cfg80211: handle SIOCGIWMODE/SIOCSIWMODE

further reducing wext code in mac80211.

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

1 files changed, 4 insertions, 0 deletions

diff --git a/net/mac80211/iface.c b/net/mac80211/iface.c
index 9ab772ac74ae..5abbc3f07dd6 100644
--- a/net/mac80211/iface.c
+++ b/net/mac80211/iface.c
@@ -698,6 +698,10 @@ int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
         if (type == sdata->vif.type)
                 return 0;
 
+        /* Setting ad-hoc mode on non-IBSS channel is not supported. */
+        if (sdata->local->oper_channel->flags & IEEE80211_CHAN_NO_IBSS)
+                return -EOPNOTSUPP;
+
         /*
          * We could, here, on changes between IBSS/STA/MESH modes,
          * invoke an MLME function instead that disassociates etc.