wl1271: Prevent performing "join" before association

There is a minor bug in the code causing a "join" to be performed before
there is an intention to associate. Fix this.

Signed-off-by: Juuso Oikarinen <juuso.oikarinen@nokia.com>
Reviewed-by: Luciano Coelho <luciano.coelho@nokia.com>
Signed-off-by: Luciano Coelho <luciano.coelho@nokia.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/wl12xx/wl1271_main.c

@@ -1223,7 +1223,7 @@ static int wl1271_op_config(struct ieee80211_hw *hw, u32 changed)
 		if (conf->flags & IEEE80211_CONF_IDLE &&
 		    test_bit(WL1271_FLAG_JOINED, &wl->flags))
 			wl1271_unjoin_channel(wl);
-		else
+		else if (!(conf->flags & IEEE80211_CONF_IDLE))
 			wl1271_join_channel(wl, channel);
 
 		if (conf->flags & IEEE80211_CONF_IDLE) {