net: ethernet: Fix memleak in ethoc_probe

[ Upstream commit 5d41f9b7ee7a5a5138894f58846a4ffed601498a ]

When mdiobus_register() fails, priv->mdio allocated
by mdiobus_alloc() has not been freed, which leads
to memleak.

Fixes: e7f4dc3536a4 ("mdio: Move allocation of interrupts into core")
Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://lore.kernel.org/r/20201223110615.31389-1-dinghao.liu@zju.edu.cn
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/net/ethernet/ethoc.c b/drivers/net/ethernet/ethoc.c
index 0981fe9..3d9b0b1 100644 (file)
--- a/drivers/net/ethernet/ethoc.c
+++ b/drivers/net/ethernet/ethoc.c
@@ -1211,7 +1211,7 @@ static int ethoc_probe(struct platform_device *pdev)
        ret = mdiobus_register(priv->mdio);
        if (ret) {
                dev_err(&netdev->dev, "failed to register MDIO bus\n");
-               goto free2;
+               goto free3;
        }
 
        ret = ethoc_mdio_probe(netdev);
@@ -1243,6 +1243,7 @@ error2:
        netif_napi_del(&priv->napi);
 error:
        mdiobus_unregister(priv->mdio);
+free3:
        mdiobus_free(priv->mdio);
 free2:
        clk_disable_unprepare(priv->clk);