1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0 2*4882a593Smuzhiyun /* 3*4882a593Smuzhiyun * u_f.c -- USB function utilities for Gadget stack 4*4882a593Smuzhiyun * 5*4882a593Smuzhiyun * Copyright (c) 2013 Samsung Electronics Co., Ltd. 6*4882a593Smuzhiyun * http://www.samsung.com 7*4882a593Smuzhiyun * 8*4882a593Smuzhiyun * Author: Andrzej Pietrasiewicz <andrzejtp2010@gmail.com> 9*4882a593Smuzhiyun */ 10*4882a593Smuzhiyun 11*4882a593Smuzhiyun #include "u_f.h" 12*4882a593Smuzhiyun #include <linux/usb/ch9.h> 13*4882a593Smuzhiyun alloc_ep_req(struct usb_ep * ep,size_t len)14*4882a593Smuzhiyunstruct usb_request *alloc_ep_req(struct usb_ep *ep, size_t len) 15*4882a593Smuzhiyun { 16*4882a593Smuzhiyun struct usb_request *req; 17*4882a593Smuzhiyun 18*4882a593Smuzhiyun req = usb_ep_alloc_request(ep, GFP_ATOMIC); 19*4882a593Smuzhiyun if (req) { 20*4882a593Smuzhiyun req->length = usb_endpoint_dir_out(ep->desc) ? 21*4882a593Smuzhiyun usb_ep_align(ep, len) : len; 22*4882a593Smuzhiyun req->buf = kmalloc(req->length, GFP_ATOMIC); 23*4882a593Smuzhiyun if (!req->buf) { 24*4882a593Smuzhiyun usb_ep_free_request(ep, req); 25*4882a593Smuzhiyun req = NULL; 26*4882a593Smuzhiyun } 27*4882a593Smuzhiyun } 28*4882a593Smuzhiyun return req; 29*4882a593Smuzhiyun } 30*4882a593Smuzhiyun EXPORT_SYMBOL_GPL(alloc_ep_req); 31