On Wed, Oct 29, 2025 at 02:20:14PM +0100, Andrew Lunn wrote:

quoted

+/* Hard-reset a PHY before registration */
+static int fwnode_reset_phy(struct mii_bus *bus, u32 addr,
+			    struct fwnode_handle *phy_node)
+{
+	struct mdio_device *tmpdev;
+	int rc;
+
+	tmpdev = mdio_device_create(bus, addr);
+	if (IS_ERR(tmpdev))
+		return PTR_ERR(tmpdev);
+
+	fwnode_handle_get(phy_node);

You add a _get() here. Where is the corresponding _put()?

When mdio_device_free() is called, it eventually invokes
mdio_device_release(). There is the corresponding _put(), that will
release the reference. I also verified this with a stack trace.

Also, fwnode_handle_get() returns a handle. Why do you throw it away?
What is the point of this get?

I copied this initialization stub from of_mdiobus_register_device()
in of_mdio.c. The same pattern is used there:

	fwnode_handle_get(fwnode);
	device_set_node(&mdiodev->dev, fwnode);

It is kind of awkward that we need to half-establish a device, just
to assert the reset, but I could not think of any better solution, that
does not lead to a large amount of code duplication.

quoted

+	device_set_node(&tmpdev->dev, phy_node);
+	rc = mdio_device_register_reset(tmpdev);
+	if (rc) {
+		mdio_device_free(tmpdev);
+		return rc;
+	}
+
+	mdio_device_reset(tmpdev, 1);
+	mdio_device_reset(tmpdev, 0);
+
+	mdio_device_unregister_reset(tmpdev);
+	mdio_device_free(tmpdev);
+
+	return 0;
+}
+

	Andrew

Csaba