author: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
 8 *
 9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
 
14#include "u_f.h"
15#include <linux/usb/ch9.h>
16
17struct usb_request *alloc_ep_req(struct usb_ep *ep, size_t len)
18{
19	struct usb_request      *req;
20
21	req = usb_ep_alloc_request(ep, GFP_ATOMIC);
22	if (req) {
23		req->length = usb_endpoint_dir_out(ep->desc) ?
24			usb_ep_align(ep, len) : len;
25		req->buf = kmalloc(req->length, GFP_ATOMIC);
26		if (!req->buf) {
27			usb_ep_free_request(ep, req);
28			req = NULL;
29		}
30	}
31	return req;
32}
33EXPORT_SYMBOL_GPL(alloc_ep_req);