Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752018AbdIKNCf (ORCPT ); Mon, 11 Sep 2017 09:02:35 -0400 Received: from conuserg-12.nifty.com ([210.131.2.79]:43565 "EHLO conuserg-12.nifty.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751253AbdIKNCd (ORCPT ); Mon, 11 Sep 2017 09:02:33 -0400 DKIM-Filter: OpenDKIM Filter v2.10.3 conuserg-12.nifty.com v8BD1I4Y001997 X-Nifty-SrcIP: [153.142.97.92] From: Masahiro Yamada To: Srinivas Kandagatla Cc: Keiji Hayashibara , Masami Hiramatsu , Jassi Brar , Masahiro Yamada , linux-kernel@vger.kernel.org, linux-mediatek@lists.infradead.org, linux-arm-kernel@lists.infradead.org, Matthias Brugger Subject: [PATCH 2/5] nvmem: mtk-efuse: use stack for nvmem_config instead of malloc'ing it Date: Mon, 11 Sep 2017 22:01:01 +0900 Message-Id: <1505134864-11975-3-git-send-email-yamada.masahiro@socionext.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1505134864-11975-1-git-send-email-yamada.masahiro@socionext.com> References: <1505134864-11975-1-git-send-email-yamada.masahiro@socionext.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1727 Lines: 56 nvmem_register() copies all the members of nvmem_config to nvmem_device. So, nvmem_config is one-time use data during probing. There is no point to keep it until the driver detach. Using stack should be no problem because nvmem_config is pretty small. Signed-off-by: Masahiro Yamada --- drivers/nvmem/mtk-efuse.c | 24 ++++++++++-------------- 1 file changed, 10 insertions(+), 14 deletions(-) diff --git a/drivers/nvmem/mtk-efuse.c b/drivers/nvmem/mtk-efuse.c index 32fd572..fa7a0f6 100644 --- a/drivers/nvmem/mtk-efuse.c +++ b/drivers/nvmem/mtk-efuse.c @@ -49,7 +49,7 @@ static int mtk_efuse_probe(struct platform_device *pdev) struct device *dev = &pdev->dev; struct resource *res; struct nvmem_device *nvmem; - struct nvmem_config *econfig; + struct nvmem_config econfig = {}; void __iomem *base; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); @@ -57,19 +57,15 @@ static int mtk_efuse_probe(struct platform_device *pdev) if (IS_ERR(base)) return PTR_ERR(base); - econfig = devm_kzalloc(dev, sizeof(*econfig), GFP_KERNEL); - if (!econfig) - return -ENOMEM; - - econfig->stride = 4; - econfig->word_size = 4; - econfig->reg_read = mtk_reg_read; - econfig->reg_write = mtk_reg_write; - econfig->size = resource_size(res); - econfig->priv = base; - econfig->dev = dev; - econfig->owner = THIS_MODULE; - nvmem = nvmem_register(econfig); + econfig.stride = 4; + econfig.word_size = 4; + econfig.reg_read = mtk_reg_read; + econfig.reg_write = mtk_reg_write; + econfig.size = resource_size(res); + econfig.priv = base; + econfig.dev = dev; + econfig.owner = THIS_MODULE; + nvmem = nvmem_register(&econfig); if (IS_ERR(nvmem)) return PTR_ERR(nvmem); -- 2.7.4