| /* |
| * u_f.c -- USB function utilities for Gadget stack |
| * |
| * Copyright (c) 2013 Samsung Electronics Co., Ltd. |
| * http://www.samsung.com |
| * |
| * Author: Andrzej Pietrasiewicz <andrzej.p@samsung.com> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| */ |
| |
| #include "u_f.h" |
| #include <linux/usb/ch9.h> |
| |
| struct usb_request *alloc_ep_req(struct usb_ep *ep, size_t len, int default_len) |
| { |
| struct usb_request *req; |
| |
| req = usb_ep_alloc_request(ep, GFP_ATOMIC); |
| if (req) { |
| req->length = len ?: default_len; |
| if (usb_endpoint_dir_out(ep->desc)) |
| req->length = usb_ep_align(ep, req->length); |
| 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); |
