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| author | Madalin Bucur <madalin.bucur@nxp.com> | 2018-01-09 14:43:34 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-01-10 15:07:47 -0500 |
| commit | 95f566de0269a0c59fd6a737a147731302136429 (patch) | |
| tree | 773724e62075b36b4ece60979479b4a612435259 | |
| parent | b0d55b5bc77755501be9de2c935d106ff8dba9ac (diff) | |
| download | linux-stable-95f566de0269a0c59fd6a737a147731302136429.tar.gz linux-stable-95f566de0269a0c59fd6a737a147731302136429.tar.bz2 linux-stable-95f566de0269a0c59fd6a737a147731302136429.zip | |
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>
| -rw-r--r-- | drivers/of/of_mdio.c | 9 |
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; } } |