[PATCH master 1/2] net: dsa: realtek: support enabling only one of the drivers

[Sascha Hauer]

On Wed, Jan 25, 2023 at 08:53:53AM +0100, Ahmad Fatoum wrote:
> We have drivers for both rtl8365mb and rtl8366rb and each uses a
> different tagger. realtek-dsa didn't know that and caused a reference to
> an unavailable symbol when one of them was disabled. Add IS_ENABLED()
> guards to fix this.
> 
> Signed-off-by: Ahmad Fatoum <a.fatoum at pengutronix.de>
> ---
>  drivers/net/realtek-dsa/tagger.c | 16 +++++++++++-----
>  1 file changed, 11 insertions(+), 5 deletions(-)

Applied, thanks

Sascha

> 
> diff --git a/drivers/net/realtek-dsa/tagger.c b/drivers/net/realtek-dsa/tagger.c
> index 1d4461aebcb8..3a41f3b3c1b4 100644
> --- a/drivers/net/realtek-dsa/tagger.c
> +++ b/drivers/net/realtek-dsa/tagger.c
> @@ -4,7 +4,7 @@
>  
>  int realtek_dsa_init_tagger(struct realtek_priv *priv)
>  {
> -	const struct dsa_device_ops *tagger_ops;
> +	const struct dsa_device_ops *tagger_ops = NULL;
>  	struct dsa_switch_ops *ops;
>  
>  	/* TODO: Tagging can be configured per port in Linux. barebox DSA core
> @@ -14,18 +14,24 @@ int realtek_dsa_init_tagger(struct realtek_priv *priv)
>  	 */
>  	switch (priv->ops->get_tag_protocol(priv)) {
>  	case DSA_TAG_PROTO_RTL4_A:
> -		tagger_ops = &rtl4a_netdev_ops;
> +		if (IS_ENABLED(CONFIG_NET_DSA_TAG_RTL4_A))
> +			tagger_ops = &rtl4a_netdev_ops;
>  		break;
>  	case DSA_TAG_PROTO_RTL8_4:
> -		tagger_ops = &rtl8_4_netdev_ops;
> +		if (IS_ENABLED(CONFIG_NET_DSA_TAG_RTL8_4))
> +			tagger_ops = &rtl8_4_netdev_ops;
>  		break;
>  	case DSA_TAG_PROTO_RTL8_4T:
> -		tagger_ops = &rtl8_4t_netdev_ops;
> +		if (IS_ENABLED(CONFIG_NET_DSA_TAG_RTL8_4))
> +			tagger_ops = &rtl8_4t_netdev_ops;
>  		break;
>  	default:
> -		return -EINVAL;
> +		break;
>  	}
>  
> +	if (!tagger_ops)
> +		return -EINVAL;
> +
>  	ops = memdup(priv->ds->ops, sizeof(*priv->ds->ops));
>  	ops->xmit = tagger_ops->xmit;
>  	ops->rcv = tagger_ops->rcv;
> -- 
> 2.30.2
> 
> 
> 

-- 
Pengutronix e.K.                           |                             |
Steuerwalder Str. 21                       | http://www.pengutronix.de/  |
31137 Hildesheim, Germany                  | Phone: +49-5121-206917-0    |
Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-5555 |