[PATCH] net: arc_emac: Fix memleak in arc_mdio_probe

[Dinghao Liu]

When devm_gpiod_get_optional() fails, bus should be
freed just like when of_mdiobus_register() fails.

Fixes: 1bddd96cba03d ("net: arc_emac: support the phy reset for emac driver")
Signed-off-by: Dinghao Liu <dinghao....@zju.edu.cn>
---
 drivers/net/ethernet/arc/emac_mdio.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/ethernet/arc/emac_mdio.c 
b/drivers/net/ethernet/arc/emac_mdio.c
index 0187dbf3b87d..54cdafdd067d 100644
--- a/drivers/net/ethernet/arc/emac_mdio.c
+++ b/drivers/net/ethernet/arc/emac_mdio.c
@@ -153,6 +153,7 @@ int arc_mdio_probe(struct arc_emac_priv *priv)
        if (IS_ERR(data->reset_gpio)) {
                error = PTR_ERR(data->reset_gpio);
                dev_err(priv->dev, "Failed to request gpio: %d\n", error);
+               mdiobus_free(bus);
                return error;
        }
 
-- 
2.17.1