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PCI: brcmstb: Fix missing of_node_put() in brcm_pcie_probe()

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commit 2df181e1aea4628a8fd257f866026625d0519627 upstream.

A call to of_parse_phandle() is incrementing the refcount, and as such,
the of_node_put() must be called when the reference is no longer needed.

Thus, refactor the existing code and add a missing of_node_put() call
following the check to ensure that "msi_np" matches "pcie->np" and after
MSI initialization, but only if the MSI support is enabled system-wide.

Cc: stable@vger.kernel.org # v5.10+
Fixes: 40ca1bf580 ("PCI: brcmstb: Add MSI support")
Signed-off-by: Stanimir Varbanov <svarbanov@suse.de>
Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20250122222955.1752778-1-svarbanov@suse.de
[kwilczynski: commit log]
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Stanimir Varbanov
2025-01-23 00:29:55 +02:00
committed by Greg Kroah-Hartman
parent 712d84459a
commit 71bf0769a6
1 changed files with 9 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files
drivers/pci/controller/pcie-brcmstb.c
+9 -4
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@@ -1786,7 +1786,7 @@ static struct pci_ops brcm7425_pcie_ops = {
static int brcm_pcie_probe(struct platform_device *pdev) 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; struct pci_host_bridge *bridge;
const struct pcie_cfg_data *data; const struct pcie_cfg_data *data;
struct brcm_pcie *pcie; struct brcm_pcie *pcie;
@@ -1890,9 +1890,14 @@ static int brcm_pcie_probe(struct platform_device *pdev)
goto fail; goto fail;
} }
msi_np = of_parse_phandle(pcie->np, "msi-parent", 0); if (pci_msi_enabled()) {
if (pci_msi_enabled() && msi_np == pcie->np) { struct device_node *msi_np = of_parse_phandle(pcie->np, "msi-parent", 0);
ret = brcm_pcie_enable_msi(pcie);
if (msi_np == pcie->np)
ret = brcm_pcie_enable_msi(pcie);
of_node_put(msi_np);
if (ret) { if (ret) {
dev_err(pcie->dev, "probe of internal MSI failed"); dev_err(pcie->dev, "probe of internal MSI failed");
goto fail; goto fail;