[PATCH] perf/dwc_pcie: Fix PCI device reference leak in probe

[Ruoyu Wang <ruoyuw560@gmail.com>]

pci_get_domain_bus_and_slot() returns a referenced PCI device. When the
subsequent RAS DES capability lookup fails, dwc_pcie_pmu_probe() returns
-ENODEV without releasing that reference. Repeated failed probes can
therefore keep the PCI device allocated after removal.

Move the existing pci_dev_put() immediately after capability discovery
so the temporary lookup reference is released on both success and
failure paths.

This issue was found by a static analysis checker and confirmed by
manual source review.

Fixes: 7f35b429802a ("perf/dwc_pcie: fix duplicate pci_dev devices")
Signed-off-by: Ruoyu Wang <ruoyuw560@gmail.com>
---
 drivers/perf/dwc_pcie_pmu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/perf/dwc_pcie_pmu.c b/drivers/perf/dwc_pcie_pmu.c
index 5385401fa9cf6..baa736fd9a6ef 100644
--- a/drivers/perf/dwc_pcie_pmu.c
+++ b/drivers/perf/dwc_pcie_pmu.c
@@ -710,10 +710,10 @@ static int dwc_pcie_pmu_probe(struct platform_device *plat_dev)
 	}
 
 	vsec = dwc_pcie_des_cap(pdev);
+	pci_dev_put(pdev);
 	if (!vsec)
 		return -ENODEV;
 
-	pci_dev_put(pdev);
 	name = devm_kasprintf(&plat_dev->dev, GFP_KERNEL, "dwc_rootport_%x", sbdf);
 	if (!name)
 		return -ENOMEM;
-- 
2.51.0