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From: Jisheng Zhang <Jisheng.Zhang@synaptics.com>
To: Jingoo Han <jingoohan1@gmail.com>,
	Gustavo Pimentel <gustavo.pimentel@synopsys.com>,
	Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
	Bjorn Helgaas <bhelgaas@google.com>
Cc: "linux-pci@vger.kernel.org" <linux-pci@vger.kernel.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	"linux-arm-kernel@lists.infradead.org" 
	<linux-arm-kernel@lists.infradead.org>
Subject: [PATCH v2 1/5] PCI: dwc: Fix dw_pcie_free_msi() if msi_irq is invalid
Date: Fri, 1 Mar 2019 05:03:27 +0000
Message-ID: <20190301125625.4e15d869@xhacker.debian> (raw)
In-Reply-To: <20190301125510.4e2ee985@xhacker.debian>

We should check msi_irq before calling irq_set_chained_handler() and
irq_set_handler_data().

Signed-off-by: Jisheng Zhang <Jisheng.Zhang@synaptics.com>
---
 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 0c18ab63811f..a94d3530b694 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);
-- 
2.20.1


  reply index

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-03-01  5:02 [PATCH v2 0/5] PCI: dwc: Support remove Jisheng Zhang
2019-03-01  5:03 ` Jisheng Zhang [this message]
2019-03-13 10:05   ` [PATCH v2 1/5] PCI: dwc: Fix dw_pcie_free_msi() if msi_irq is invalid Gustavo Pimentel
2019-03-01  5:04 ` [PATCH v2 2/5] PCI: dwc: Free the page for MSI IRQ in dw_pcie_free_msi() Jisheng Zhang
2019-03-13 10:12   ` Gustavo Pimentel
2019-03-01  5:05 ` [PATCH v2 3/5] PCI: dwc: Free MSI in the error code path of dw_pcie_host_init() Jisheng Zhang
2019-03-13 10:24   ` Gustavo Pimentel
2019-03-01  5:06 ` [PATCH v2 4/5] PCI: dwc: Use devm_pci_alloc_host_bridge() to simplify the code Jisheng Zhang
2019-03-13 10:37   ` Gustavo Pimentel
2019-03-01  5:06 ` [PATCH v2 5/5] PCI: dwc: Save root bus for driver remove Jisheng Zhang
2019-03-13 10:33   ` Gustavo Pimentel

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