mac80211: use fixed channel in ibss join when appropriate

"mac80211: improve IBSS scanning" was missing a hunk.
This adds that hunk as originally intended.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/net/mac80211/ibss.c b/net/mac80211/ibss.c
index ba75236..d5855ae 100644
--- a/net/mac80211/ibss.c
+++ b/net/mac80211/ibss.c
@@ -907,6 +907,12 @@
 	sdata->u.ibss.channel = params->channel;
 	sdata->u.ibss.fixed_channel = params->channel_fixed;
 
+	/* fix ourselves to that channel now already */
+	if (params->channel_fixed) {
+		sdata->local->oper_channel = params->channel;
+		sdata->local->oper_channel_type = NL80211_CHAN_NO_HT;
+	}
+
 	if (params->ie) {
 		sdata->u.ibss.ie = kmemdup(params->ie, params->ie_len,
 					   GFP_KERNEL);