of: device: Fix missing of_node_put() in of_dma_set_restricted_buffer

[ 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>

diff --git a/drivers/of/device.c b/drivers/of/device.c
index b0800c260f64a219848888eee8762fafee0aef64..45335fe523f7d01e0c990acda6d5d7ad06b1fa9e 100644 (file)
--- 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);
        }
 
        /*