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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: [PATCHv3 17/27] PCI: mobiveil: fix the checking of valid device Thread-Topic: [PATCHv3 17/27] PCI: mobiveil: fix the checking of valid device Thread-Index: AQHUt6oS419VgGFb5EOSmkHnfUrSZg== Date: Tue, 29 Jan 2019 08:10:17 +0000 Message-ID: <20190129080926.36773-18-Zhiqiang.Hou@nxp.com> References: <20190129080926.36773-1-Zhiqiang.Hou@nxp.com> In-Reply-To: <20190129080926.36773-1-Zhiqiang.Hou@nxp.com> Accept-Language: zh-CN, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-clientproxiedby: HK0PR04CA0008.apcprd04.prod.outlook.com (2603:1096:203:36::20) To AM6PR04MB5781.eurprd04.prod.outlook.com (2603:10a6:20b:ad::19) authentication-results: spf=none (sender IP is ) smtp.mailfrom=zhiqiang.hou@nxp.com; x-ms-exchange-messagesentrepresentingtype: 1 x-mailer: git-send-email 2.17.1 x-originating-ip: [119.31.174.73] x-ms-publictraffictype: Email x-microsoft-exchange-diagnostics: 1; AM6PR04MB5127; 6:o6Zntg9XVgJTXD5inO182Igzmfaf1066rJA0s39EaE1BhKwmaR6NvUrMlZHDP5QxIj+/t235kEIgWaKr8pQpahHU9d68QEZyc8xLeus6hV7Mon2Av4xw0YODGj9mHemgh2u06/ws2Z5KSvu+fMTvoeTg/kyaTCaVWJNLfwbkgTiumF60kd5ynBQv8J/5mdC6tKe0nQpMTbdI87FtF1YXBEKrlFWG7GWWWPduV95V0U5TNCQq82Yz1DmlPDab97IygAz6jaq5Nvxa9YyMgVXAzhcDWYtZTLSt0Z73BvTV2rGDi9N349gXIdrTfYXloC/Ga702UdCzCeaT+QZ+PhvalV+8P0CcmF9IPQO1kxZP1g9U3maWPoE28TN6LkfBk8LpIh8EzUdNTR+UY3FfGtPQlxxXCTG8iIhTOmaIF4tpjbpLpLC0Z+5FTHvoSukEbsw7PUg7lhG1eKz2ABGXeBh75w==; 5:/MXUBOEalw6teUXoanm7J/rCDOhc0uTq7b7LCRUmpvDeC5cVKLOgLzzyMZPO36WHxTHLhKYSDLoqNZp25RE+asbB1FLAz4zYoyseA39iUM7djmyvc6ZCzyirMIrWOtvRkXLa+ZT49KBnc/HAPYqILZb/6qsvbHy67q8hKHL5wV+u35xxJHekYIMAqy/ZKD05KM98lGSYEIsbClz7+ogxgQ==; 7:DU+fYyCxqWGF/Vz2+6Ltlf34AObB309AeJD/uuSFqAZzPIML0XthdC4s+q+EtqCxC1biNxjK0BHtqMlYJhvAYDDAEEzWI7e4Dd9xe7NGmKVY4WurXmbIKIldin7JYekec39CIuK0S89UYRwwqclBmw== x-ms-office365-filtering-correlation-id: a75fd53f-5baa-4c50-73fa-08d685c13472 x-ms-office365-filtering-ht: Tenant x-microsoft-antispam: BCL:0; PCL:0; RULEID:(2390118)(7020095)(4652040)(8989299)(4534185)(4627221)(201703031133081)(201702281549075)(8990200)(5600110)(711020)(4605077)(4618075)(2017052603328)(7153060)(7193020); SRVR:AM6PR04MB5127; x-ms-traffictypediagnostic: AM6PR04MB5127: x-microsoft-antispam-prvs: x-forefront-prvs: 093290AD39 x-forefront-antispam-report: SFV:NSPM; SFS:(10009020)(136003)(396003)(376002)(346002)(366004)(39860400002)(189003)(199004)(6512007)(8936002)(26005)(81166006)(99286004)(4326008)(486006)(52116002)(2501003)(186003)(97736004)(76176011)(105586002)(14454004)(478600001)(106356001)(6486002)(305945005)(54906003)(53936002)(50226002)(81156014)(6436002)(110136005)(8676002)(68736007)(476003)(71190400001)(36756003)(71200400001)(316002)(7416002)(256004)(386003)(2906002)(6506007)(446003)(11346002)(102836004)(66066001)(86362001)(5024004)(14444005)(1076003)(25786009)(7736002)(6116002)(3846002)(2201001)(2616005)(921003)(1121003); DIR:OUT; SFP:1101; SCL:1; SRVR:AM6PR04MB5127; H:AM6PR04MB5781.eurprd04.prod.outlook.com; FPR:; SPF:None; LANG:en; PTR:InfoNoRecords; MX:1; A:1; received-spf: None (protection.outlook.com: nxp.com does not designate permitted sender hosts) x-ms-exchange-senderadcheck: 1 x-microsoft-antispam-message-info: /BVj3CLcnGkk/ju45vEo90gmE+crwfVcDfBObadyIaRODXYWcHd9H00C/qw8ZQsXsBPK4CW43QftKujtY8J/5ds+K37Cc8a9rs7+Wxps0iDvYj56mrC1PWCn5K38zlmoZfE0OoLRddSakIGCKWEcz84Zlht38l8eeZQGbyrSs9p3mWOashlbradFit3RayemKtx+6KNe5bgH8G/9n+RGnSooheiBAacKgmBjUT/dVUOSTJZonk3hVWWH358l5KyOEF2QGOT62bXWR+2R6PDyddtW69ljNKZ+HDacSrNDioLn4WMdqFTGP04ZlOKsOur2oNjfN4EdNi3hwq3Bx76Qt9aUkH7/s8XjBD4onhO58jP0gP62GgAoSrd1jBsk2MI/PjLaEGJLLjlpzXckUPXdDbZt/4kPTUQKNCrnwWB/YkQ= MIME-Version: 1.0 X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: a75fd53f-5baa-4c50-73fa-08d685c13472 X-MS-Exchange-CrossTenant-originalarrivaltime: 29 Jan 2019 08:10:11.7257 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-Transport-CrossTenantHeadersStamped: AM6PR04MB5127 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190129_001056_014269_B2710277 X-CRM114-Status: GOOD ( 11.66 ) 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: "M.h. 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. And allow CFG transactions to all functions of Endpoint implemented multiple functions. Fixes: 9af6bcb11e12 ("PCI: mobiveil: Add Mobiveil PCIe Host Bridge IP driver") Signed-off-by: Hou Zhiqiang Reviewed-by: Minghuan Lian --- V3: - No change drivers/pci/controller/mobiveil/pcie-mobiveil-host.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/pci/controller/mobiveil/pcie-mobiveil-host.c b/drivers/pci/controller/mobiveil/pcie-mobiveil-host.c index dc5324d94466..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; @@ -37,7 +41,7 @@ static bool mobiveil_pcie_valid_device(struct pci_bus *bus, unsigned int devfn) * Do not read more than one device on the bus directly * attached to RC */ - if ((bus->primary == pcie->rp.root_bus_nr) && (devfn > 0)) + if ((bus->primary == pcie->rp.root_bus_nr) && (PCI_SLOT(devfn) > 0)) return false; return true;