[v2] PCI: brcmstb: Fix for missing of_node_put

Commit Message

Stanimir Varbanov Jan. 22, 2025, 10:29 p.m. UTC

A call to of_parse_phandle() is incrementing the refcount, of_node_put
must be called when done the work on it. Add missing of_node_put() after
the check for msi_np == np and MSI initialization.

Cc: [e-mail] # v5.10+
Fixes: 40ca1bf580ef ("PCI: brcmstb: Add MSI support")
Signed-off-by: Stanimir Varbanov <[e-mail]>
---
v1 -> v2:
 - Use of_node_put instead of cleanups (Florian).
 - Sent the patch separately from PCIe 2712 series (Florian).

 drivers/pci/controller/pcie-brcmstb.c | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

Patch

diff --git a/drivers/pci/controller/pcie-brcmstb.c b/drivers/pci/controller/pcie-brcmstb.c
index 744fe1a4cf9c..d171ee61eab3 100644
--- a/drivers/pci/controller/pcie-brcmstb.c
+++ b/drivers/pci/controller/pcie-brcmstb.c
@@ -1844,7 +1844,7 @@  static struct pci_ops brcm7425_pcie_ops = {
 
 static int brcm_pcie_probe(struct platform_device *pdev)
 {
-	struct device_node *np = pdev->dev.of_node, *msi_np;
+	struct device_node *np = pdev->dev.of_node;
 	struct pci_host_bridge *bridge;
 	const struct pcie_cfg_data *data;
 	struct brcm_pcie *pcie;
@@ -1944,9 +1944,14 @@  static int brcm_pcie_probe(struct platform_device *pdev)
 		goto fail;
 	}
 
-	msi_np = of_parse_phandle(pcie->np, "msi-parent", 0);
-	if (pci_msi_enabled() && msi_np == pcie->np) {
-		ret = brcm_pcie_enable_msi(pcie);
+	if (pci_msi_enabled()) {
+		struct device_node *msi_np = of_parse_phandle(pcie->np, "msi-parent", 0);
+
+		if (msi_np == pcie->np)
+			ret = brcm_pcie_enable_msi(pcie);
+
+		of_node_put(msi_np);
+
 		if (ret) {
 			dev_err(pcie->dev, "probe of internal MSI failed");
 			goto fail;