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authorMadalin Bucur <madalin.bucur@nxp.com>2018-01-09 15:43:34 +0300
committerDavid S. Miller <davem@davemloft.net>2018-01-10 23:07:47 +0300
commit95f566de0269a0c59fd6a737a147731302136429 (patch)
tree773724e62075b36b4ece60979479b4a612435259 /drivers/of
parentb0d55b5bc77755501be9de2c935d106ff8dba9ac (diff)
downloadlinux-95f566de0269a0c59fd6a737a147731302136429.tar.xz
of_mdio: avoid MDIO bus removal when a PHY is missing
If one of the child devices is missing the of_mdiobus_register_phy() call will return -ENODEV. When a missing device is encountered the registration of the remaining PHYs is stopped and the MDIO bus will fail to register. Propagate all errors except ENODEV to avoid it. Signed-off-by: Madalin Bucur <madalin.bucur@nxp.com> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/of')
-rw-r--r--drivers/of/of_mdio.c9
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/of/of_mdio.c b/drivers/of/of_mdio.c
index 3481e69738b5..a327be1d264b 100644
--- a/drivers/of/of_mdio.c
+++ b/drivers/of/of_mdio.c
@@ -231,7 +231,12 @@ int of_mdiobus_register(struct mii_bus *mdio, struct device_node *np)
rc = of_mdiobus_register_phy(mdio, child, addr);
else
rc = of_mdiobus_register_device(mdio, child, addr);
- if (rc)
+
+ if (rc == -ENODEV)
+ dev_err(&mdio->dev,
+ "MDIO device at address %d is missing.\n",
+ addr);
+ else if (rc)
goto unregister;
}
@@ -255,7 +260,7 @@ int of_mdiobus_register(struct mii_bus *mdio, struct device_node *np)
if (of_mdiobus_child_is_phy(child)) {
rc = of_mdiobus_register_phy(mdio, child, addr);
- if (rc)
+ if (rc && rc != -ENODEV)
goto unregister;
}
}