[PATCH v2] wifi: mt76: mt7996: prevent uninit return in mt7996_mac_sta_add_links

[Markus Elfring]

…
> or link_sta_dereference_protected() fail the code jumps to
> the error_unlink label and returns ret which is uninitialised.
…

* Would you like to avoid typos in such a change description?

* Can any background information become more relevant for the usage of
  source code analysis tools?

* Can the summary phrase be improved also another bit?


…
> +++ b/drivers/net/wireless/mediatek/mt76/mt7996/main.c
> @@ -998,16 +998,22 @@ mt7996_mac_sta_add_links(struct mt7996_dev *dev, struct ieee80211_vif *vif,
>  			continue;
>
>  		link_conf = link_conf_dereference_protected(vif, link_id);
> -		if (!link_conf)
> +		if (!link_conf) {
> +			err = -EINVAL;
>  			goto error_unlink;
> +		}
>
>  		link = mt7996_vif_link(dev, vif, link_id);
> -		if (!link)
> +		if (!link) {
> +			err = -EINVAL;
>  			goto error_unlink;
> +		}
…

Can software development interests evolve in ways which might make the avoidance
of duplicate source code more feasible also for affected error/exception handling?

Regards,
Markus