linux-kernel - [PATCH net v2] net:thunderx:Fix resource leaks in device_for_each_child

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Message-Id: <20230705143507.4120-1-machel@vivo.com>
Date:   Wed,  5 Jul 2023 22:34:56 +0800
From:   Wang Ming <machel@...o.com>
To:     Sunil Goutham <sgoutham@...vell.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        linux-arm-kernel@...ts.infradead.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     opensource.kernel@...o.com, Wang Ming <machel@...o.com>
Subject: [PATCH net v2] net:thunderx:Fix resource leaks in device_for_each_child_node() loops

The device_for_each_child_node() loop in
bgx_init_of_phy() function should have
wnode_handle_put() before break
which could avoid resource leaks.
This patch could fix this bug.

Signed-off-by: Wang Ming <machel@...o.com>
---
 drivers/net/ethernet/cavium/thunder/thunder_bgx.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/cavium/thunder/thunder_bgx.c b/drivers/net/ethernet/cavium/thunder/thunder_bgx.c
index a317feb8decb..dad32d36a015 100644
--- a/drivers/net/ethernet/cavium/thunder/thunder_bgx.c
+++ b/drivers/net/ethernet/cavium/thunder/thunder_bgx.c
@@ -1478,8 +1478,10 @@ static int bgx_init_of_phy(struct bgx *bgx)
 		 * cannot handle it, so exit the loop.
 		 */
 		node = to_of_node(fwn);
-		if (!node)
+		if (!node) {
+			fwnode_handle_put(fwn);
 			break;
+		}
 
 		of_get_mac_address(node, bgx->lmac[lmac].mac);
 
@@ -1503,6 +1505,7 @@ static int bgx_init_of_phy(struct bgx *bgx)
 		lmac++;
 		if (lmac == bgx->max_lmac) {
 			of_node_put(node);
+			fwnode_handle_put(fwn);
 			break;
 		}
 	}
-- 
2.25.1