From patchwork Wed Jun 17 21:11:35 2020 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: 11610575 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 0A9F5618 for ; Wed, 17 Jun 2020 21:06:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DCEE521897 for ; Wed, 17 Jun 2020 21:06:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1592427975; bh=PxleSRdzxhbBNA5Z6VGYwX4pwZygLkPhy8QDrAX3jCk=; h=Date:From:To:Cc:Subject:List-ID:From; b=PlkctPTNA/9RfmJQVNtSsKrOzGDnUJ0vcl/KkmBTnncPwgU9T4f8keGNJrwsZf7WE ub+XWTjnzBseZYcUxtfUCh/CVuEqScMAC6FkfOyapSfIcI+W1jOdLXWsiQYqLYKQK5 2aHMJs9dbOUDQ6RdqlPEK+lCKGBtDHYkU2mWQUao= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726868AbgFQVGP (ORCPT ); Wed, 17 Jun 2020 17:06:15 -0400 Received: from mail.kernel.org ([198.145.29.99]:43942 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726761AbgFQVGP (ORCPT ); Wed, 17 Jun 2020 17:06:15 -0400 Received: from embeddedor (unknown [189.207.59.248]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 7F8CE2186A; Wed, 17 Jun 2020 21:06:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1592427975; bh=PxleSRdzxhbBNA5Z6VGYwX4pwZygLkPhy8QDrAX3jCk=; h=Date:From:To:Cc:Subject:From; b=zBAD2pPyr5zueEtIkpdCXgi7IRAM+MnOtTEf0cFRMdnBMiDG6HfNpnK76KbKhg5rY nL9uhthDQKlT/UphVgxG81qqyn4Q9UCBABeqek8Om/jsddbJ0cGZyPSl1rCKFPUmoD 2bKIGoBBqDcN4Wm5z+YGkK1H4c1f34HUfl1WHbbc= Date: Wed, 17 Jun 2020 16:11:35 -0500 From: "Gustavo A. R. Silva" To: Zhou Wang , Dan Williams , Vinod Koul Cc: dmaengine@vger.kernel.org, linux-kernel@vger.kernel.org, "Gustavo A. R. Silva" Subject: [PATCH][next] dmaengine: hisilicon: Use struct_size() in devm_kzalloc() Message-ID: <20200617211135.GA8660@embeddedor> MIME-Version: 1.0 Content-Disposition: inline User-Agent: Mutt/1.9.4 (2018-02-28) Sender: dmaengine-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: dmaengine@vger.kernel.org Make use of the struct_size() helper instead of an open-coded version in order to avoid any potential type mistakes. This code was detected with the help of Coccinelle and, audited and fixed manually. Signed-off-by: Gustavo A. R. Silva Reviewed-by: Zhou Wang --- drivers/dma/hisi_dma.c | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-) diff --git a/drivers/dma/hisi_dma.c b/drivers/dma/hisi_dma.c index ed3619266a48..e1a958ae7925 100644 --- a/drivers/dma/hisi_dma.c +++ b/drivers/dma/hisi_dma.c @@ -511,7 +511,6 @@ static int hisi_dma_probe(struct pci_dev *pdev, const struct pci_device_id *id) struct device *dev = &pdev->dev; struct hisi_dma_dev *hdma_dev; struct dma_device *dma_dev; - size_t dev_size; int ret; ret = pcim_enable_device(pdev); @@ -534,9 +533,7 @@ static int hisi_dma_probe(struct pci_dev *pdev, const struct pci_device_id *id) if (ret) return ret; - dev_size = sizeof(struct hisi_dma_chan) * HISI_DMA_CHAN_NUM + - sizeof(*hdma_dev); - hdma_dev = devm_kzalloc(dev, dev_size, GFP_KERNEL); + hdma_dev = devm_kzalloc(dev, struct_size(hdma_dev, chan, HISI_DMA_CHAN_NUM), GFP_KERNEL); if (!hdma_dev) return -EINVAL;