mac80211: Allow scanning on existing channel-type.

Previous code set the channel type to NO_HT, but it
appears that NO_HT packets can be sent on any channel
type, so we do not need to change the channel type
as long as the channel is correct.

Signed-off-by: Ben Greear <greearb@candelatech.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/net/mac80211/main.c b/net/mac80211/main.c
index c155c0b..86562ce 100644
--- a/net/mac80211/main.c
+++ b/net/mac80211/main.c
@@ -112,7 +112,13 @@
 	/* This logic needs to match logic in ieee80211_hw_config */
 	if (local->scan_channel) {
 		chan = local->scan_channel;
-		channel_type = NL80211_CHAN_NO_HT;
+		/* If scanning on oper channel, use whatever channel-type
+		 * is currently in use.
+		 */
+		if (chan == local->oper_channel)
+			channel_type = local->_oper_channel_type;
+		else
+			channel_type = NL80211_CHAN_NO_HT;
 	} else if (local->tmp_channel) {
 		chan = scan_chan = local->tmp_channel;
 		channel_type = local->tmp_channel_type;
@@ -151,7 +157,13 @@
 	offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
 	if (scan_chan) {
 		chan = scan_chan;
-		channel_type = NL80211_CHAN_NO_HT;
+		/* If scanning on oper channel, use whatever channel-type
+		 * is currently in use.
+		 */
+		if (chan == local->oper_channel)
+			channel_type = local->_oper_channel_type;
+		else
+			channel_type = NL80211_CHAN_NO_HT;
 	} else if (local->tmp_channel) {
 		chan = scan_chan = local->tmp_channel;
 		channel_type = local->tmp_channel_type;