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dmaengine: ti: k3-udma-private: Fix refcount leak bug in of_xudma_dev_get()

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[ Upstream commit f9fdb0b86f ]

We should call of_node_put() for the reference returned by
of_parse_phandle() in fail path or when it is not used anymore.
Here we only need to move the of_node_put() before the check.

Fixes: d702419134 ("dmaengine: ti: k3-udma: Add glue layer for non DMAengine users")
Signed-off-by: Liang He <windhl@126.com>
Acked-by: Peter Ujfalusi <peter.ujfalusi@gmail.com>
Link: https://lore.kernel.org/r/20220720073234.1255474-1-windhl@126.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Liang He
2022-07-20 15:32:34 +08:00
committed by Greg Kroah-Hartman
parent 1cc871fe6d
commit aa11dae059
1 changed files with 3 additions and 3 deletions
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6
drivers/dma/ti/k3-udma-private.c
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@@ -31,14 +31,14 @@ struct udma_dev *of_xudma_dev_get(struct device_node *np, const char *property)
}
pdev = of_find_device_by_node(udma_node);
if (np != udma_node)
of_node_put(udma_node);
if (!pdev) {
pr_debug("UDMA device not found\n");
return ERR_PTR(-EPROBE_DEFER);
}
if (np != udma_node)
of_node_put(udma_node);
ud = platform_get_drvdata(pdev);
if (!ud) {
pr_debug("UDMA has not been probed\n");