linux-kernel - [PATCH] phy: ti: j721e-wiz: Fix refcount leak in wiz_get_lane_phy

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Message-Id: <20220602130906.18095-1-linmq006@gmail.com>
Date:   Thu,  2 Jun 2022 17:09:03 +0400
From:   Miaoqian Lin <linmq006@...il.com>
To:     Kishon Vijay Abraham I <kishon@...com>,
        Vinod Koul <vkoul@...nel.org>,
        Randy Dunlap <rdunlap@...radead.org>,
        Miaoqian Lin <linmq006@...il.com>,
        linux-phy@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH] phy: ti: j721e-wiz: Fix refcount leak in wiz_get_lane_phy_types

of_get_child_by_name() 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: format:7ae14cf581f2 ("phy: ti: j721e-wiz: Implement DisplayPort mode to the wiz driver")
Signed-off-by: Miaoqian Lin <linmq006@...il.com>
---
 drivers/phy/ti/phy-j721e-wiz.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/phy/ti/phy-j721e-wiz.c b/drivers/phy/ti/phy-j721e-wiz.c
index da546c35d1d5..c6b53d4f6643 100644
--- a/drivers/phy/ti/phy-j721e-wiz.c
+++ b/drivers/phy/ti/phy-j721e-wiz.c
@@ -1113,6 +1113,7 @@ static int wiz_get_lane_phy_types(struct device *dev, struct wiz *wiz)
 		ret = of_property_read_u32(subnode, "reg", &reg);
 		if (ret) {
 			of_node_put(subnode);
+			of_node_put(serdes);
 			dev_err(dev,
 				"%s: Reading \"reg\" from \"%s\" failed: %d\n",
 				__func__, subnode->name, ret);
@@ -1127,6 +1128,7 @@ static int wiz_get_lane_phy_types(struct device *dev, struct wiz *wiz)
 		for (i = reg; i < reg + num_lanes; i++)
 			wiz->lane_phy_type[i] = phy_type;
 	}
+	of_node_put(serdes);
 
 	return 0;
 }
-- 
2.25.1