From: Liang He windhl@126.com
stable inclusion from stable-v5.10.146 commit aa11dae059a439af82bae541b134f8f53ac177b5 category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I6D0VX
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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[ Upstream commit f9fdb0b86f087c2b7f6c6168dd0985a3c1eda87e ]
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: d70241913413 ("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 Signed-off-by: Jialin Zhang zhangjialin11@huawei.com Reviewed-by: Zheng Zengkai zhengzengkai@huawei.com --- drivers/dma/ti/k3-udma-private.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/dma/ti/k3-udma-private.c b/drivers/dma/ti/k3-udma-private.c index 8563a392f30b..dadab2feca08 100644 --- a/drivers/dma/ti/k3-udma-private.c +++ b/drivers/dma/ti/k3-udma-private.c @@ -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");