[Resend PATCH v5] mac80211: keep sending peer candidate events while in listen state

["Nishikawa, Kenzoh" <Kenzoh.Nishikawa@jp.sony.com>]

Instead of sending peer candidate events just once, send them 
as long as the peer remains in the LISTEN state in the peering 
state machine, when userspace is implementing the peering manager.
Userspace may silence the events from a peer by progressing 
the state machine or by setting the link state to BLOCKED.

Fixes the problem that a mesh peering process won't be fired 
again after the previous first peering trial fails due to like 
air propagation error if the peering is managed by user space 
such as wpa_supplicant.

This patch works with another patch for wpa_supplicant described 
here which fires a peering process again triggered by the notice 
from kernel.
http://lists.shmoo.com/pipermail/hostap/2014-November/031235.html

Signed-off-by: Kenzoh Nishikawa <Kenzoh.Nishikawa at jp.sony.com>
---
net/mac80211/mesh_plink.c |    7 +++++++
1 file changed, 7 insertions(+)

diff --git a/net/mac80211/mesh_plink.c b/net/mac80211/mesh_plink.c index 32c7bd0..dfc429b 100644
--- a/net/mac80211/mesh_plink.c
+++ b/net/mac80211/mesh_plink.c
@@ -524,6 +524,13 @@ void mesh_neighbour_update(struct ieee80211_sub_if_data *sdata,
 	    sdata->u.mesh.mshcfg.auto_open_plinks &&
 	    rssi_threshold_check(sta, sdata))
 		changed = mesh_plink_open(sta);
+	else if (sta->plink_state == NL80211_PLINK_LISTEN &&
+		 (sdata->u.mesh.user_mpm ||
+		  sdata->u.mesh.security & IEEE80211_MESH_SEC_AUTHED))
+		cfg80211_notify_new_peer_candidate(sdata->dev, hw_addr,
+						   elems->ie_start,
+						   elems->total_len,
+						   GFP_ATOMIC);
 
 	ieee80211_mps_frame_release(sta, elems);
 out: