Re: [PATCH v3 2/2] net: pcs: rzn1-miic: Verify port number from dtb

[Andrew Lunn <andrew@lunn.ch>]

On Wed, Sep 02, 2026 at 11:37:36AM -0700, Kyle Hendry via B4 Relay wrote:
> From: Kyle Hendry <khendry@reliablecontrols.com>
> 
> Add check to make sure port number is in range before writing
> to dt_val array
> 
> Signed-off-by: Kyle Hendry <khendry@reliablecontrols.com>
> ---
>  drivers/net/pcs/pcs-rzn1-miic.c | 6 ++++++
>  1 file changed, 6 insertions(+)
> 
> diff --git a/drivers/net/pcs/pcs-rzn1-miic.c b/drivers/net/pcs/pcs-rzn1-miic.c
> index c50b65d064fa..3ee40eb9d545 100644
> --- a/drivers/net/pcs/pcs-rzn1-miic.c
> +++ b/drivers/net/pcs/pcs-rzn1-miic.c
> @@ -692,6 +692,12 @@ static int miic_parse_dt(struct miic *miic, u32 *mode_cfg)
>  		if (of_property_read_u32(conv, "reg", &port))
>  			continue;
>  
> +		if (port < miic->of_data->miic_port_start || port > miic->of_data->miic_port_max) {
> +			dev_err(miic->dev, "Port number out of range: %d\n", port);
> +			kfree(dt_val);
> +			return -EINVAL;
> +		}
> +

While reviewing this, i noticed:

		/* Adjust for 0 based index */
		dt_val[port + !miic->of_data->miic_port_start] = conf;

Is the ! correct?

	Andrew