This is a note to let you know that I've just added the patch titled PCI: mediatek: Add missing of_node_put() to fix reference leak to the 5.10-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: pci-mediatek-add-missing-of_node_put-to-fix-referenc.patch and it can be found in the queue-5.10 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit e1649c758ddf4e6adc0a349a912efd71a9568191 Author: Krzysztof WilczyÅ?ski <kw@xxxxxxxxx> Date: Wed Jan 20 18:48:10 2021 +0000 PCI: mediatek: Add missing of_node_put() to fix reference leak [ Upstream commit 42814c438aac79746d310f413a27d5b0b959c5de ] The for_each_available_child_of_node helper internally makes use of the of_get_next_available_child() which performs an of_node_get() on each iteration when searching for next available child node. Should an available child node be found, then it would return a device node pointer with reference count incremented, thus early return from the middle of the loop requires an explicit of_node_put() to prevent reference count leak. To stop the reference leak, explicitly call of_node_put() before returning after an error occurred. Link: https://lore.kernel.org/r/20210120184810.3068794-1-kw@xxxxxxxxx Signed-off-by: Krzysztof WilczyÅ?ski <kw@xxxxxxxxx> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@xxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/pci/controller/pcie-mediatek.c b/drivers/pci/controller/pcie-mediatek.c index cf4c18f0c25a..23548b517e4b 100644 --- a/drivers/pci/controller/pcie-mediatek.c +++ b/drivers/pci/controller/pcie-mediatek.c @@ -1035,14 +1035,14 @@ static int mtk_pcie_setup(struct mtk_pcie *pcie) err = of_pci_get_devfn(child); if (err < 0) { dev_err(dev, "failed to parse devfn: %d\n", err); - return err; + goto error_put_node; } slot = PCI_SLOT(err); err = mtk_pcie_parse_port(pcie, child, slot); if (err) - return err; + goto error_put_node; } err = mtk_pcie_subsys_powerup(pcie); @@ -1058,6 +1058,9 @@ static int mtk_pcie_setup(struct mtk_pcie *pcie) mtk_pcie_subsys_powerdown(pcie); return 0; +error_put_node: + of_node_put(child); + return err; } static int mtk_pcie_probe(struct platform_device *pdev)