linux-kernel - [PATCH 4.19 045/247] memory: ti-aemif: Drop child node when jumping out loop

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Message-Id: <20210301161033.878962466@linuxfoundation.org>
Date:   Mon,  1 Mar 2021 17:11:05 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Pan Bian <bianpan2016@....com>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.19 045/247] memory: ti-aemif: Drop child node when jumping out loop

From: Pan Bian <bianpan2016@....com>

[ Upstream commit 94e9dd43cf327366388c8f146bccdc6322c0d999 ]

Call of_node_put() to decrement the reference count of the child node
child_np when jumping out of the loop body of
for_each_available_child_of_node(), which is a macro that increments and
decrements the reference count of child node. If the loop is broken, the
reference of the child node should be dropped manually.

Fixes: 5a7c81547c1d ("memory: ti-aemif: introduce AEMIF driver")
Signed-off-by: Pan Bian <bianpan2016@....com>
Link: https://lore.kernel.org/r/20210121090359.61763-1-bianpan2016@163.com
Signed-off-by: Krzysztof Kozlowski <krzk@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/memory/ti-aemif.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/memory/ti-aemif.c b/drivers/memory/ti-aemif.c
index 475e5b3790edb..be3d978648f57 100644
--- a/drivers/memory/ti-aemif.c
+++ b/drivers/memory/ti-aemif.c
@@ -381,8 +381,10 @@ static int aemif_probe(struct platform_device *pdev)
 		 */
 		for_each_available_child_of_node(np, child_np) {
 			ret = of_aemif_parse_abus_config(pdev, child_np);
-			if (ret < 0)
+			if (ret < 0) {
+				of_node_put(child_np);
 				goto error;
+			}
 		}
 	} else if (pdata && pdata->num_abus_data > 0) {
 		for (i = 0; i < pdata->num_abus_data; i++, aemif->num_cs++) {
@@ -408,8 +410,10 @@ static int aemif_probe(struct platform_device *pdev)
 		for_each_available_child_of_node(np, child_np) {
 			ret = of_platform_populate(child_np, NULL,
 						   dev_lookup, dev);
-			if (ret < 0)
+			if (ret < 0) {
+				of_node_put(child_np);
 				goto error;
+			}
 		}
 	} else if (pdata) {
 		for (i = 0; i < pdata->num_sub_devices; i++) {
-- 
2.27.0