[PATCH 4.4 86/96] mac80211: Suppress NEW_PEER_CANDIDATE event if no room

Greg Kroah-Hartman
2017-11-28T10:32:09Z

From: Masashi Honma <masashi.honma@gmail.com>

[ Upstream commit 11197d006bcfabf0173a7820a163fcaac420d10e ]

Previously, kernel sends NEW_PEER_CANDIDATE event to user land even if
the found peer does not have any room to accept other peer. This causes
continuous connection trials.

Signed-off-by: Masashi Honma <masashi.honma@gmail.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
net/mac80211/mesh_plink.c | 14 ++++++++------
1 file changed, 8 insertions(+), 6 deletions(-)

--- a/net/mac80211/mesh_plink.c
+++ b/net/mac80211/mesh_plink.c
@@ -495,12 +495,14 @@ mesh_sta_info_alloc(struct ieee80211_sub

/* Userspace handles station allocation */
if (sdata->u.mesh.user_mpm ||
- sdata->u.mesh.security & IEEE80211_MESH_SEC_AUTHED)
- cfg80211_notify_new_peer_candidate(sdata->dev, addr,
- elems->ie_start,
- elems->total_len,
- GFP_KERNEL);
- else
+ sdata->u.mesh.security & IEEE80211_MESH_SEC_AUTHED) {
+ if (mesh_peer_accepts_plinks(elems) &&
+ mesh_plink_availables(sdata))
+ cfg80211_notify_new_peer_candidate(sdata->dev, addr,
+ elems->ie_start,
+ elems->total_len,
+ GFP_KERNEL);
+ } else
sta = __mesh_sta_info_alloc(sdata, addr);

return sta;