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net: macb: Fix handling of fixed-link node

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[ Upstream commit 79540d133e ]

fixed-link nodes are treated as PHY nodes by of_mdiobus_child_is_phy().
We must check if the interface is a fixed-link before looking up for PHY
nodes.

Fixes: 7897b071ac ("net: macb: convert to phylink")
Tested-by: Cristian Birsan <cristian.birsan@microchip.com>
Signed-off-by: Codrin Ciubotariu <codrin.ciubotariu@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Codrin Ciubotariu
2020-03-31 12:39:35 +03:00
committed by Greg Kroah-Hartman
parent 6372215ba4
commit 2bc1fe7c83
1 changed files with 3 additions and 0 deletions
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3
drivers/net/ethernet/cadence/macb_main.c
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@@ -685,6 +685,9 @@ static int macb_mdiobus_register(struct macb *bp)
{
struct device_node *child, *np = bp->pdev->dev.of_node;
if (of_phy_is_fixed_link(np))
return mdiobus_register(bp->mii_bus);
/* Only create the PHY from the device tree if at least one PHY is
* described. Otherwise scan the entire MDIO bus. We do this to support
* old device tree that did not follow the best practices and did not