/* * 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) { 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); |