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authorBob Copeland <me@bobcopeland.com>2013-03-29 09:38:39 -0400
committerJohannes Berg <johannes.berg@intel.com>2013-04-08 09:16:59 +0200
commitae76eef027f75fadd8a8eda55ee07707f077aacb (patch)
tree996060a0166128480ad5e55244438cd16448fb99 /net/mac80211/mesh_hwmp.c
parent0f71651f935d05557eac5862ff68dd2335b0ce0e (diff)
downloadlinux-sh-ae76eef027f75fadd8a8eda55ee07707f077aacb.tar.gz
mac80211: return new mpath from mesh_path_add()
Most times that mesh_path_add() is called, it is followed by a lookup to get the just-added mpath. We can instead just return the new mpath in the case that we allocated one (or the existing one if already there), so do that. Also, reorder the code in mesh_path_add a bit so that we don't need to allocate in the pre-existing case. Signed-off-by: Bob Copeland <bob@cozybit.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/mac80211/mesh_hwmp.c')
-rw-r--r--net/mac80211/mesh_hwmp.c22
1 files changed, 9 insertions, 13 deletions
diff --git a/net/mac80211/mesh_hwmp.c b/net/mac80211/mesh_hwmp.c
index 94904337784c..c82d5e6a24c0 100644
--- a/net/mac80211/mesh_hwmp.c
+++ b/net/mac80211/mesh_hwmp.c
@@ -445,9 +445,8 @@ static u32 hwmp_route_info_get(struct ieee80211_sub_if_data *sdata,
}
}
} else {
- mesh_path_add(sdata, orig_addr);
- mpath = mesh_path_lookup(sdata, orig_addr);
- if (!mpath) {
+ mpath = mesh_path_add(sdata, orig_addr);
+ if (IS_ERR(mpath)) {
rcu_read_unlock();
return 0;
}
@@ -486,9 +485,8 @@ static u32 hwmp_route_info_get(struct ieee80211_sub_if_data *sdata,
(last_hop_metric > mpath->metric)))
fresh_info = false;
} else {
- mesh_path_add(sdata, ta);
- mpath = mesh_path_lookup(sdata, ta);
- if (!mpath) {
+ mpath = mesh_path_add(sdata, ta);
+ if (IS_ERR(mpath)) {
rcu_read_unlock();
return 0;
}
@@ -804,9 +802,8 @@ static void hwmp_rann_frame_process(struct ieee80211_sub_if_data *sdata,
mpath = mesh_path_lookup(sdata, orig_addr);
if (!mpath) {
- mesh_path_add(sdata, orig_addr);
- mpath = mesh_path_lookup(sdata, orig_addr);
- if (!mpath) {
+ mpath = mesh_path_add(sdata, orig_addr);
+ if (IS_ERR(mpath)) {
rcu_read_unlock();
sdata->u.mesh.mshstats.dropped_frames_no_route++;
return;
@@ -1098,11 +1095,10 @@ int mesh_nexthop_resolve(struct ieee80211_sub_if_data *sdata,
/* no nexthop found, start resolving */
mpath = mesh_path_lookup(sdata, target_addr);
if (!mpath) {
- mesh_path_add(sdata, target_addr);
- mpath = mesh_path_lookup(sdata, target_addr);
- if (!mpath) {
+ mpath = mesh_path_add(sdata, target_addr);
+ if (IS_ERR(mpath)) {
mesh_path_discard_frame(sdata, skb);
- err = -ENOSPC;
+ err = PTR_ERR(mpath);
goto endlookup;
}
}