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Mon, 18 Mar 2019 09:53:58 +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 09:53:58 +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 1/5] PCI: dwc: Fix dw_pcie_free_msi() if msi_irq is invalid Thread-Topic: [PATCH v3 1/5] PCI: dwc: Fix dw_pcie_free_msi() if msi_irq is invalid Thread-Index: AQHU3XCBU3uwzE9WGUSd1tZpXYixvQ== Date: Mon, 18 Mar 2019 09:53:58 +0000 Message-ID: <20190318174633.0c274139@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: 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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received-spf: None (protection.outlook.com: synaptics.com does not designate permitted sender hosts) x-ms-exchange-senderadcheck: 1 x-microsoft-antispam-message-info: ccpHDM39++MylEVwt8a6f0aKg00R4KN4/syV5OD+UUPHsDqk41z4J29BWvCqKTHoIiUh8LH5L+Q8uC+d+WB5EEz/Ok4/FFpPWSi/h5H+rh1hGwpQ3le9Mgf/IXW/qOxrAyXe/zQgb+ogEJbaH6xBiTOtkpvaI1GxphgxLqxlCSKSdy4Vi8teH+y48ysEZF9ZsAl56s8MPg3tgVxpMJx1KW6X5d5ZE7Mcs8uE1NYfis0Q0GaXcP94l+gxc2iGEzgpa4qqdOZgzCz5SCnZzcf2Ernr2KI83f/tWrXwHircz3kvV6zeSjZDBiBcCXcgNs0EreVw6UbIW+Gurhn8ZMvI7gr+QRDq4Fl8FK8EA6cPoOGFpS1APfOS6BtPGEuDKToEbWhRG+dMWTa10vL0XlpPJBTRJ7lFwhSCS3y5TsLfQEw= Content-ID: <53329CAEE770B34EBA1A7B7036C3A00F@namprd03.prod.outlook.com> MIME-Version: 1.0 X-OriginatorOrg: synaptics.com X-MS-Exchange-CrossTenant-Network-Message-Id: 229742a1-4efe-48ea-3b04-08d6ab87a404 X-MS-Exchange-CrossTenant-originalarrivaltime: 18 Mar 2019 09:53:58.2851 (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 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);