[PATCH AUTOSEL 5.15 13/29] net: ethernet: ti: add missing of_node_put before return

Sasha Levin
2021-12-21T01:58:26Z

From: Wang Qing <wangqing@vivo.com>

[ Upstream commit be565ec71d1d59438bed0c7ed0a252a327e0b0ef ]

Fix following coccicheck warning:
WARNING: Function "for_each_child_of_node"
should have of_node_put() before return.

Early exits from for_each_child_of_node should decrement the
node reference counter.

Signed-off-by: Wang Qing <wangqing@vivo.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/ethernet/ti/am65-cpsw-nuss.c | 29 ++++++++++++++++--------
1 file changed, 20 insertions(+), 9 deletions(-)

diff --git a/drivers/net/ethernet/ti/am65-cpsw-nuss.c b/drivers/net/ethernet/ti/am65-cpsw-nuss.c
index 130346f74ee8a..8829926e2c676 100644
--- a/drivers/net/ethernet/ti/am65-cpsw-nuss.c
+++ b/drivers/net/ethernet/ti/am65-cpsw-nuss.c
@@ -1844,13 +1844,14 @@ static int am65_cpsw_nuss_init_slave_ports(struct am65_cpsw_common *common)
if (ret < 0) {
dev_err(dev, "%pOF error reading port_id %d\n",
port_np, ret);
- return ret;
+ goto of_node_put;
}

if (!port_id || port_id > common->port_num) {
dev_err(dev, "%pOF has invalid port_id %u %s\n",
port_np, port_id, port_np->name);
- return -EINVAL;
+ ret = -EINVAL;
+ goto of_node_put;
}

port = am65_common_get_port(common, port_id);
@@ -1866,8 +1867,10 @@ static int am65_cpsw_nuss_init_slave_ports(struct am65_cpsw_common *common)
(AM65_CPSW_NU_FRAM_PORT_OFFSET * (port_id - 1));

port->slave.mac_sl = cpsw_sl_get("am65", dev, port->port_base);
- if (IS_ERR(port->slave.mac_sl))
- return PTR_ERR(port->slave.mac_sl);
+ if (IS_ERR(port->slave.mac_sl)) {
+ ret = PTR_ERR(port->slave.mac_sl);
+ goto of_node_put;
+ }

port->disabled = !of_device_is_available(port_np);
if (port->disabled) {
@@ -1880,7 +1883,7 @@ static int am65_cpsw_nuss_init_slave_ports(struct am65_cpsw_common *common)
ret = PTR_ERR(port->slave.ifphy);
dev_err(dev, "%pOF error retrieving port phy: %d\n",
port_np, ret);
- return ret;
+ goto of_node_put;
}

port->slave.mac_only =
@@ -1889,10 +1892,12 @@ static int am65_cpsw_nuss_init_slave_ports(struct am65_cpsw_common *common)
/* get phy/link info */
if (of_phy_is_fixed_link(port_np)) {
ret = of_phy_register_fixed_link(port_np);
- if (ret)
- return dev_err_probe(dev, ret,
+ if (ret) {
+ ret = dev_err_probe(dev, ret,
"failed to register fixed-link phy %pOF\n",
port_np);
+ goto of_node_put;
+ }
port->slave.phy_node = of_node_get(port_np);
} else {
port->slave.phy_node =
@@ -1902,14 +1907,15 @@ static int am65_cpsw_nuss_init_slave_ports(struct am65_cpsw_common *common)
if (!port->slave.phy_node) {
dev_err(dev,
"slave[%d] no phy found\n", port_id);
- return -ENODEV;
+ ret = -ENODEV;
+ goto of_node_put;
}

ret = of_get_phy_mode(port_np, &port->slave.phy_if);
if (ret) {
dev_err(dev, "%pOF read phy-mode err %d\n",
port_np, ret);
- return ret;
+ goto of_node_put;
}

ret = of_get_mac_address(port_np, port->slave.mac_addr);
@@ -1932,6 +1938,11 @@ static int am65_cpsw_nuss_init_slave_ports(struct am65_cpsw_common *common)
}

return 0;
+
+of_node_put:
+ of_node_put(port_np);
+ of_node_put(node);
+ return ret;
}

static void am65_cpsw_pcpu_stats_free(void *data)
--
2.34.1