Fri, Jun 11, 2021 at 01:53:54PM +0300, Ioana Ciornei kirjoitti:

From: Calvin Johnson <redacted>

Introduce fwnode_mdiobus_register_phy() to register PHYs on the
mdiobus. From the compatible string, identify whether the PHY is
c45 and based on this create a PHY device instance which is
registered on the mdiobus.

Along with fwnode_mdiobus_register_phy() also introduce
fwnode_find_mii_timestamper() and fwnode_mdiobus_phy_device_register()
since they are needed.
While at it, also use the newly introduced fwnode operation in
of_mdiobus_phy_device_register().

I understand that this patch series is applied, but I think we have a problem
that has to be fixed before the release. See below for the details.

...

+int fwnode_mdiobus_phy_device_register(struct mii_bus *mdio,
+				       struct phy_device *phy,
+				       struct fwnode_handle *child, u32 addr)
+{
+	int rc;
+
+	rc = fwnode_irq_get(child, 0);
+	if (rc == -EPROBE_DEFER)
+		return rc;
+
+	if (rc > 0) {
+		phy->irq = rc;
+		mdio->irq[addr] = rc;
+	} else {
+		phy->irq = mdio->irq[addr];
+	}
+
+	if (fwnode_property_read_bool(child, "broken-turn-around"))
+		mdio->phy_ignore_ta_mask |= 1 << addr;
+
+	fwnode_property_read_u32(child, "reset-assert-us",
+				 &phy->mdio.reset_assert_delay);
+	fwnode_property_read_u32(child, "reset-deassert-us",
+				 &phy->mdio.reset_deassert_delay);
+
+	/* Associate the fwnode with the device structure so it
+	 * can be looked up later
+	 */

+	fwnode_handle_get(child);

We take a reference counting here.
Who and when should drop it?

+	phy->mdio.dev.fwnode = child;
+
+	/* All data is now stored in the phy struct;
+	 * register it
+	 */
+	rc = phy_device_register(phy);
+	if (rc) {
+		fwnode_handle_put(child);
+		return rc;
+	}
+
+	dev_dbg(&mdio->dev, "registered phy %p fwnode at address %i\n",
+		child, addr);
+	return 0;
+}
+EXPORT_SYMBOL(fwnode_mdiobus_phy_device_register);
+
+int fwnode_mdiobus_register_phy(struct mii_bus *bus,
+				struct fwnode_handle *child, u32 addr)
+{
+	struct mii_timestamper *mii_ts = NULL;
+	struct phy_device *phy;
+	bool is_c45 = false;
+	u32 phy_id;
+	int rc;
+
+	mii_ts = fwnode_find_mii_timestamper(child);
+	if (IS_ERR(mii_ts))
+		return PTR_ERR(mii_ts);
+
+	rc = fwnode_property_match_string(child, "compatible",
+					  "ethernet-phy-ieee802.3-c45");
+	if (rc >= 0)
+		is_c45 = true;
+
+	if (is_c45 || fwnode_get_phy_id(child, &phy_id))
+		phy = get_phy_device(bus, addr, is_c45);
+	else
+		phy = phy_device_create(bus, addr, phy_id, 0, NULL);
+	if (IS_ERR(phy)) {
+		unregister_mii_timestamper(mii_ts);
+		return PTR_ERR(phy);
+	}
+
+	if (is_acpi_node(child)) {
+		phy->irq = bus->irq[addr];
+
+		/* Associate the fwnode with the device structure so it
+		 * can be looked up later.
+		 */
+		phy->mdio.dev.fwnode = child;
+
+		/* All data is now stored in the phy struct, so register it */
+		rc = phy_device_register(phy);
+		if (rc) {
+			phy_device_free(phy);

+			fwnode_handle_put(phy->mdio.dev.fwnode);

We dropped reference counting here, but who and when acquired it?

+			return rc;
+		}
+	} else if (is_of_node(child)) {
+		rc = fwnode_mdiobus_phy_device_register(bus, phy, child, addr);
+		if (rc) {
+			unregister_mii_timestamper(mii_ts);
+			phy_device_free(phy);
+			return rc;
+		}
+	}
+
+	/* phy->mii_ts may already be defined by the PHY driver. A
+	 * mii_timestamper probed via the device tree will still have
+	 * precedence.
+	 */
+	if (mii_ts)
+		phy->mii_ts = mii_ts;
+	return 0;
+}

-- 
With Best Regards,
Andy Shevchenko