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[PATCH] mac80211: don't return beacons when mesh is disabled

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From: Johannes Berg <johannes.berg@xxxxxxxxx>

When mesh is disabled, mac80211 was returning
beacons with an empty mesh ID. That isn't
desirable, even if drivers shouldn't be trying
to get beacons to start with.

Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx>
---
 net/mac80211/tx.c |    5 +++++
 1 file changed, 5 insertions(+)

--- wireless-testing.orig/net/mac80211/tx.c	2011-01-13 12:07:19.000000000 +0100
+++ wireless-testing/net/mac80211/tx.c	2011-01-13 12:07:26.000000000 +0100
@@ -2299,6 +2299,11 @@ struct sk_buff *ieee80211_beacon_get_tim
 		struct ieee80211_mgmt *mgmt;
 		u8 *pos;
 
+#ifdef CONFIG_MAC80211_MESH
+		if (!sdata->u.mesh.mesh_id_len)
+			goto out;
+#endif
+
 		/* headroom, head length, tail length and maximum TIM length */
 		skb = dev_alloc_skb(local->tx_headroom + 400 +
 				sdata->u.mesh.vendor_ie_len);


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