From 8a6631f1cece09047fa44608d21d520ca65ce7d8 Mon Sep 17 00:00:00 2001 From: Oleksij Rempel Date: Wed, 30 Oct 2024 09:52:24 +0100 Subject: [PATCH] net: macb: avoid redundant lookup for "mdio" child node in MDIO setup Pass the "mdio" child node directly to `macb_mdiobus_register` to avoid performing the node lookup twice. Signed-off-by: Oleksij Rempel Reviewed-by: Andrew Lunn Link: https://patch.msgid.link/20241030085224.2632426-1-o.rempel@pengutronix.de Signed-off-by: Jakub Kicinski --- drivers/net/ethernet/cadence/macb_main.c | 23 +++++++++-------------- 1 file changed, 9 insertions(+), 14 deletions(-) diff --git a/drivers/net/ethernet/cadence/macb_main.c b/drivers/net/ethernet/cadence/macb_main.c index ebe886b98891..daa416fb1724 100644 --- a/drivers/net/ethernet/cadence/macb_main.c +++ b/drivers/net/ethernet/cadence/macb_main.c @@ -915,20 +915,15 @@ static int macb_mii_probe(struct net_device *dev) return 0; } -static int macb_mdiobus_register(struct macb *bp) +static int macb_mdiobus_register(struct macb *bp, struct device_node *mdio_np) { struct device_node *child, *np = bp->pdev->dev.of_node; /* If we have a child named mdio, probe it instead of looking for PHYs * directly under the MAC node */ - child = of_get_child_by_name(np, "mdio"); - if (child) { - int ret = of_mdiobus_register(bp->mii_bus, child); - - of_node_put(child); - return ret; - } + if (mdio_np) + return of_mdiobus_register(bp->mii_bus, mdio_np); /* 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 @@ -950,17 +945,15 @@ static int macb_mdiobus_register(struct macb *bp) static int macb_mii_init(struct macb *bp) { - struct device_node *child, *np = bp->pdev->dev.of_node; + struct device_node *mdio_np, *np = bp->pdev->dev.of_node; int err = -ENXIO; /* With fixed-link, we don't need to register the MDIO bus, * except if we have a child named "mdio" in the device tree. * In that case, some devices may be attached to the MACB's MDIO bus. */ - child = of_get_child_by_name(np, "mdio"); - if (child) - of_node_put(child); - else if (of_phy_is_fixed_link(np)) + mdio_np = of_get_child_by_name(np, "mdio"); + if (!mdio_np && of_phy_is_fixed_link(np)) return macb_mii_probe(bp->dev); /* Enable management port */ @@ -984,7 +977,7 @@ static int macb_mii_init(struct macb *bp) dev_set_drvdata(&bp->dev->dev, bp->mii_bus); - err = macb_mdiobus_register(bp); + err = macb_mdiobus_register(bp, mdio_np); if (err) goto err_out_free_mdiobus; @@ -999,6 +992,8 @@ static int macb_mii_init(struct macb *bp) err_out_free_mdiobus: mdiobus_free(bp->mii_bus); err_out: + of_node_put(mdio_np); + return err; }