linux-kernel - [PATCH] phy: rockchip-usb: Fix refcount leak in rockchip_init_usb

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Message-Id: <20250318143340.25162-1-linmq006@gmail.com>
Date: Tue, 18 Mar 2025 22:33:40 +0800
From: Miaoqian Lin <linmq006@...il.com>
To: Vinod Koul <vkoul@...nel.org>,
	Kishon Vijay Abraham I <kishon@...nel.org>,
	Heiko Stuebner <heiko@...ech.de>,
	linux-phy@...ts.infradead.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-rockchip@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Cc: linmq006@...il.com
Subject: [PATCH] phy: rockchip-usb: Fix refcount leak in rockchip_init_usb_uart

Fix a reference counter leak in rockchip_init_usb_uart() where
of_node_put(np) was missing after of_find_matching_node_and_match().

Fixes: 605df8af33a7 ("phy: rockchip-usb: add handler for usb-uart functionality")
Signed-off-by: Miaoqian Lin <linmq006@...il.com>
---
 drivers/phy/rockchip/phy-rockchip-usb.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/phy/rockchip/phy-rockchip-usb.c b/drivers/phy/rockchip/phy-rockchip-usb.c
index 666a896c8f0a..de7d879bb460 100644
--- a/drivers/phy/rockchip/phy-rockchip-usb.c
+++ b/drivers/phy/rockchip/phy-rockchip-usb.c
@@ -539,6 +539,7 @@ static int __init rockchip_init_usb_uart(void)
 	if (!data->init_usb_uart) {
 		pr_err("%s: usb-uart not available on %s\n",
 		       __func__, match->compatible);
+		of_node_put(np);
 		return -ENOTSUPP;
 	}
 
@@ -547,6 +548,7 @@ static int __init rockchip_init_usb_uart(void)
 		grf = syscon_node_to_regmap(np->parent);
 	if (IS_ERR(grf))
 		grf = syscon_regmap_lookup_by_phandle(np, "rockchip,grf");
+	of_node_put(np);
 	if (IS_ERR(grf)) {
 		pr_err("%s: Missing rockchip,grf property, %lu\n",
 		       __func__, PTR_ERR(grf));
-- 
2.39.5 (Apple Git-154)