From patchwork Fri Mar 29 11:56:25 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jisheng Zhang X-Patchwork-Id: 1069525 X-Patchwork-Delegate: lorenzo.pieralisi@arm.com Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=linux-pci-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=synaptics.com Authentication-Results: ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=Synaptics.onmicrosoft.com header.i=@Synaptics.onmicrosoft.com header.b="h6XmSVxs"; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 44W0ZQ72Rtz9sPn for ; Fri, 29 Mar 2019 22:56:30 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729427AbfC2L43 (ORCPT ); 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Fri, 29 Mar 2019 11:56:25 +0000 From: Jisheng Zhang To: Jingoo Han , Gustavo Pimentel , Lorenzo Pieralisi , Bjorn Helgaas CC: "linux-pci@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "linux-arm-kernel@lists.infradead.org" , Robin Murphy Subject: [PATCH v4 1/5] PCI: dwc: Fix dw_pcie_free_msi() if msi_irq is invalid Thread-Topic: [PATCH v4 1/5] PCI: dwc: Fix dw_pcie_free_msi() if msi_irq is invalid Thread-Index: AQHU5iZvopL5sPWtxEGid/mM16nAoQ== Date: Fri, 29 Mar 2019 11:56:25 +0000 Message-ID: <20190329194844.5c2cde53@xhacker.debian> References: <20190329194750.265f6df6@xhacker.debian> In-Reply-To: <20190329194750.265f6df6@xhacker.debian> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [124.74.246.114] x-clientproxiedby: TY2PR06CA0041.apcprd06.prod.outlook.com (2603:1096:404:2e::29) To BYAPR03MB4773.namprd03.prod.outlook.com (2603:10b6:a03:134::24) authentication-results: spf=none (sender IP is ) smtp.mailfrom=Jisheng.Zhang@synaptics.com; 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DIR:OUT; SFP:1101; SCL:1; SRVR:BYAPR03MB4677; H:BYAPR03MB4773.namprd03.prod.outlook.com; FPR:; SPF:None; LANG:en; PTR:InfoNoRecords; A:0; MX:1; received-spf: None (protection.outlook.com: synaptics.com does not designate permitted sender hosts) x-ms-exchange-senderadcheck: 1 x-microsoft-antispam-message-info: OZTam+kA8UStMH8kLvPdz3/6/QxYEULWQv0Rj1z04h/KD6XcGiT2JjjN+byw+WOrlo89RhpHQAP1lpEfF/cI2xqxgvaQcOdByTO7VqXxHpINOkpEET5Gck3QiFE2GUy46bovIAuT3QOAr2vWnbDtepLKWNCVHqWdpM2dTOz1Iz9HUJgwYZSBFk6I0XnyQam60eDRTsZxkoS6Za7eC0R7ooCI1YbwlghR+QdESE6Dk4tYDVyuro6BwLt1UQAboIRa6FfnWReyreqjZp8ZwRcNKGVzM/5F50/Icym5sGVzYT8qUlH+GQ8wM6loBJ3APBhUx+ZfYMDmmmySeG5w2SVP3SyDx017R00oA98Cj+ql+uukP6r/VCqN3omdo+jSVcm9Gv+D6R6GKvxHFK/w7O+zkQp+2pdc6Xg+smVgDEIKW4w= Content-ID: <64DB777E6D204746B4BB504FAE94DB0A@namprd03.prod.outlook.com> MIME-Version: 1.0 X-OriginatorOrg: synaptics.com X-MS-Exchange-CrossTenant-Network-Message-Id: 6de72837-0dc9-414c-577c-08d6b43d9181 X-MS-Exchange-CrossTenant-originalarrivaltime: 29 Mar 2019 11:56:25.0404 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 335d1fbc-2124-4173-9863-17e7051a2a0e X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-Transport-CrossTenantHeadersStamped: BYAPR03MB4677 Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org We should check msi_irq before calling irq_set_chained_handler() and irq_set_handler_data(). Signed-off-by: Jisheng Zhang Acked-by: Gustavo Pimentel --- drivers/pci/controller/dwc/pcie-designware-host.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c index 25087d3c9a82..1040939f45b4 100644 --- a/drivers/pci/controller/dwc/pcie-designware-host.c +++ b/drivers/pci/controller/dwc/pcie-designware-host.c @@ -298,8 +298,10 @@ int dw_pcie_allocate_domains(struct pcie_port *pp) void dw_pcie_free_msi(struct pcie_port *pp) { - irq_set_chained_handler(pp->msi_irq, NULL); - irq_set_handler_data(pp->msi_irq, NULL); + if (pp->msi_irq) { + irq_set_chained_handler(pp->msi_irq, NULL); + irq_set_handler_data(pp->msi_irq, NULL); + } irq_domain_remove(pp->msi_domain); irq_domain_remove(pp->irq_domain); From patchwork Fri Mar 29 11:57:17 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jisheng Zhang X-Patchwork-Id: 1069530 X-Patchwork-Delegate: lorenzo.pieralisi@arm.com Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; 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DIR:OUT; SFP:1101; SCL:1; SRVR:BYAPR03MB4677; H:BYAPR03MB4773.namprd03.prod.outlook.com; FPR:; SPF:None; LANG:en; PTR:InfoNoRecords; MX:1; A:0; received-spf: None (protection.outlook.com: synaptics.com does not designate permitted sender hosts) x-ms-exchange-senderadcheck: 1 x-microsoft-antispam-message-info: qL8/S+G7thLsFOHYWaWKJyCC+SE7awYRREe3BJSDxYzCJLvIvrHVVrLNqe4G1Uoe9nuX5ttDaYvvoqBTww7R4aatkoUNSKb1kAWoKRJ2zdS9y0ltRX77BE2bfm1NDrNlLuRmwBRrE4c3V4CQeFGDcTERNp/cimh00WGhS8K4wMWjl9Sc/x/Q+g7bEkCWuPRqd9NAfMJnvscDCIX2wFB3UkiZLHyke4FGzFUnt2rPH3SmSpZ+PWHrg9GW2M31vMCqnBTigtVmVH2/7PKvY76YoIyMg5QsmZP1PFHHHMaSwU7XonHkBAP8qdXKayID74l8RylON4Jteyzlt7u2rkocdxa4cSxGPR+oCSFCd+CbSHePwVKq7ieIQ6HA5AkYVfjk5Z3mn2pmeohVul/5GKWP/GvbFkrJUHZ6NWA4slnkwRM= Content-ID: <3D3C0C9B4EF25A44AD8A1CEF9428E6DF@namprd03.prod.outlook.com> MIME-Version: 1.0 X-OriginatorOrg: synaptics.com X-MS-Exchange-CrossTenant-Network-Message-Id: d414ebf8-a007-4070-f133-08d6b43db0c4 X-MS-Exchange-CrossTenant-originalarrivaltime: 29 Mar 2019 11:57:17.4017 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 335d1fbc-2124-4173-9863-17e7051a2a0e X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-Transport-CrossTenantHeadersStamped: BYAPR03MB4677 Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org To avoid memory leak, we need to free the page for MSI in dw_pcie_free_msi(). Signed-off-by: Jisheng Zhang Acked-by: Gustavo Pimentel --- drivers/pci/controller/dwc/pcie-designware-host.c | 12 ++++++++---- drivers/pci/controller/dwc/pcie-designware.h | 1 + 2 files changed, 9 insertions(+), 4 deletions(-) diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c index 1040939f45b4..a71b874ae3c0 100644 --- a/drivers/pci/controller/dwc/pcie-designware-host.c +++ b/drivers/pci/controller/dwc/pcie-designware-host.c @@ -305,20 +305,24 @@ void dw_pcie_free_msi(struct pcie_port *pp) irq_domain_remove(pp->msi_domain); irq_domain_remove(pp->irq_domain); + + if (pp->msi_page) + __free_page(pp->msi_page); } void dw_pcie_msi_init(struct pcie_port *pp) { struct dw_pcie *pci = to_dw_pcie_from_pp(pp); struct device *dev = pci->dev; - struct page *page; u64 msi_target; - page = alloc_page(GFP_KERNEL); - pp->msi_data = dma_map_page(dev, page, 0, PAGE_SIZE, DMA_FROM_DEVICE); + pp->msi_page = alloc_page(GFP_KERNEL); + pp->msi_data = dma_map_page(dev, pp->msi_page, 0, PAGE_SIZE, + DMA_FROM_DEVICE); if (dma_mapping_error(dev, pp->msi_data)) { dev_err(dev, "Failed to map MSI data\n"); - __free_page(page); + __free_page(pp->msi_page); + pp->msi_page = NULL; return; } msi_target = (u64)pp->msi_data; diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h index 377f4c0b52da..6fb0a1879932 100644 --- a/drivers/pci/controller/dwc/pcie-designware.h +++ b/drivers/pci/controller/dwc/pcie-designware.h @@ -179,6 +179,7 @@ struct pcie_port { struct irq_domain *irq_domain; struct irq_domain *msi_domain; dma_addr_t msi_data; + struct page *msi_page; u32 num_vectors; u32 irq_mask[MAX_MSI_CTRLS]; raw_spinlock_t lock; From patchwork Fri Mar 29 11:57:54 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jisheng Zhang X-Patchwork-Id: 1069531 X-Patchwork-Delegate: lorenzo.pieralisi@arm.com Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=linux-pci-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=synaptics.com Authentication-Results: ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=Synaptics.onmicrosoft.com header.i=@Synaptics.onmicrosoft.com header.b="uqWpgKAf"; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 44W0c73hxXz9sP6 for ; Fri, 29 Mar 2019 22:57:59 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729468AbfC2L56 (ORCPT ); Fri, 29 Mar 2019 07:57:58 -0400 Received: from mail-eopbgr790084.outbound.protection.outlook.com ([40.107.79.84]:23352 "EHLO NAM03-CO1-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1729453AbfC2L56 (ORCPT ); Fri, 29 Mar 2019 07:57:58 -0400 DKIM-Signature: v=1; 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DIR:OUT; SFP:1101; SCL:1; SRVR:BYAPR03MB4677; H:BYAPR03MB4773.namprd03.prod.outlook.com; FPR:; SPF:None; LANG:en; PTR:InfoNoRecords; MX:1; A:0; received-spf: None (protection.outlook.com: synaptics.com does not designate permitted sender hosts) x-ms-exchange-senderadcheck: 1 x-microsoft-antispam-message-info: XpEU/8iu7x6u9BEOAQxuLy0ANXGqqMmF2KGS/9hlc/aiWj8JCRi3adUUiwxgU9AiOwEJObwsTZxXowHOyTZWCLOASbVvi9A8u3uv2zW1qxI2Xacc+za5DgOk0RCcGSXtR2P40UDg18LhJAAyEWTUtgADTymTRUOkdgE1rnNjiN7YKquePSthJ2qZ7MbLcSgUo2Pjwr4PXPgBFZxYhZfgcaNUfek9f8/D4YJKa/Bg64KbEspxTpOLWebJlUoGNBlGUS1nJDFIOuoDW1iSIgChtnrVEk+76qo5MsHSSdenmgfFvRuIzpe3k4Jicx3GAlqmiMNoeKnmFa4Bna7eFzJ/0gNB8Ckw1/8Hun9AxPbvMOK2oYEmxp+D3DO9Fptj08JUqmb4OrQjw2EijJlwYmF2/l4xN/dfYLam4ZNsFBXBZoA= Content-ID: <5CF048EA27826E449B67FB5B91E2B4A7@namprd03.prod.outlook.com> MIME-Version: 1.0 X-OriginatorOrg: synaptics.com X-MS-Exchange-CrossTenant-Network-Message-Id: 60148251-00ad-4915-5425-08d6b43dc6f6 X-MS-Exchange-CrossTenant-originalarrivaltime: 29 Mar 2019 11:57:54.6703 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 335d1fbc-2124-4173-9863-17e7051a2a0e X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-Transport-CrossTenantHeadersStamped: BYAPR03MB4677 Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org If we ever did some msi related initializations, we need to call dw_pcie_free_msi() in the error code path. We also remove the IS_ENABLED(CONFIG_PCI_MSI) check for MSI init, because pci_msi_enabled() already has a stub for !CONFIG_PCI_MSI. Signed-off-by: Jisheng Zhang Acked-by: Gustavo Pimentel --- drivers/pci/controller/dwc/pcie-designware-host.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c index a71b874ae3c0..acc9be5cf34a 100644 --- a/drivers/pci/controller/dwc/pcie-designware-host.c +++ b/drivers/pci/controller/dwc/pcie-designware-host.c @@ -445,7 +445,7 @@ int dw_pcie_host_init(struct pcie_port *pp) if (ret) pci->num_viewport = 2; - if (IS_ENABLED(CONFIG_PCI_MSI) && pci_msi_enabled()) { + if (pci_msi_enabled()) { /* * If a specific SoC driver needs to change the * default number of vectors, it needs to implement @@ -483,7 +483,7 @@ int dw_pcie_host_init(struct pcie_port *pp) if (pp->ops->host_init) { ret = pp->ops->host_init(pp); if (ret) - goto error; + goto err_free_msi; } pp->root_bus_nr = pp->busn->start; @@ -497,7 +497,7 @@ int dw_pcie_host_init(struct pcie_port *pp) ret = pci_scan_root_bus_bridge(bridge); if (ret) - goto error; + goto err_free_msi; bus = bridge->bus; @@ -513,6 +513,9 @@ int dw_pcie_host_init(struct pcie_port *pp) pci_bus_add_devices(bus); return 0; +err_free_msi: + if (pci_msi_enabled() && !pp->ops->msi_host_init) + dw_pcie_free_msi(pp); error: pci_free_host_bridge(bridge); return ret; From patchwork Fri Mar 29 11:58:53 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jisheng Zhang X-Patchwork-Id: 1069532 X-Patchwork-Delegate: lorenzo.pieralisi@arm.com Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=linux-pci-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=synaptics.com Authentication-Results: ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=Synaptics.onmicrosoft.com header.i=@Synaptics.onmicrosoft.com header.b="XnNc5RhC"; 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Fri, 29 Mar 2019 11:58:53 +0000 Received: from BYAPR03MB4773.namprd03.prod.outlook.com ([fe80::1a8:1bc4:174b:472b]) by BYAPR03MB4773.namprd03.prod.outlook.com ([fe80::1a8:1bc4:174b:472b%2]) with mapi id 15.20.1750.017; Fri, 29 Mar 2019 11:58:53 +0000 From: Jisheng Zhang To: Jingoo Han , Gustavo Pimentel , Lorenzo Pieralisi , Bjorn Helgaas CC: "linux-pci@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "linux-arm-kernel@lists.infradead.org" , Robin Murphy Subject: [PATCH v4 4/5] PCI: dwc: Use devm_pci_alloc_host_bridge() to simplify the code Thread-Topic: [PATCH v4 4/5] PCI: dwc: Use devm_pci_alloc_host_bridge() to simplify the code Thread-Index: AQHU5ibHIJJqTWvLzUuMnrUhdu3x1g== Date: Fri, 29 Mar 2019 11:58:53 +0000 Message-ID: <20190329195112.11abef0d@xhacker.debian> References: <20190329194750.265f6df6@xhacker.debian> In-Reply-To: <20190329194750.265f6df6@xhacker.debian> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [124.74.246.114] x-clientproxiedby: TY2PR01CA0033.jpnprd01.prod.outlook.com (2603:1096:404:ce::21) To BYAPR03MB4773.namprd03.prod.outlook.com (2603:10b6:a03:134::24) authentication-results: spf=none (sender IP is ) smtp.mailfrom=Jisheng.Zhang@synaptics.com; 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DIR:OUT; SFP:1101; SCL:1; SRVR:BYAPR03MB4677; H:BYAPR03MB4773.namprd03.prod.outlook.com; FPR:; SPF:None; LANG:en; PTR:InfoNoRecords; MX:1; A:0; received-spf: None (protection.outlook.com: synaptics.com does not designate permitted sender hosts) x-ms-exchange-senderadcheck: 1 x-microsoft-antispam-message-info: BZ7niUt8SEoFU8W60tVSqmrLEmH2543h/NThyXb+kNf3Jxi6eITEZAfbuaDfYxrwng71sgpKPfeIIQ8Bl4B6rB8035kVGrxbdbNGF/nONKgFlpEDjfURlKrbJmjTYI7d4yK3Qgf1bE4hmOwv8zIZmOUQd71EvSQ0Cq7jpMk2bWwA6YRiNFsW//ToE3CbxvocEn7zzEZ6D2GVUAfc/pKS06qnFwutBjOCa17lXUJUxLoFyYs45KI0S7stl4RrEZqoBzMJwT1EWFi5O8sVt+XgUV9xMNpu4Q+WSq0DGckX7tTxIcYKU5c83nqSDnhmImxsOejH0uZYlsJAkv4fJUV9R2MB6e3U1s9f2CH7Fkc+SzLRuLzQ31ywZWfncFOb6Uk3ESu2J9EM+m853pFbuSKWy/XB+7TAuXgGyf5O8pJEZ2Q= Content-ID: MIME-Version: 1.0 X-OriginatorOrg: synaptics.com X-MS-Exchange-CrossTenant-Network-Message-Id: d9e84a40-cc01-4cab-9ab4-08d6b43de9e1 X-MS-Exchange-CrossTenant-originalarrivaltime: 29 Mar 2019 11:58:53.1666 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 335d1fbc-2124-4173-9863-17e7051a2a0e X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-Transport-CrossTenantHeadersStamped: BYAPR03MB4677 Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Use devm_pci_alloc_host_bridge() to simplify the error code path. Signed-off-by: Jisheng Zhang Acked-by: Gustavo Pimentel --- .../pci/controller/dwc/pcie-designware-host.c | 21 +++++++------------ 1 file changed, 8 insertions(+), 13 deletions(-) diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c index acc9be5cf34a..dcc7405aff9a 100644 --- a/drivers/pci/controller/dwc/pcie-designware-host.c +++ b/drivers/pci/controller/dwc/pcie-designware-host.c @@ -358,7 +358,7 @@ int dw_pcie_host_init(struct pcie_port *pp) dev_err(dev, "Missing *config* reg space\n"); } - bridge = pci_alloc_host_bridge(0); + bridge = devm_pci_alloc_host_bridge(dev, 0); if (!bridge) return -ENOMEM; @@ -369,7 +369,7 @@ int dw_pcie_host_init(struct pcie_port *pp) ret = devm_request_pci_bus_resources(dev, &bridge->windows); if (ret) - goto error; + return ret; /* Get the I/O and memory ranges from DT */ resource_list_for_each_entry_safe(win, tmp, &bridge->windows) { @@ -413,8 +413,7 @@ int dw_pcie_host_init(struct pcie_port *pp) resource_size(pp->cfg)); if (!pci->dbi_base) { dev_err(dev, "Error with ioremap\n"); - ret = -ENOMEM; - goto error; + return -ENOMEM; } } @@ -425,8 +424,7 @@ int dw_pcie_host_init(struct pcie_port *pp) pp->cfg0_base, pp->cfg0_size); if (!pp->va_cfg0_base) { dev_err(dev, "Error with ioremap in function\n"); - ret = -ENOMEM; - goto error; + return -ENOMEM; } } @@ -436,8 +434,7 @@ int dw_pcie_host_init(struct pcie_port *pp) pp->cfg1_size); if (!pp->va_cfg1_base) { dev_err(dev, "Error with ioremap\n"); - ret = -ENOMEM; - goto error; + return -ENOMEM; } } @@ -460,14 +457,14 @@ int dw_pcie_host_init(struct pcie_port *pp) pp->num_vectors == 0) { dev_err(dev, "Invalid number of vectors\n"); - goto error; + return -EINVAL; } } if (!pp->ops->msi_host_init) { ret = dw_pcie_allocate_domains(pp); if (ret) - goto error; + return ret; if (pp->msi_irq) irq_set_chained_handler_and_data(pp->msi_irq, @@ -476,7 +473,7 @@ int dw_pcie_host_init(struct pcie_port *pp) } else { ret = pp->ops->msi_host_init(pp); if (ret < 0) - goto error; + return ret; } } @@ -516,8 +513,6 @@ int dw_pcie_host_init(struct pcie_port *pp) err_free_msi: if (pci_msi_enabled() && !pp->ops->msi_host_init) dw_pcie_free_msi(pp); -error: - pci_free_host_bridge(bridge); return ret; } From patchwork Fri Mar 29 11:59:26 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jisheng Zhang X-Patchwork-Id: 1069534 X-Patchwork-Delegate: lorenzo.pieralisi@arm.com Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=linux-pci-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=synaptics.com Authentication-Results: ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=Synaptics.onmicrosoft.com header.i=@Synaptics.onmicrosoft.com header.b="P8fQvyM7"; 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Fri, 29 Mar 2019 11:59:26 +0000 Received: from BYAPR03MB4773.namprd03.prod.outlook.com ([fe80::1a8:1bc4:174b:472b]) by BYAPR03MB4773.namprd03.prod.outlook.com ([fe80::1a8:1bc4:174b:472b%2]) with mapi id 15.20.1750.017; Fri, 29 Mar 2019 11:59:26 +0000 From: Jisheng Zhang To: Jingoo Han , Gustavo Pimentel , Lorenzo Pieralisi , Bjorn Helgaas CC: "linux-pci@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "linux-arm-kernel@lists.infradead.org" , Robin Murphy Subject: [PATCH v4 5/5] PCI: dwc: Save root bus for driver remove Thread-Topic: [PATCH v4 5/5] PCI: dwc: Save root bus for driver remove Thread-Index: AQHU5ibbnD0hZoEW0kmtfkvI6C/+vA== Date: Fri, 29 Mar 2019 11:59:26 +0000 Message-ID: <20190329195146.3b15dcac@xhacker.debian> References: <20190329194750.265f6df6@xhacker.debian> In-Reply-To: <20190329194750.265f6df6@xhacker.debian> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [124.74.246.114] x-clientproxiedby: TYXPR01CA0047.jpnprd01.prod.outlook.com (2603:1096:403:a::17) To BYAPR03MB4773.namprd03.prod.outlook.com (2603:10b6:a03:134::24) authentication-results: spf=none (sender IP is ) smtp.mailfrom=Jisheng.Zhang@synaptics.com; 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DIR:OUT; SFP:1101; SCL:1; SRVR:BYAPR03MB4677; H:BYAPR03MB4773.namprd03.prod.outlook.com; FPR:; SPF:None; LANG:en; PTR:InfoNoRecords; MX:1; A:0; received-spf: None (protection.outlook.com: synaptics.com does not designate permitted sender hosts) x-ms-exchange-senderadcheck: 1 x-microsoft-antispam-message-info: KLYrOAccSPqrNfrLuFOq0SU49FcPJgz1IkfyTu18TBXBuSopBujyK1MTyZ+YvF6g7kraDgnfp6cAedVDsAWB3JRYPK+red3IZtLgodKtGIGm8pR63Uxx4k5bO6ghelncX446jV63fMNJ64lXTa1yVbmfkalzABSaAPLc2UjUMLHBA4lS4S3pKe8QMZ+ug00LNJZ4Qvq4+TmvGDtIZxKCdzGiy0caw65H+BoVuwMyVDdD/qKtQfXeDTUk9mrTI3iO0UKViyXd3EFPHkSvI2eAsxGS+n7sbEhCXGsl4S/l4zK4Le8h0ZaC++tHOxJcd54Bv/JX16TaoqrIX8Jm8ZPUVuOSzHXA1UE215R/bSHC3j8WnRaOAcCrEUFQfu6YVGZrOTZGYnHUOsNc7JTWnbkwuL5kVMwwUsfQVOF13g3RtgQ= Content-ID: <41385B38B83CC14EA7F859BE693DD822@namprd03.prod.outlook.com> MIME-Version: 1.0 X-OriginatorOrg: synaptics.com X-MS-Exchange-CrossTenant-Network-Message-Id: cf96f3e6-aa27-430c-3406-08d6b43dfdb4 X-MS-Exchange-CrossTenant-originalarrivaltime: 29 Mar 2019 11:59:26.4315 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 335d1fbc-2124-4173-9863-17e7051a2a0e X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-Transport-CrossTenantHeadersStamped: BYAPR03MB4677 Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Currently dwc host doesn't support the remove, but nothing prevent us from supporting it. Save the root bus for clean up work in driver remove code path. After this patch, the dwc host users could implement its remove as: static int foo_pcie_remove(struct platform_device *pdev) { ... pci_stop_root_bus(pp->root_bus); pci_remove_root_bus(pp->root_bus); dw_pcie_free_msi(pp); ... } Signed-off-by: Jisheng Zhang Acked-by: Gustavo Pimentel --- drivers/pci/controller/dwc/pcie-designware-host.c | 12 ++++++------ drivers/pci/controller/dwc/pcie-designware.h | 1 + 2 files changed, 7 insertions(+), 6 deletions(-) diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c index dcc7405aff9a..3e4169e738a5 100644 --- a/drivers/pci/controller/dwc/pcie-designware-host.c +++ b/drivers/pci/controller/dwc/pcie-designware-host.c @@ -341,7 +341,7 @@ int dw_pcie_host_init(struct pcie_port *pp) struct device_node *np = dev->of_node; struct platform_device *pdev = to_platform_device(dev); struct resource_entry *win, *tmp; - struct pci_bus *bus, *child; + struct pci_bus *child; struct pci_host_bridge *bridge; struct resource *cfg_res; int ret; @@ -496,18 +496,18 @@ int dw_pcie_host_init(struct pcie_port *pp) if (ret) goto err_free_msi; - bus = bridge->bus; + pp->root_bus = bridge->bus; if (pp->ops->scan_bus) pp->ops->scan_bus(pp); - pci_bus_size_bridges(bus); - pci_bus_assign_resources(bus); + pci_bus_size_bridges(pp->root_bus); + pci_bus_assign_resources(pp->root_bus); - list_for_each_entry(child, &bus->children, node) + list_for_each_entry(child, &pp->root_bus->children, node) pcie_bus_configure_settings(child); - pci_bus_add_devices(bus); + pci_bus_add_devices(pp->root_bus); return 0; err_free_msi: diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h index 6fb0a1879932..adff0c713665 100644 --- a/drivers/pci/controller/dwc/pcie-designware.h +++ b/drivers/pci/controller/dwc/pcie-designware.h @@ -182,6 +182,7 @@ struct pcie_port { struct page *msi_page; u32 num_vectors; u32 irq_mask[MAX_MSI_CTRLS]; + struct pci_bus *root_bus; raw_spinlock_t lock; DECLARE_BITMAP(msi_irq_in_use, MAX_MSI_IRQS); };