[PATCH] of: unittest: fix node leak in of_dma_get_max_cpu_address test

[Wentao Liang]

of_find_node_by_path() returns a device_node with its reference count
incremented. of_unittest_dma_get_max_cpu_address() passes the node to
of_dma_get_max_cpu_address(), which does not consume the reference, and
then returns without dropping it.

Release the reference after the check.

Fixes: 07d13a1d6120 ("of: unittest: Add test for of_dma_get_max_cpu_address()")
Cc: stable@xxxxxxxxxxxxxxx
Assisted-by: DeepSeek-V4.1-Flash and OpenAI Codex
Signed-off-by: Wentao Liang <vulab@xxxxxxxxxxx>
---
 drivers/of/unittest.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/of/unittest.c b/drivers/of/unittest.c
index d2f5c7ef3178..8133c954d335 100644
--- a/drivers/of/unittest.c
+++ b/drivers/of/unittest.c
@@ -1145,6 +1145,7 @@ static void __init of_unittest_dma_get_max_cpu_address(void)
 	unittest(cpu_addr == 0x4fffffff,
 		 "of_dma_get_max_cpu_address: wrong CPU addr %pad (expecting %x)\n",
 		 &cpu_addr, 0x4fffffff);
+	of_node_put(np);
 }
 
 static void __init of_unittest_dma_ranges_one(const char *path,
-- 
2.34.1