On Tue, 2016-03-29 at 12:35 +0300, Emmanuel Grumbach wrote:
>
> +void ieee80211_nan_func_match(struct ieee80211_vif *vif,
> + struct cfg80211_nan_match_params
> *match,
> + gfp_t gfp)
> +{
> + struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
> + struct ieee80211_nan_func *func;
> + struct wireless_dev *wdev;
> +
> + if (WARN_ON(vif->type != NL80211_IFTYPE_NAN))
> + return;
> +
> + spin_lock_bh(&sdata->u.nan.func_lock);
> +
> + func = ieee80211_find_nan_func(sdata, match->inst_id);
> + if (WARN_ON(!func)) {
> + spin_unlock_bh(&sdata->u.nan.func_lock);
> + return;
> + }
> + match->cookie = func->func.cookie;
>
Ok maybe this requires a spinlock - due to how drivers want to call it
- but could also use RCU? Particularly with IDR that shouldn't be
difficult.
johannes
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