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Mon, 18 Mar 2019 09:54:35 +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 15.20.1709.015; Mon, 18 Mar 2019 09:54:35 +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" Subject: [PATCH v3 2/5] PCI: dwc: Free the page for MSI IRQ in dw_pcie_free_msi() Thread-Topic: [PATCH v3 2/5] PCI: dwc: Free the page for MSI IRQ in dw_pcie_free_msi() Thread-Index: AQHU3XCXLFkjRFjYXE6Zgkga34dsXA== Date: Mon, 18 Mar 2019 09:54:35 +0000 Message-ID: <20190318174711.4b7e556a@xhacker.debian> References: <20190318174415.74fd25a5@xhacker.debian> In-Reply-To: <20190318174415.74fd25a5@xhacker.debian> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [199.33.119.15] x-clientproxiedby: TY2PR06CA0036.apcprd06.prod.outlook.com (2603:1096:404:2e::24) 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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received-spf: None (protection.outlook.com: synaptics.com does not designate permitted sender hosts) x-ms-exchange-senderadcheck: 1 x-microsoft-antispam-message-info: ig23TILqcWMGEjo2l+xtqMLrwtl3hjqUhZfZfalMcGzf2DRjcAWkAacQHZ8V+xc3x0lUoXPYnZbk8AA5J5IIisl1CbXQfZNRKX9m3ore3lxvv7VmrQCwdcMAbrDXyt42rsRL+zRnMeLNiWzJosubJDbV0jvXdjZJ7adlGoi8LZkbloBkvoI/h/Mc7S8qU0KQSonSS7li3dmlNRXHd5TrHVQpCsRYr947WZ1xlZYsavwnsNISn6jRUB9DxefsYLuOM3Qn40qlFrRR2Ub+/u/Corpfqi+QvIeMuQiDkjuWmuNe/6ALsHhqOT8wZUNd6lkKk65rJ1OszJofWrT+qQY45yK4oZWy7nCSbvl3uP94/WseNaSJ1m+Sxhdncx+JuzbppTYeLX6SI2lspUJrHn+aWku6KTbzNOUX7u/wM6ovDDU= Content-ID: <81A4B6EE3748A14588AFA809EC746986@namprd03.prod.outlook.com> MIME-Version: 1.0 X-OriginatorOrg: synaptics.com X-MS-Exchange-CrossTenant-Network-Message-Id: eac676f7-6dba-449d-6b63-08d6ab87ba01 X-MS-Exchange-CrossTenant-originalarrivaltime: 18 Mar 2019 09:54:35.0714 (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: BYAPR03MB3928 Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP 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;