[PATCH] As the doc of of_parse_phandle() states: "The device_node pointer with refcount incremented. Use * of_node_put() on it when done."

[Miaoqian Lin]

The function doesn't calls
of_node_put() to release this reference, causing a reference leak.

Move the of_parse_phandle() call after devm_kzalloc() and add the missing
of_node_put() call immediately after of_address_to_resource() to properly
release the device node reference.

Found via static analysis.

Fixes: 9a10c7e6519b ("drm/simpledrm: Add support for system memory 
framebuffers")
Cc: sta...@vger.kernel.org
Signed-off-by: Miaoqian Lin <linmq...@gmail.com>
---
 drivers/gpu/drm/sysfb/simpledrm.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/sysfb/simpledrm.c 
b/drivers/gpu/drm/sysfb/simpledrm.c
index 8530a3ef8a7a..f0bd7e958398 100644
--- a/drivers/gpu/drm/sysfb/simpledrm.c
+++ b/drivers/gpu/drm/sysfb/simpledrm.c
@@ -183,15 +183,16 @@ simplefb_get_memory_of(struct drm_device *dev, struct 
device_node *of_node)
        struct resource *res;
        int err;
 
-       np = of_parse_phandle(of_node, "memory-region", 0);
-       if (!np)
-               return NULL;
-
        res = devm_kzalloc(dev->dev, sizeof(*res), GFP_KERNEL);
        if (!res)
                return ERR_PTR(-ENOMEM);
 
+       np = of_parse_phandle(of_node, "memory-region", 0);
+       if (!np)
+               return NULL;
+
        err = of_address_to_resource(np, 0, res);
+       of_node_put(np);
        if (err)
                return ERR_PTR(err);
 
-- 
2.35.1