net: of_mdio: fix behavior on missing phy device

of_mdiobus_register creates a phy_device even if get_phy_device failed
to create it previously. This causes indefinite polling on non-existent
PHYs. This fix makes of_mdio_register rely on get_phy_device to
properly create the device or fail otherwise.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 4 insertions, 7 deletions

diff --git a/drivers/of/of_mdio.c b/drivers/of/of_mdio.c
index 23049aeca662..d5a57a9e329c 100644
--- a/drivers/of/of_mdio.c
+++ b/drivers/of/of_mdio.c
@@ -84,13 +84,10 @@ int of_mdiobus_register(struct mii_bus *mdio, struct device_node *np)
                 phy = get_phy_device(mdio, addr, is_c45);
 
                 if (!phy || IS_ERR(phy)) {
-                        phy = phy_device_create(mdio, addr, 0, false, NULL);
-                        if (!phy || IS_ERR(phy)) {
-                                dev_err(&mdio->dev,
-                                        "error creating PHY at address %i\n",
-                                        addr);
-                                continue;
-                        }
+                        dev_err(&mdio->dev,
+                                "cannot get PHY at address %i\n",
+                                addr);
+                        continue;
                 }
 
                 /* Associate the OF node with the device structure so it