[PATCH 6.19 317/781] PCI: xilinx: Fix INTx IRQ domain leak in error paths

Greg Kroah-Hartman
2026-02-25T01:32:44Z

From: Haotian Zhang <vulab@iscas.ac.cn>

[ Upstream commit f42b3c053b1554d66af6fe45bb1ef357464c0456 ]

In xilinx_pcie_init_irq_domain(), if xilinx_allocate_msi_domains() fails
after pcie->leg_domain has been successfully created via
irq_domain_create_linear(), the function returns directly without cleaning
up the allocated IRQ domain, resulting in a resource leak. In
xilinx_free_msi_domains(), pcie->leg_domain is also neglected.

Add irq_domain_remove() call in the error path to properly release the
IRQ domain before returning the error. Also rename
xilinx_free_msi_domains() to xilinx_free_irq_domains() and add the release
of pcie->leg_domain to it.

Fixes: 313b64c3ae52 ("PCI: xilinx: Convert to MSI domains")
Suggested-by: Manivannan Sadhasivam <mani@kernel.org>
Signed-off-by: Haotian Zhang <vulab@iscas.ac.cn>
Signed-off-by: Manivannan Sadhasivam <mani@kernel.org>
Link: https://patch.msgid.link/20251219021615.965-1-vulab@iscas.ac.cn
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/pci/controller/pcie-xilinx.c | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/pci/controller/pcie-xilinx.c b/drivers/pci/controller/pcie-xilinx.c
index 937ea6ae1ac48..4aa139abac16e 100644
--- a/drivers/pci/controller/pcie-xilinx.c
+++ b/drivers/pci/controller/pcie-xilinx.c
@@ -302,9 +302,10 @@ static int xilinx_allocate_msi_domains(struct xilinx_pcie *pcie)
return 0;
}

-static void xilinx_free_msi_domains(struct xilinx_pcie *pcie)
+static void xilinx_free_irq_domains(struct xilinx_pcie *pcie)
{
irq_domain_remove(pcie->msi_domain);
+ irq_domain_remove(pcie->leg_domain);
}

/* INTx Functions */
@@ -480,8 +481,10 @@ static int xilinx_pcie_init_irq_domain(struct xilinx_pcie *pcie)
phys_addr_t pa = ALIGN_DOWN(virt_to_phys(pcie), SZ_4K);

ret = xilinx_allocate_msi_domains(pcie);
- if (ret)
+ if (ret) {
+ irq_domain_remove(pcie->leg_domain);
return ret;
+ }

pcie_write(pcie, upper_32_bits(pa), XILINX_PCIE_REG_MSIBASE1);
pcie_write(pcie, lower_32_bits(pa), XILINX_PCIE_REG_MSIBASE2);
@@ -600,7 +603,7 @@ static int xilinx_pcie_probe(struct platform_device *pdev)

err = pci_host_probe(bridge);
if (err)
- xilinx_free_msi_domains(pcie);
+ xilinx_free_irq_domains(pcie);

return err;
}
--
2.51.0