linux-kernel - Re: [PATCH] net: mdio: fix duplicate registrations for phy with c45 in __of_mdiobus

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Message-ID: <c7ca97c3-720b-494c-9865-b77252954a04@lunn.ch>
Date:   Sun, 11 Jun 2023 17:11:58 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Jianhui Zhao <zhaojh329@...il.com>
Cc:     davem@...emloft.net, edumazet@...gle.com, hkallweit1@...il.com,
        kuba@...nel.org, linux-kernel@...r.kernel.org,
        netdev@...r.kernel.org, pabeni@...hat.com
Subject: Re: [PATCH] net: mdio: fix duplicate registrations for phy with c45
 in __of_mdiobus_register()

On Sun, Jun 11, 2023 at 10:57:28PM +0800, Jianhui Zhao wrote:
> Sorry, I misread the code.

So this is by code inspection, not an actual device tree booting on a
board?

What should happen is that __of_mdiobus_register() has:

	/* Mask out all PHYs from auto probing.  Instead the PHYs listed in
	 * the device tree are populated after the bus has been registered */
	mdio->phy_mask = ~0;

So when

	rc = __mdiobus_register(mdio, owner);

is called, no scanning happens. I _guess_ that is what you missed?

   Andrew

-- 
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