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>

1 files changed, 8 insertions, 1 deletions

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);