net: netsec: fix error handling in netsec_register_mdio()

[ Upstream commit abb49e2be0642d4447476b35bb5e1779889532b5 ]

If phy_device_register() fails, phy_device_free() need be called to
put refcount, so memory of phy device and device name can be freed
in callback function.

If get_phy_device() fails, mdiobus_unregister() need be called,
or it will cause warning in mdiobus_free() and kobject is leaked.

Fixes: 0d326cdbc883 ("net: socionext: Add Synquacer NetSec driver")
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://lore.kernel.org/r/20221019064104.3228892-1-yangyingliang@huawei.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/net/ethernet/socionext/netsec.c b/drivers/net/ethernet/socionext/netsec.c
index 33d7c2940ba9de5822f06c89720fb00895081ee3..5a672658da80e33edc28a8491d0afe73cf14df99 100644 (file)
--- a/drivers/net/ethernet/socionext/netsec.c
+++ b/drivers/net/ethernet/socionext/netsec.c
@@ -1936,11 +1936,13 @@ static int netsec_register_mdio(struct netsec_priv *priv, u32 phy_addr)
                        ret = PTR_ERR(priv->phydev);
                        dev_err(priv->dev, "get_phy_device err(%d)\n", ret);
                        priv->phydev = NULL;
+                       mdiobus_unregister(bus);
                        return -ENODEV;
                }
 
                ret = phy_device_register(priv->phydev);
                if (ret) {
+                       phy_device_free(priv->phydev);
                        mdiobus_unregister(bus);
                        dev_err(priv->dev,
                                "phy_device_register err(%d)\n", ret);