From: Ben Greear <greearb@candelatech.com>
Date: Mon, 31 Jan 2011 19:30:09 +0000 (-0800)
Subject: mac80211: Recalculate channel-type on iface removal.
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=2cf22b897c63df65e7360a1897e5312c58617fbd;p=linux-beck.git

mac80211: Recalculate channel-type on iface removal.

When a vif goes away, it could cause the super-chan
to be recalculated differently, so do that calculation
on iface removal.

Signed-off-by: Ben Greear <greearb@candelatech.com>
Acked-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---

diff --git a/net/mac80211/iface.c b/net/mac80211/iface.c
index 8acba456744e..5a4e19b88032 100644
--- a/net/mac80211/iface.c
+++ b/net/mac80211/iface.c
@@ -382,6 +382,7 @@ static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
 	struct sk_buff *skb, *tmp;
 	u32 hw_reconf_flags = 0;
 	int i;
+	enum nl80211_channel_type orig_ct;
 
 	if (local->scan_sdata == sdata)
 		ieee80211_scan_cancel(local);
@@ -542,8 +543,14 @@ static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
 		hw_reconf_flags = 0;
 	}
 
+	/* Re-calculate channel-type, in case there are multiple vifs
+	 * on different channel types.
+	 */
+	orig_ct = local->_oper_channel_type;
+	ieee80211_set_channel_type(local, NULL, NL80211_CHAN_NO_HT);
+
 	/* do after stop to avoid reconfiguring when we stop anyway */
-	if (hw_reconf_flags)
+	if (hw_reconf_flags || (orig_ct != local->_oper_channel_type))
 		ieee80211_hw_config(local, hw_reconf_flags);
 
 	spin_lock_irqsave(&local->queue_stop_reason_lock, flags);