netdev - [PATCH -next 6/7] net: dsa: microchip: Use scoped function and _

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Message-ID: <20240827075219.3793198-7-ruanjinjie@huawei.com>
Date: Tue, 27 Aug 2024 15:52:18 +0800
From: Jinjie Ruan <ruanjinjie@...wei.com>
To: <woojung.huh@...rochip.com>, <andrew@...n.ch>, <f.fainelli@...il.com>,
	<olteanv@...il.com>, <davem@...emloft.net>, <edumazet@...gle.com>,
	<kuba@...nel.org>, <pabeni@...hat.com>, <linus.walleij@...aro.org>,
	<alsi@...g-olufsen.dk>, <justin.chen@...adcom.com>,
	<sebastian.hesselbarth@...il.com>, <alexandre.torgue@...s.st.com>,
	<joabreu@...opsys.com>, <mcoquelin.stm32@...il.com>, <wens@...e.org>,
	<jernej.skrabec@...il.com>, <samuel@...lland.org>, <hkallweit1@...il.com>,
	<linux@...linux.org.uk>, <ansuelsmth@...il.com>,
	<UNGLinuxDriver@...rochip.com>, <netdev@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, <bcm-kernel-feedback-list@...adcom.com>,
	<linux-arm-kernel@...ts.infradead.org>, <linux-sunxi@...ts.linux.dev>,
	<linux-stm32@...md-mailman.stormreply.com>, <krzk@...nel.org>,
	<jic23@...nel.org>
CC: <ruanjinjie@...wei.com>
Subject: [PATCH -next 6/7] net: dsa: microchip: Use scoped function and __free() to simplfy code

Avoids the need for manual cleanup of_node_put() in early exits
from the loop by using for_each_available_child_of_node_scoped()
and __free().

Signed-off-by: Jinjie Ruan <ruanjinjie@...wei.com>
---
 drivers/net/dsa/microchip/ksz_common.c | 12 ++++--------
 1 file changed, 4 insertions(+), 8 deletions(-)

diff --git a/drivers/net/dsa/microchip/ksz_common.c b/drivers/net/dsa/microchip/ksz_common.c
index cd3991792b69..8058a0b7c161 100644
--- a/drivers/net/dsa/microchip/ksz_common.c
+++ b/drivers/net/dsa/microchip/ksz_common.c
@@ -4595,7 +4595,6 @@ static int ksz_parse_drive_strength(struct ksz_device *dev)
 int ksz_switch_register(struct ksz_device *dev)
 {
 	const struct ksz_chip_data *info;
-	struct device_node *port, *ports;
 	phy_interface_t interface;
 	unsigned int port_num;
 	int ret;
@@ -4677,25 +4676,22 @@ int ksz_switch_register(struct ksz_device *dev)
 		ret = of_get_phy_mode(dev->dev->of_node, &interface);
 		if (ret == 0)
 			dev->compat_interface = interface;
-		ports = of_get_child_by_name(dev->dev->of_node, "ethernet-ports");
+		struct device_node *ports __free(device_node) =
+			of_get_child_by_name(dev->dev->of_node, "ethernet-ports");
 		if (!ports)
 			ports = of_get_child_by_name(dev->dev->of_node, "ports");
 		if (ports) {
-			for_each_available_child_of_node(ports, port) {
+			for_each_available_child_of_node_scoped(ports, port) {
 				if (of_property_read_u32(port, "reg",
 							 &port_num))
 					continue;
-				if (!(dev->port_mask & BIT(port_num))) {
-					of_node_put(port);
-					of_node_put(ports);
+				if (!(dev->port_mask & BIT(port_num)))
 					return -EINVAL;
-				}
 				of_get_phy_mode(port,
 						&dev->ports[port_num].interface);
 
 				ksz_parse_rgmii_delay(dev, port_num, port);
 			}
-			of_node_put(ports);
 		}
 		dev->synclko_125 = of_property_read_bool(dev->dev->of_node,
 							 "microchip,synclko-125");
-- 
2.34.1