[linux-block.git] / drivers / usb / gadget / u_f.c

// SPDX-License-Identifier: GPL-2.0
/*
 * u_f.c -- USB function utilities for Gadget stack
 *
 * Copyright (c) 2013 Samsung Electronics Co., Ltd.
 *		http://www.samsung.com
 *
 * Author: Andrzej Pietrasiewicz <andrzejtp2010@gmail.com>
 */

#include "u_f.h"
#include <linux/usb/ch9.h>

struct usb_request *alloc_ep_req(struct usb_ep *ep, size_t len)
{
	struct usb_request      *req;

	req = usb_ep_alloc_request(ep, GFP_ATOMIC);
	if (req) {
		req->length = usb_endpoint_dir_out(ep->desc) ?
			usb_ep_align(ep, len) : len;
		req->buf = kmalloc(req->length, GFP_ATOMIC);
		if (!req->buf) {
			usb_ep_free_request(ep, req);
			req = NULL;
		}
	}
	return req;
}
EXPORT_SYMBOL_GPL(alloc_ep_req);
Commit	Line	Data
5fd54ace	1	// SPDX-License-Identifier: GPL-2.0
1efd54ea AP	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	*
1b4a3b51	8	* Author: Andrzej Pietrasiewicz <andrzejtp2010@gmail.com>
1efd54ea AP	9	*/
1efd54ea AP	10
1efd54ea	11	#include "u_f.h"
e0466156	12	#include <linux/usb/ch9.h>
1efd54ea	13
aadbe812	14	struct usb_request alloc_ep_req(struct usb_ep ep, size_t len)
1efd54ea AP	15	{
	16	struct usb_request *req;
	17
	18	req = usb_ep_alloc_request(ep, GFP_ATOMIC);
	19	if (req) {
aadbe812 FT	20	req->length = usb_endpoint_dir_out(ep->desc) ?
aadbe812 FT	21	usb_ep_align(ep, len) : len;
1efd54ea AP	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	}
0700faaf	30	EXPORT_SYMBOL_GPL(alloc_ep_req);