[PATCH 4.19 01/17] net: dsa: bcm_sf2: put device node before return

[Greg Kroah-Hartman]

From: Pan Bian <bianpan2...@163.com>

commit cf3c46631e1637582f517a574c77cd6c05793817 upstream.

Put the device node dn before return error code on failure path.

Fixes: 461cd1b03e32 ("net: dsa: bcm_sf2: Register our slave MDIO bus")
Signed-off-by: Pan Bian <bianpan2...@163.com>
Link: https://lore.kernel.org/r/20210121123343.26330-1-bianpan2...@163.com
Signed-off-by: Jakub Kicinski <k...@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
 drivers/net/dsa/bcm_sf2.c |    8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

--- a/drivers/net/dsa/bcm_sf2.c
+++ b/drivers/net/dsa/bcm_sf2.c
@@ -423,15 +423,19 @@ static int bcm_sf2_mdio_register(struct
        /* Find our integrated MDIO bus node */
        dn = of_find_compatible_node(NULL, NULL, "brcm,unimac-mdio");
        priv->master_mii_bus = of_mdio_find_bus(dn);
-       if (!priv->master_mii_bus)
+       if (!priv->master_mii_bus) {
+               of_node_put(dn);
                return -EPROBE_DEFER;
+       }
 
        get_device(&priv->master_mii_bus->dev);
        priv->master_mii_dn = dn;
 
        priv->slave_mii_bus = devm_mdiobus_alloc(ds->dev);
-       if (!priv->slave_mii_bus)
+       if (!priv->slave_mii_bus) {
+               of_node_put(dn);
                return -ENOMEM;
+       }
 
        priv->slave_mii_bus->priv = priv;
        priv->slave_mii_bus->name = "sf2 slave mii";