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| author | Krzysztof Wilczyński <kw@linux.com> | 2021-01-20 18:48:10 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-03-17 17:03:44 +0100 |
| commit | e622e01d44e4fb17a8eb21e5d791400ae789674e (patch) | |
| tree | e1d5a6ed36ac720f567892d03dafec18f931ad95 /drivers/pci/controller | |
| parent | d54c77959eceb3704067d874ac64ed660e765ae7 (diff) | |
| download | linux-e622e01d44e4fb17a8eb21e5d791400ae789674e.tar.gz linux-e622e01d44e4fb17a8eb21e5d791400ae789674e.tar.bz2 linux-e622e01d44e4fb17a8eb21e5d791400ae789674e.zip | |
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@linux.com
Signed-off-by: Krzysztof Wilczyński <kw@linux.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/pci/controller')
| -rw-r--r-- | drivers/pci/controller/pcie-mediatek.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/pci/controller/pcie-mediatek.c b/drivers/pci/controller/pcie-mediatek.c index 626a7c352dfd..728a59655825 100644 --- a/drivers/pci/controller/pcie-mediatek.c +++ b/drivers/pci/controller/pcie-mediatek.c @@ -1063,14 +1063,14 @@ 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); @@ -1086,6 +1086,9 @@ 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) |