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Hou" X-Patchwork-Id: 10847081 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 49A1417DF for ; Mon, 11 Mar 2019 09:33:13 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 3195828E39 for ; Mon, 11 Mar 2019 09:33:13 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 24E2828E81; Mon, 11 Mar 2019 09:33:13 +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=-5.2 required=2.0 tests=BAD_ENC_HEADER,BAYES_00, DKIM_SIGNED,DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id C13C628E3A for ; Mon, 11 Mar 2019 09:33:12 +0000 (UTC) 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:MIME-Version:In-Reply-To:References: Message-ID:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=zePAQNXJMHTL0/RLUd+XKz3bPKquuy2aY4d8l1qy4ZI=; b=i3O8eu76Q9Wsfe mrox4ttTtpzZfyYeMQWABc77rJKfsethO8LSntwSxHBYb7X7bl01e5iTeIMHHeEQEz+p8vJXFkd+S TqIJivmLGneKeDm8tSCj1kafLwqatA+IIGyPPCtv4lh68/e8XF6s56uEd+5Pt0woprCzUz5K47+zh mlv4GDgVg8tJRL+BlXeIvTf+PzjThxcyk8ykWj/81Fd74hQuNk4bgrbxEkwYK0qz+lqAQ5CFyIFMK q+7d3Bnk3yirozeV0+llilAKk2cJ/aLAi+pqJQfBKzND6kFgGcJRhf2ejAftixJozFVFnZP+SyRn5 Ete0hPurNF1ye3BDuq5w==; 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 1h3HIz-0003bS-CV; Mon, 11 Mar 2019 09:33:09 +0000 Received: from mail-eopbgr70051.outbound.protection.outlook.com ([40.107.7.51] helo=EUR04-HE1-obe.outbound.protection.outlook.com) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1h3HII-0002hm-9p for linux-arm-kernel@lists.infradead.org; Mon, 11 Mar 2019 09:32:49 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nxp.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=IA7rcNmSSO5v+RL22C14TRn1KSNSUYVtFa/zfBl5cVU=; b=jL2mSp/jjJlaws/r44tkyT9pqv41pBm2tv/iFJIt0gzzv0JSFVsi01wthBtxFaE0o5gwiK2HnvGCw+Wfe9SI+d2LIxbhoMR29uZXTaTwpPbLjVEkfzDezooGl/eUVfZpIg9I013+4hWm0iIkNRZqCrcPtzKnYDVf0Z7mZhthu1E= Received: from AM6PR04MB5781.eurprd04.prod.outlook.com (20.179.3.19) by AM6PR04MB4168.eurprd04.prod.outlook.com (52.135.168.26) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.1686.20; Mon, 11 Mar 2019 09:32:22 +0000 Received: from AM6PR04MB5781.eurprd04.prod.outlook.com ([fe80::30cc:e034:1f7a:2cc7]) by AM6PR04MB5781.eurprd04.prod.outlook.com ([fe80::30cc:e034:1f7a:2cc7%2]) with mapi id 15.20.1686.021; Mon, 11 Mar 2019 09:32:22 +0000 From: "Z.q. Hou" To: "linux-pci@vger.kernel.org" , "linux-arm-kernel@lists.infradead.org" , "devicetree@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "bhelgaas@google.com" , "robh+dt@kernel.org" , "mark.rutland@arm.com" , "l.subrahmanya@mobiveil.co.in" , "shawnguo@kernel.org" , Leo Li , "lorenzo.pieralisi@arm.com" , "catalin.marinas@arm.com" , "will.deacon@arm.com" Subject: [PATCHv4 18/28] PCI: mobiveil: add link up condition check Thread-Topic: [PATCHv4 18/28] PCI: mobiveil: add link up condition check Thread-Index: AQHU1+1UyHtNENDYwUWe6uvqq5FW7w== Date: Mon, 11 Mar 2019 09:32:22 +0000 Message-ID: <20190311093130.7209-19-Zhiqiang.Hou@nxp.com> References: <20190311093130.7209-1-Zhiqiang.Hou@nxp.com> In-Reply-To: <20190311093130.7209-1-Zhiqiang.Hou@nxp.com> Accept-Language: zh-CN, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-clientproxiedby: HK0PR03CA0015.apcprd03.prod.outlook.com (2603:1096:203:2e::27) To AM6PR04MB5781.eurprd04.prod.outlook.com (2603:10a6:20b:ad::19) authentication-results: spf=none (sender IP is ) smtp.mailfrom=zhiqiang.hou@nxp.com; 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Lian" , "Z.q. Hou" , Xiaowei Bao , Mingkai Hu Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP From: Hou Zhiqiang Avoid to issue CFG transactions to link partner when the PCIe link is not up. Signed-off-by: Hou Zhiqiang --- V4: - Splited from the 17th patch drivers/pci/controller/mobiveil/pcie-mobiveil-host.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/pci/controller/mobiveil/pcie-mobiveil-host.c b/drivers/pci/controller/mobiveil/pcie-mobiveil-host.c index 74a14f05115e..1ae82e790562 100644 --- a/drivers/pci/controller/mobiveil/pcie-mobiveil-host.c +++ b/drivers/pci/controller/mobiveil/pcie-mobiveil-host.c @@ -29,6 +29,10 @@ static bool mobiveil_pcie_valid_device(struct pci_bus *bus, unsigned int devfn) { struct mobiveil_pcie *pcie = bus->sysdata; + /* If there is no link, then there is no device */ + if (bus->number > pcie->rp.root_bus_nr && !mobiveil_pcie_link_up(pcie)) + return false; + /* Only one device down on each root port */ if ((bus->number == pcie->rp.root_bus_nr) && (devfn > 0)) return false;