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Commit ef618b1b authored by Felix Fietkau's avatar Felix Fietkau Committed by Johannes Berg
Browse files

mac80211: mesh: drop redundant rcu_read_lock/unlock calls 



The callers of these functions are all within RCU locked sections

Signed-off-by: default avatarFelix Fietkau <nbd@nbd.name>
Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
parent abaea61c

net/mac80211/mesh_hwmp.c

+7 −19
Original line number Diff line number Diff line
@@ -1130,16 +1130,13 @@ int mesh_nexthop_resolve(struct ieee80211_sub_if_data *sdata, 
	struct mesh_path *mpath;

	struct sk_buff *skb_to_free = NULL;

	u8 *target_addr = hdr->addr3;

	int err = 0;



	/* Nulls are only sent to peers for PS and should be pre-addressed */

	if (ieee80211_is_qos_nullfunc(hdr->frame_control))

		return 0;



	rcu_read_lock();

	err = mesh_nexthop_lookup(sdata, skb);

	if (!err)

		goto endlookup;

	if (!mesh_nexthop_lookup(sdata, skb))

		return 0;



	/* no nexthop found, start resolving */

	mpath = mesh_path_lookup(sdata, target_addr);
@@ -1147,8 +1144,7 @@ int mesh_nexthop_resolve(struct ieee80211_sub_if_data *sdata, 
		mpath = mesh_path_add(sdata, target_addr);

		if (IS_ERR(mpath)) {

			mesh_path_discard_frame(sdata, skb);

			err = PTR_ERR(mpath);

			goto endlookup;

			return PTR_ERR(mpath);

		}

	}
@@ -1161,13 +1157,10 @@ int mesh_nexthop_resolve(struct ieee80211_sub_if_data *sdata, 
	info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING;

	ieee80211_set_qos_hdr(sdata, skb);

	skb_queue_tail(&mpath->frame_queue, skb);

	err = -ENOENT;

	if (skb_to_free)

		mesh_path_discard_frame(sdata, skb_to_free);



endlookup:

	rcu_read_unlock();

	return err;

	return -ENOENT;

}



/**
@@ -1187,13 +1180,10 @@ int mesh_nexthop_lookup(struct ieee80211_sub_if_data *sdata, 
	struct sta_info *next_hop;

	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;

	u8 *target_addr = hdr->addr3;

	int err = -ENOENT;



	rcu_read_lock();

	mpath = mesh_path_lookup(sdata, target_addr);



	if (!mpath || !(mpath->flags & MESH_PATH_ACTIVE))

		goto endlookup;

		return -ENOENT;



	if (time_after(jiffies,

		       mpath->exp_time -
@@ -1208,12 +1198,10 @@ int mesh_nexthop_lookup(struct ieee80211_sub_if_data *sdata, 
		memcpy(hdr->addr1, next_hop->sta.addr, ETH_ALEN);

		memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN);

		ieee80211_mps_set_frame_flags(sdata, next_hop, hdr);

		err = 0;

		return 0;

	}



endlookup:

	rcu_read_unlock();

	return err;

	return -ENOENT;

}



void mesh_path_timer(struct timer_list *t)

net/mac80211/mesh_pathtbl.c

+1 −1
Original line number Diff line number Diff line
@@ -217,7 +217,7 @@ static struct mesh_path *mpath_lookup(struct mesh_table *tbl, const u8 *dst, 
{

	struct mesh_path *mpath;



	mpath = rhashtable_lookup_fast(&tbl->rhead, dst, mesh_rht_params);

	mpath = rhashtable_lookup(&tbl->rhead, dst, mesh_rht_params);



	if (mpath && mpath_expired(mpath)) {

		spin_lock_bh(&mpath->state_lock);