linux-kernel - [PATCH] phy: Fix error handling in tegra_xusb_port

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Message-Id: <20241217074457.2909598-1-make_ruc2021@163.com>
Date: Tue, 17 Dec 2024 15:44:57 +0800
From: Ma Ke <make_ruc2021@....com>
To: jckuo@...dia.com,
	vkoul@...nel.org,
	kishon@...nel.org,
	thierry.reding@...il.com,
	jonathanh@...dia.com
Cc: linux-phy@...ts.infradead.org,
	linux-tegra@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Ma Ke <make_ruc2021@....com>,
	stable@...r.kernel.org
Subject: [PATCH] phy: Fix error handling in tegra_xusb_port_init

The reference count of the device incremented in device_initialize() is
not decremented when device_add() fails. Add a put_device() call before
returning from the function to decrement reference count for cleanup.
Or it could cause memory leak.

Found by code review.

Cc: stable@...r.kernel.org
Fixes: 53d2a715c240 ("phy: Add Tegra XUSB pad controller support")
Signed-off-by: Ma Ke <make_ruc2021@....com>
---
 drivers/phy/tegra/xusb.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/phy/tegra/xusb.c b/drivers/phy/tegra/xusb.c
index 79d4814d758d..c89df95aa6ca 100644
--- a/drivers/phy/tegra/xusb.c
+++ b/drivers/phy/tegra/xusb.c
@@ -548,16 +548,16 @@ static int tegra_xusb_port_init(struct tegra_xusb_port *port,
 
 	err = dev_set_name(&port->dev, "%s-%u", name, index);
 	if (err < 0)
-		goto unregister;
+		goto put_device;
 
 	err = device_add(&port->dev);
 	if (err < 0)
-		goto unregister;
+		goto put_device;
 
 	return 0;
 
-unregister:
-	device_unregister(&port->dev);
+put_device:
+	put_device(&port->dev);
 	return err;
 }
 
-- 
2.25.1