From b91e64aad2c78b0477b9eb3a26335668b4032002 Mon Sep 17 00:00:00 2001
From: Ashok Nagarajan <ashok@cozybit.com>
Date: Mon, 30 Apr 2012 14:20:31 -0700
Subject: mac80211: Allow nonHT/HT peering in mesh

Now that we have protection enabled, allow non-HT and HT20 stations to peer
with HT40+/- stations. Peering is still disallowed for HT40+/- mismatch.

Signed-off-by: Ashok Nagarajan <ashok@cozybit.com>
Reviewed-by: Thomas Pedersen <thomas@cozybit.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---
 net/mac80211/mesh.c | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

(limited to 'net/mac80211/mesh.c')

diff --git a/net/mac80211/mesh.c b/net/mac80211/mesh.c
index 8a952e04690..0fabb8bae9f 100644
--- a/net/mac80211/mesh.c
+++ b/net/mac80211/mesh.c
@@ -76,6 +76,7 @@ bool mesh_matches_local(struct ieee80211_sub_if_data *sdata,
 	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
 	struct ieee80211_local *local = sdata->local;
 	u32 basic_rates = 0;
+	enum nl80211_channel_type sta_channel_type = NL80211_CHAN_NO_HT;
 
 	/*
 	 * As support for each feature is added, check for matching
@@ -102,10 +103,15 @@ bool mesh_matches_local(struct ieee80211_sub_if_data *sdata,
 	if (sdata->vif.bss_conf.basic_rates != basic_rates)
 		goto mismatch;
 
-	/* disallow peering with mismatched channel types for now */
+	if (ie->ht_operation)
+		sta_channel_type =
+			ieee80211_ht_oper_to_channel_type(ie->ht_operation);
+
+	/* Disallow HT40+/- mismatch */
 	if (ie->ht_operation &&
-	    (local->_oper_channel_type !=
-	     ieee80211_ht_oper_to_channel_type(ie->ht_operation)))
+	    local->_oper_channel_type > NL80211_CHAN_HT20 &&
+	    sta_channel_type > NL80211_CHAN_HT20 &&
+	    local->_oper_channel_type != sta_channel_type)
 		goto mismatch;
 
 	return true;
-- 
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