diff mbox series

[net-next,v1] net: macb: avoid redundant lookup for "mdio" child node in MDIO setup

Message ID 20241030085224.2632426-1-o.rempel@pengutronix.de (mailing list archive)
State Accepted
Delegated to: Netdev Maintainers
Headers show
Series [net-next,v1] net: macb: avoid redundant lookup for "mdio" child node in MDIO setup | expand

Checks

Context Check Description
netdev/series_format success Single patches do not need cover letters
netdev/tree_selection success Clearly marked for net-next
netdev/ynl success Generated files up to date; no warnings/errors; no diff in generated;
netdev/fixes_present success Fixes tag not required for -next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 5 this patch: 5
netdev/build_tools success No tools touched, skip
netdev/cc_maintainers success CCed 7 of 7 maintainers
netdev/build_clang success Errors and warnings before: 3 this patch: 3
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 26 this patch: 26
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 59 lines checked
netdev/build_clang_rust success No Rust files in patch. Skipping build
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0
netdev/contest success net-next-2024-11-03--21-00 (tests: 781)

Commit Message

Oleksij Rempel Oct. 30, 2024, 8:52 a.m. UTC 
Pass the "mdio" child node directly to `macb_mdiobus_register` to avoid
performing the node lookup twice.

Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
---
 drivers/net/ethernet/cadence/macb_main.c | 23 +++++++++--------------
 1 file changed, 9 insertions(+), 14 deletions(-)

--
2.39.5

Comments

Andrew Lunn Oct. 30, 2024, 1:36 p.m. UTC | #1 
On Wed, Oct 30, 2024 at 09:52:24AM +0100, Oleksij Rempel wrote:
> Pass the "mdio" child node directly to `macb_mdiobus_register` to avoid
> performing the node lookup twice.
> 
> Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>

Reviewed-by: Andrew Lunn <andrew@lunn.ch>

    Andrew
Jakub Kicinski Nov. 3, 2024, 11:45 p.m. UTC | #2 
On Wed, 30 Oct 2024 09:52:24 +0100 Oleksij Rempel wrote:
> Pass the "mdio" child node directly to `macb_mdiobus_register` to avoid
> performing the node lookup twice.

Applied, thanks.
diff mbox series

Patch

diff --git a/drivers/net/ethernet/cadence/macb_main.c b/drivers/net/ethernet/cadence/macb_main.c
index ebe886b988917..daa416fb1724e 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;
 }