linux-kernel - [PATCH] ethernet: Fix error handling in xemaclite_of

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Date:   Tue,  8 Mar 2022 02:47:49 +0000
From:   Miaoqian Lin <linmq006@...il.com>
To:     "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Michal Simek <michal.simek@...inx.com>,
        Arnd Bergmann <arnd@...db.de>, Andrew Lunn <andrew@...n.ch>,
        Miaoqian Lin <linmq006@...il.com>,
        Michael Walle <michael@...le.cc>,
        Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>,
        YueHaibing <yuehaibing@...wei.com>,
        John Linn <john.linn@...inx.com>,
        Grant Likely <grant.likely@...retlab.ca>,
        Sadanand Mutyala <Sadanand.Mutyala@...inx.com>,
        netdev@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] ethernet: Fix error handling in xemaclite_of_probe

This node pointer is returned by of_parse_phandle() with refcount
incremented in this function. Calling of_node_put() to avoid the
refcount leak. As the remove function do.

Fixes: 5cdaaa12866e ("net: emaclite: adding MDIO and phy lib support")
Signed-off-by: Miaoqian Lin <linmq006@...il.com>
---
 drivers/net/ethernet/xilinx/xilinx_emaclite.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/xilinx/xilinx_emaclite.c b/drivers/net/ethernet/xilinx/xilinx_emaclite.c
index 519599480b15..77fa2cb03aca 100644
--- a/drivers/net/ethernet/xilinx/xilinx_emaclite.c
+++ b/drivers/net/ethernet/xilinx/xilinx_emaclite.c
@@ -1183,7 +1183,7 @@ static int xemaclite_of_probe(struct platform_device *ofdev)
 	if (rc) {
 		dev_err(dev,
 			"Cannot register network device, aborting\n");
-		goto error;
+		goto put_node;
 	}
 
 	dev_info(dev,
@@ -1191,6 +1191,8 @@ static int xemaclite_of_probe(struct platform_device *ofdev)
 		 (unsigned long __force)ndev->mem_start, lp->base_addr, ndev->irq);
 	return 0;
 
+put_node:
+	of_node_put(lp->phy_node);
 error:
 	free_netdev(ndev);
 	return rc;
-- 
2.17.1