netdev - Re: [PATCH net-next] net: stmmac: mdio: use phy_find_first to simplify stmmac_mdio

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Message-ID: <4a2d59c0-be25-4b83-b732-138d04f62292@lunn.ch>
Date: Fri, 17 Oct 2025 22:39:04 +0200
From: Andrew Lunn <andrew@...n.ch>
To: Heiner Kallweit <hkallweit1@...il.com>
Cc: Andrew Lunn <andrew+netdev@...n.ch>, Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>, David Miller <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Maxime Coquelin <mcoquelin.stm32@...il.com>,
	Alexandre Torgue <alexandre.torgue@...s.st.com>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	Russell King - ARM Linux <linux@...linux.org.uk>,
	"moderated list:ARM/STM32 ARCHITECTURE" <linux-stm32@...md-mailman.stormreply.com>,
	"linux-arm-kernel@...ts.infradead.org" <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH net-next] net: stmmac: mdio: use phy_find_first to
 simplify stmmac_mdio_register

> -	int addr, found, max_addr;
> +	struct phy_device *phydev;
> +	int addr, max_addr;
>  
>  	if (!mdio_bus_data)
>  		return 0;
> @@ -668,41 +669,31 @@ int stmmac_mdio_register(struct net_device *ndev)
>  	if (priv->plat->phy_node || mdio_node)
>  		goto bus_register_done;
>  
> -	found = 0;
> -	for (addr = 0; addr < max_addr; addr++) {

With this loop gone...

> +	phydev = phy_find_first(new_bus);
> +	if (!phydev || phydev->mdio.addr >= max_addr) {
>  		dev_warn(dev, "No PHY found\n");
>  		err = -ENODEV;
>  		goto no_phy_found;
>  	}
>  
> +	/*
> +	 * If an IRQ was provided to be assigned after
> +	 * the bus probe, do it here.
> +	 */
> +	if (!mdio_bus_data->irqs && mdio_bus_data->probed_phy_irq > 0) {
> +		new_bus->irq[addr] = mdio_bus_data->probed_phy_irq;

... what is setting addr to a value?

	Andrew