netdev - [PATCH 2/2] net: hns: switch to scoped device_for_each_child

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Message-Id: <20240930-net-device_for_each_child_node_scoped-v1-2-bbdd7f9fd649@gmail.com>
Date: Mon, 30 Sep 2024 22:03:30 +0200
From: Javier Carrasco <javier.carrasco.cruz@...il.com>
To: Andrew Lunn <andrew@...n.ch>, Heiner Kallweit <hkallweit1@...il.com>, 
 Russell King <linux@...linux.org.uk>, 
 "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, 
 Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, 
 Yisen Zhuang <yisen.zhuang@...wei.com>, 
 Salil Mehta <salil.mehta@...wei.com>
Cc: netdev@...r.kernel.org, linux-kernel@...r.kernel.org, 
 Javier Carrasco <javier.carrasco.cruz@...il.com>
Subject: [PATCH 2/2] net: hns: switch to scoped
 device_for_each_child_node()

Use device_for_each_child_node_scoped() to simplify the code by removing
the need for explicit calls to fwnode_handle_put() in every error path.
This approach also accounts for any error path that could be added.

Signed-off-by: Javier Carrasco <javier.carrasco.cruz@...il.com>
---
 drivers/net/ethernet/hisilicon/hns/hns_dsaf_mac.c | 10 +++-------
 1 file changed, 3 insertions(+), 7 deletions(-)

diff --git a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_mac.c b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_mac.c
index 58baac7103b3..5fa9b2eeb929 100644
--- a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_mac.c
+++ b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_mac.c
@@ -1090,28 +1090,24 @@ int hns_mac_init(struct dsaf_device *dsaf_dev)
 	u32 port_id;
 	int max_port_num = hns_mac_get_max_port_num(dsaf_dev);
 	struct hns_mac_cb *mac_cb;
-	struct fwnode_handle *child;

-	device_for_each_child_node(dsaf_dev->dev, child) {
+	device_for_each_child_node_scoped(dsaf_dev->dev, child) {
 		ret = fwnode_property_read_u32(child, "reg", &port_id);
 		if (ret) {
-			fwnode_handle_put(child);
 			dev_err(dsaf_dev->dev,
 				"get reg fail, ret=%d!\n", ret);
 			return ret;
 		}
 		if (port_id >= max_port_num) {
-			fwnode_handle_put(child);
 			dev_err(dsaf_dev->dev,
 				"reg(%u) out of range!\n", port_id);
 			return -EINVAL;
 		}
 		mac_cb = devm_kzalloc(dsaf_dev->dev, sizeof(*mac_cb),
 				      GFP_KERNEL);
-		if (!mac_cb) {
-			fwnode_handle_put(child);
+		if (!mac_cb)
 			return -ENOMEM;
-		}
+
 		mac_cb->fw_port = child;
 		mac_cb->mac_id = (u8)port_id;
 		dsaf_dev->mac_cb[port_id] = mac_cb;

-- 
2.43.0