This is a note to let you know that I've just added the patch titled

of_mdio: avoid MDIO bus removal when a PHY is missing

to the 4.14-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...

The filename of the patch is: of_mdio-avoid-mdio-bus-removal-when-a-phy-is-missing.patch and it can be found in the queue-4.14 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.

From foo@baz Wed Feb 28 16:23:28 CET 2018

From: Madalin Bucur madalin.bucur@nxp.com Date: Tue, 9 Jan 2018 14:43:34 +0200 Subject: of_mdio: avoid MDIO bus removal when a PHY is missing

From: Madalin Bucur madalin.bucur@nxp.com

[ Upstream commit 95f566de0269a0c59fd6a737a147731302136429 ]

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 Signed-off-by: Sasha Levin alexander.levin@verizon.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/of/of_mdio.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-)

--- a/drivers/of/of_mdio.c +++ b/drivers/of/of_mdio.c @@ -228,7 +228,12 @@ int of_mdiobus_register(struct mii_bus * 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; }

@@ -252,7 +257,7 @@ int of_mdiobus_register(struct mii_bus *

if (of_mdiobus_child_is_phy(child)) { rc = of_mdiobus_register_phy(mdio, child, addr); - if (rc) + if (rc && rc != -ENODEV) goto unregister; } }

Patches currently in stable-queue which might be from madalin.bucur@nxp.com are

queue-4.14/of_mdio-avoid-mdio-bus-removal-when-a-phy-is-missing.patch