mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-23 15:32:33 +00:00
97 lines
2.6 KiB
Diff
97 lines
2.6 KiB
Diff
|
From: Felix Fietkau <nbd@nbd.name>
|
||
|
|
Date: Sat, 16 Mar 2019 17:43:58 +0100
|
||
|
|
Subject: [PATCH] mac80211: mesh: drop redundant rcu_read_lock/unlock calls
|
||
|
|
|
||
|
|
The callers of these functions are all within RCU locked sections
|
||
|
|
|
||
|
|
Signed-off-by: Felix Fietkau <nbd@nbd.name>
|
||
|
|
---
|
||
|
|
|
||
|
|
--- a/net/mac80211/mesh_hwmp.c
|
||
|
|
+++ b/net/mac80211/mesh_hwmp.c
|
||
|
|
@@ -1112,16 +1112,13 @@ int mesh_nexthop_resolve(struct ieee8021
|
||
|
|
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);
|
||
|
|
@@ -1129,8 +1126,7 @@ int mesh_nexthop_resolve(struct ieee8021
|
||
|
|
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);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
@@ -1143,13 +1139,10 @@ int mesh_nexthop_resolve(struct ieee8021
|
||
|
|
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;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
@@ -1169,13 +1162,10 @@ int mesh_nexthop_lookup(struct ieee80211
|
||
|
|
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 -
|
||
|
|
@@ -1190,12 +1180,10 @@ int mesh_nexthop_lookup(struct ieee80211
|
||
|
|
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)
|
||
|
|
--- a/net/mac80211/mesh_pathtbl.c
|
||
|
|
+++ b/net/mac80211/mesh_pathtbl.c
|
||
|
|
@@ -217,7 +217,7 @@ static struct mesh_path *mpath_lookup(st
|
||
|
|
{
|
||
|
|
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);
|