Re: [PATCH net-next v4 4/5] net: mdio: realtek-rtl9300: reject duplicate MDIO bus IDs

On Sat, Sep 12, 2026 at 03:04:50PM +0200, Markus Stockhausen wrote:

The reg property identifies the hardware MDIO bus and is used as an
index into the per-bus state. However, duplicate bus IDs are currently
not rejected explicitly and only fail later during MDIO bus
registration due to the duplicate bus ID.

Keep track of successfully registered buses and reject a duplicate reg
value before allocating another bus. For this use the already existing
but currently unused priv->bus[] property.

Signed-off-by: Markus Stockhausen <redacted>

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

    Andrew