[PATCH 5.19 0800/1157] of: device: Fix missing of_node_put() in of_dma_set_restricted_buffer

Greg Kroah-Hartman
2022-08-16T00:29:18Z

From: Liang He <windhl@126.com>

[ Upstream commit d17e37c41b7ed38459957a5d2968ba61516fd5c2 ]

We should use of_node_put() for the reference 'node' returned by
of_parse_phandle() which will increase the refcount.

Fixes: fec9b625095f ("of: Add plumbing for restricted DMA pool")
Co-authored-by: Miaoqian Lin <linmq006@gmail.com>
Signed-off-by: Liang He <windhl@126.com>
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20220702014449.263772-1-windhl@126.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/of/device.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/of/device.c b/drivers/of/device.c
index 874f031442dc..75b6cbffa755 100644
--- a/drivers/of/device.c
+++ b/drivers/of/device.c
@@ -81,8 +81,11 @@ of_dma_set_restricted_buffer(struct device *dev, struct device_node *np)
* restricted-dma-pool region is allowed.
*/
if (of_device_is_compatible(node, "restricted-dma-pool") &&
- of_device_is_available(node))
+ of_device_is_available(node)) {
+ of_node_put(node);
break;
+ }
+ of_node_put(node);
}

/*
--
2.35.1