linux-kernel - [PATCH] mtd: maps: Fix refcount leak in ap_flash

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Date:   Mon, 23 May 2022 18:32:55 +0400
From:   Miaoqian Lin <linmq006@...il.com>
To:     Linus Walleij <linus.walleij@...aro.org>,
        Miquel Raynal <miquel.raynal@...tlin.com>,
        Richard Weinberger <richard@....at>,
        Vignesh Raghavendra <vigneshr@...com>,
        linux-arm-kernel@...ts.infradead.org,
        linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc:     linmq006@...il.com
Subject: [PATCH] mtd: maps: Fix refcount leak in ap_flash_init

of_find_matching_node() returns a node pointer with refcount
incremented, we should use of_node_put() on it when not need anymore.
Add missing of_node_put() to avoid refcount leak.

Fixes: b0afd44bc192 ("mtd: physmap_of: add a hook for Versatile write protection")
Signed-off-by: Miaoqian Lin <linmq006@...il.com>
---
 drivers/mtd/maps/physmap-versatile.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/mtd/maps/physmap-versatile.c b/drivers/mtd/maps/physmap-versatile.c
index ad7cd9cfaee0..6ba6a1dd127c 100644
--- a/drivers/mtd/maps/physmap-versatile.c
+++ b/drivers/mtd/maps/physmap-versatile.c
@@ -93,6 +93,7 @@ static int ap_flash_init(struct platform_device *pdev)
 		return -ENODEV;
 	}
 	ebi_base = of_iomap(ebi, 0);
+	of_node_put(ebi);
 	if (!ebi_base)
 		return -ENODEV;
 
-- 
2.25.1