linux-kernel - [PATCH] PCI: qcom-ep: Fix disabling global

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Date:   Wed,  5 Oct 2022 19:28:52 +0530
From:   Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
To:     lpieralisi@...nel.org
Cc:     kw@...ux.com, bhelgaas@...gle.com, linux-pci@...r.kernel.org,
        robh@...nel.org, linux-arm-msm@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
        kernel test robot <lkp@...el.com>
Subject: [PATCH] PCI: qcom-ep: Fix disabling global_irq in error path

After commit 6a534df3da88 ("PCI: qcom-ep: Disable IRQs during driver
remove"), the global irq is stored in the "global_irq" member of pcie_ep
structure. This eliminates the need of local "irq" variable but that
commit didn't remove the "irq" variable usage completely and it is still
used for disable_irq() in error path which is wrong since the variable is
uninitialized.

Fix this by removing the local "irq" variable and using
"pcie_ep->global_irq" for disable_irq() in error path.

Reported-by: kernel test robot <lkp@...el.com>
Fixes: 6a534df3da88 ("PCI: qcom-ep: Disable IRQs during driver remove")
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
---
 drivers/pci/controller/dwc/pcie-qcom-ep.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/pci/controller/dwc/pcie-qcom-ep.c b/drivers/pci/controller/dwc/pcie-qcom-ep.c
index 16bb8f166c3b..00a0728d5ecd 100644
--- a/drivers/pci/controller/dwc/pcie-qcom-ep.c
+++ b/drivers/pci/controller/dwc/pcie-qcom-ep.c
@@ -614,7 +614,7 @@ static irqreturn_t qcom_pcie_ep_perst_irq_thread(int irq, void *data)
 static int qcom_pcie_ep_enable_irq_resources(struct platform_device *pdev,
 					     struct qcom_pcie_ep *pcie_ep)
 {
-	int irq, ret;
+	int ret;
 
 	pcie_ep->global_irq = platform_get_irq_byname(pdev, "global");
 	if (pcie_ep->global_irq < 0)
@@ -637,7 +637,7 @@ static int qcom_pcie_ep_enable_irq_resources(struct platform_device *pdev,
 					"perst_irq", pcie_ep);
 	if (ret) {
 		dev_err(&pdev->dev, "Failed to request PERST IRQ\n");
-		disable_irq(irq);
+		disable_irq(pcie_ep->global_irq);
 		return ret;
 	}
 
-- 
2.25.1