netdev - [PATCH net v2] net: pcs: Add missing put_device call in miic

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Date: Thu, 10 Aug 2023 22:06:39 +0800
From: Xiang Yang <xiangyang@...weicloud.com>
To: clement.leger@...tlin.com,
	andrew@...n.ch,
	hkallweit1@...il.com,
	linux@...linux.org.uk,
	davem@...emloft.net,
	edumazet@...gle.com,
	kuba@...nel.org,
	pabeni@...hat.com,
	olteanv@...il.com,
	f.fainelli@...il.com
Cc: linux-renesas-soc@...r.kernel.org,
	netdev@...r.kernel.org,
	xiangyang3@...wei.com
Subject: [PATCH net v2] net: pcs: Add missing put_device call in miic_create

From: Xiang Yang <xiangyang3@...wei.com>

The reference of pdev->dev is taken by of_find_device_by_node, so
it should be released when not need anymore.

Fixes: 7dc54d3b8d91 ("net: pcs: add Renesas MII converter driver")
Signed-off-by: Xiang Yang <xiangyang3@...wei.com>
---
 drivers/net/pcs/pcs-rzn1-miic.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/net/pcs/pcs-rzn1-miic.c b/drivers/net/pcs/pcs-rzn1-miic.c
index e5d642c67a2c..97139c07130f 100644
--- a/drivers/net/pcs/pcs-rzn1-miic.c
+++ b/drivers/net/pcs/pcs-rzn1-miic.c
@@ -314,15 +314,21 @@ struct phylink_pcs *miic_create(struct device *dev, struct device_node *np)
 
 	pdev = of_find_device_by_node(pcs_np);
 	of_node_put(pcs_np);
-	if (!pdev || !platform_get_drvdata(pdev))
+	if (!pdev || !platform_get_drvdata(pdev)) {
+		if (pdev)
+			put_device(&pdev->dev);
 		return ERR_PTR(-EPROBE_DEFER);
+	}
 
 	miic_port = kzalloc(sizeof(*miic_port), GFP_KERNEL);
-	if (!miic_port)
+	if (!miic_port) {
+		put_device(&pdev->dev);
 		return ERR_PTR(-ENOMEM);
+	}
 
 	miic = platform_get_drvdata(pdev);
 	device_link_add(dev, miic->dev, DL_FLAG_AUTOREMOVE_CONSUMER);
+	put_device(&pdev->dev);
 
 	miic_port->miic = miic;
 	miic_port->port = port - 1;
-- 
2.34.1