linux-kernel - [PATCH 5.4 108/255] memory: pl353-smc: Fix refcount leak bug in pl353_smc

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Message-Id: <20221024113006.059859095@linuxfoundation.org>
Date:   Mon, 24 Oct 2022 13:30:18 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Liang He <windhl@....com>,
        Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.4 108/255] memory: pl353-smc: Fix refcount leak bug in pl353_smc_probe()

From: Liang He <windhl@....com>

[ Upstream commit 61b3c876c1cbdb1efd1f52a1f348580e6e14efb6 ]

The break of for_each_available_child_of_node() needs a
corresponding of_node_put() when the reference 'child' is not
used anymore. Here we do not need to call of_node_put() in
fail path as '!match' means no break.

While the of_platform_device_create() will created a new
reference by 'child' but it has considered the refcounting.

Fixes: fee10bd22678 ("memory: pl353: Add driver for arm pl353 static memory controller")
Signed-off-by: Liang He <windhl@....com>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Link: https://lore.kernel.org/r/20220716031324.447680-1-windhl@126.com
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/memory/pl353-smc.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/memory/pl353-smc.c b/drivers/memory/pl353-smc.c
index cc01979780d8..322d7ead0031 100644
--- a/drivers/memory/pl353-smc.c
+++ b/drivers/memory/pl353-smc.c
@@ -416,6 +416,7 @@ static int pl353_smc_probe(struct amba_device *adev, const struct amba_id *id)
 	if (init)
 		init(adev, child);
 	of_platform_device_create(child, NULL, &adev->dev);
+	of_node_put(child);
 
 	return 0;
 
-- 
2.35.1