From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 47A80C43387 for ; Wed, 19 Dec 2018 11:13:42 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 16FB12184A for ; Wed, 19 Dec 2018 11:13:42 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="dykyos+d" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 16FB12184A Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=amlogic.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:Date: Message-ID:From:References:To:Subject:Reply-To:Content-ID:Content-Description :Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=iXjPkGOhNdjdH4iTOyptwTJfqkf0dRsCA1tzMpyrVb0=; b=dykyos+ddovjiS moFpWpkSIK7h88s+DsRDeWERT4uBO8yWy10fh4T0WyVMRU0QJoqXVVEXM9QBhNxU6ZQnTTzVFgvvp Lh+auJHVbrGU13yi+4uic5jt0Fnwtna6DRIxHzQAmTRYY1WVLA1Sxo0ixkkFumuzzWRVIb9hPeUNN xoDN3MOlfPiLyKKkOq3cy43CnImpDBXyEGqoGq8APwUFP1kIAsB/K9mTwEn/yNs/CEgqiZr+2KmRl kuLG9XZE/W4ixto6TZi3cdfR5twTLSOCcgnz4iYLRJ71ET01I64GsAzm7QHR7kw54C4Km7w/4D+M2 K7kno0Rd2+F9qwMbS7Kg==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1gZZnC-0002EZ-BW; Wed, 19 Dec 2018 11:13:34 +0000 Received: from mail-sh2.amlogic.com ([58.32.228.45]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1gZZn7-0002CO-FX; Wed, 19 Dec 2018 11:13:31 +0000 Received: from [10.18.29.147] (10.18.29.147) by mail-sh2.amlogic.com (10.18.11.6) with Microsoft SMTP Server (TLS) id 15.0.1320.4; Wed, 19 Dec 2018 19:13:47 +0800 Subject: Re: [PATCH v8 2/2] PCI: amlogic: Add the Amlogic Meson PCIe controller driver To: Bjorn Helgaas References: <1545120286-129258-1-git-send-email-hanjie.lin@amlogic.com> <1545120286-129258-3-git-send-email-hanjie.lin@amlogic.com> <20181218224708.GB22610@google.com> From: Hanjie Lin Message-ID: Date: Wed, 19 Dec 2018 19:13:47 +0800 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:60.0) Gecko/20100101 Thunderbird/60.3.3 MIME-Version: 1.0 In-Reply-To: <20181218224708.GB22610@google.com> Content-Language: en-US X-Originating-IP: [10.18.29.147] X-ClientProxiedBy: mail-sh2.amlogic.com (10.18.11.6) To mail-sh2.amlogic.com (10.18.11.6) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20181219_031329_620487_2833D78A X-CRM114-Status: GOOD ( 18.67 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Yixun Lan , Rob Herring , Lorenzo Pieralisi , Jianxin Pan , Kevin Hilman , Shawn Lin , Philippe Ombredanne , linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, Yue Wang , Qiufang Dai , Jian Hu , Liang Yang , Cyrille Pitchen , Gustavo Pimentel , Carlo Caione , linux-amlogic@lists.infradead.org, linux-arm-kernel@lists.infradead.org, Jerome Brunet Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 2018/12/19 6:47, Bjorn Helgaas wrote: > On Tue, Dec 18, 2018 at 04:04:46PM +0800, Hanjie Lin wrote: >> From: Yue Wang >> >> The Amlogic Meson PCIe host controller is based on the Synopsys DesignWare >> PCI core. This patch adds the driver support for Meson PCIe controller. > > I don't have any comments on the code itself; just the trivial things > below. No need to repost for these unless you're changing something > else. > > I thought it looked very pretty overall, thanks for paying attention > to that! > >> +static int meson_size_to_payload(struct meson_pcie *mp, int size) >> +{ >> + struct device *dev = mp->pci.dev; >> + >> + /* >> + * dwc supports 2^(val+7) payload size, which val is 0~5 default to 1. >> + * So if input size is not 2^order alignment or less than 2^7 or bigger >> + * than 2^12, just set to default size 2^(1+7). >> + */ >> + if (!is_power_of_2(size) || size < 128 || size > 4096) { >> + dev_warn(dev, "playload size %d, set to default 256\n", size); > > s/playload/payload/ > >> +static void meson_set_max_payload(struct meson_pcie *mp, int size) >> +{ >> + u32 val = 0; > > Unnecessary initialization. > >> + int max_payload_size = meson_size_to_payload(mp, size); >> + >> + val = meson_elb_readl(mp, PCIE_DEV_CTRL_DEV_STUS); > >> +static int meson_pcie_rd_own_conf(struct pcie_port *pp, int where, int size, >> + u32 *val) >> +{ >> + struct dw_pcie *pci = to_dw_pcie_from_pp(pp); >> + int ret; >> + >> + ret = dw_pcie_read(pci->dbi_base + where, size, val); >> + if (ret != PCIBIOS_SUCCESSFUL) >> + return ret; >> + >> + /* >> + * There is a bug in the MESON AXG pcie controller whereby software >> + * cannot programme the PCI_CLASS_DEVICE register, so we must fabricate >> + * the return value in the config accessors. > > s/pcie/PCIe/ > s/programme/program/ (IIUC, "programme" is British and only used as a > noun, where here you need a verb) > >> +static int meson_pcie_link_up(struct dw_pcie *pci) >> +{ >> + struct meson_pcie *mp = to_meson_pcie(pci); >> + struct device *dev = pci->dev; >> + u32 smlh_up = 0; >> + u32 ltssm_up = 0; >> + u32 rdlh_up = 0; > > Unnecessary initialization of smlh_up, ltssm_up, and rdlh_up. > >> + u32 speed_okay = 0; >> + u32 cnt = 0; >> + u32 state12, state17; >> + >> + do { >> + state12 = meson_cfg_readl(mp, PCIE_CFG_STATUS12); >> + state17 = meson_cfg_readl(mp, PCIE_CFG_STATUS17); >> + smlh_up = IS_SMLH_LINK_UP(state12); >> + rdlh_up = IS_RDLH_LINK_UP(state12); >> + ltssm_up = IS_LTSSM_UP(state12); > >> + dev_err(dev, "Error: Wait linkup timeout.\n"); > > Message doesn't match others from driver (capitalization and trailing > period). > >> + dev_err(dev, "failed to get msi irq\n"); > > s/msi irq/MSI IRQ/ > >> + ret = meson_add_pcie_port(mp, pdev); >> + if (ret < 0) { >> + dev_err(dev, "Add PCIE port failed, %d\n", ret); > > s/PCIE/PCIe/ > > All the messages in this function are capitalized differently than > other messages in the driver. > > Bjorn > > . > hi Bjorn: Thanks for the all suggestions and corrections. There were too many code details unnecessary initialization, typing errors and coding style etc. I will pay more attention to these rules and code-details in the future patches also my daily work. thanks again hanjie. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel