From patchwork Wed May 29 15:13:26 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Gustavo A. R. Silva" X-Patchwork-Id: 10967253 X-Patchwork-Delegate: jgg@ziepe.ca Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id C59B71395 for ; Wed, 29 May 2019 15:37:01 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id B6E5628A3E for ; Wed, 29 May 2019 15:37:01 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id AB19328A3F; Wed, 29 May 2019 15:37:01 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 5B9D0287CF for ; Wed, 29 May 2019 15:37:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726173AbfE2PhA (ORCPT ); Wed, 29 May 2019 11:37:00 -0400 Received: from gateway33.websitewelcome.com ([192.185.145.239]:36798 "EHLO gateway33.websitewelcome.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725914AbfE2PhA (ORCPT ); Wed, 29 May 2019 11:37:00 -0400 X-Greylist: delayed 1411 seconds by postgrey-1.27 at vger.kernel.org; Wed, 29 May 2019 11:37:00 EDT Received: from cm16.websitewelcome.com (cm16.websitewelcome.com [100.42.49.19]) by gateway33.websitewelcome.com (Postfix) with ESMTP id 1FC7441407D for ; Wed, 29 May 2019 10:13:28 -0500 (CDT) Received: from gator4166.hostgator.com ([108.167.133.22]) by cmsmtp with SMTP id W0GehpKUz4FKpW0GehAY7M; Wed, 29 May 2019 10:13:28 -0500 X-Authority-Reason: nr=8 Received: from [189.250.47.159] (port=47384 helo=embeddedor) by gator4166.hostgator.com with esmtpa (Exim 4.91) (envelope-from ) id 1hW0Gd-001JMv-1L; Wed, 29 May 2019 10:13:27 -0500 Date: Wed, 29 May 2019 10:13:26 -0500 From: "Gustavo A. R. Silva" To: Dennis Dalessandro , Mike Marciniszyn , Doug Ledford , Jason Gunthorpe Cc: linux-rdma@vger.kernel.org, linux-kernel@vger.kernel.org, "Gustavo A. R. Silva" Subject: [PATCH][next] IB/qib: Use struct_size() helper Message-ID: <20190529151326.GA24109@embeddedor> MIME-Version: 1.0 Content-Disposition: inline User-Agent: Mutt/1.9.4 (2018-02-28) X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - gator4166.hostgator.com X-AntiAbuse: Original Domain - vger.kernel.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - embeddedor.com X-BWhitelist: no X-Source-IP: 189.250.47.159 X-Source-L: No X-Exim-ID: 1hW0Gd-001JMv-1L X-Source: X-Source-Args: X-Source-Dir: X-Source-Sender: (embeddedor) [189.250.47.159]:47384 X-Source-Auth: gustavo@embeddedor.com X-Email-Count: 11 X-Source-Cap: Z3V6aWRpbmU7Z3V6aWRpbmU7Z2F0b3I0MTY2Lmhvc3RnYXRvci5jb20= X-Local-Domain: yes Sender: linux-rdma-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Make use of the struct_size() helper instead of an open-coded version in order to avoid any potential type mistakes, in particular in the context in which this code is being used. So, replace the following form: sizeof(*pkt) + sizeof(pkt->addr[0])*n with: struct_size(pkt, addr, n) Also, notice that variable size is unnecessary, hence it is removed. This code was detected with the help of Coccinelle. Signed-off-by: Gustavo A. R. Silva Reviewed-by: Dennis Dalessandro --- drivers/infiniband/hw/qib/qib_user_sdma.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/infiniband/hw/qib/qib_user_sdma.c b/drivers/infiniband/hw/qib/qib_user_sdma.c index 0c204776263f..97649f64e09e 100644 --- a/drivers/infiniband/hw/qib/qib_user_sdma.c +++ b/drivers/infiniband/hw/qib/qib_user_sdma.c @@ -904,10 +904,11 @@ static int qib_user_sdma_queue_pkts(const struct qib_devdata *dd, } if (frag_size) { - int pktsize, tidsmsize, n; + int tidsmsize, n; + size_t pktsize; n = npages*((2*PAGE_SIZE/frag_size)+1); - pktsize = sizeof(*pkt) + sizeof(pkt->addr[0])*n; + pktsize = struct_size(pkt, addr, n); /* * Determine if this is tid-sdma or just sdma.