mac80211: clean up ieee80211_set_channel

There's no need for ieee80211_set_channel to check
whether a change in configuration happened since
ieee80211_hw_config() auto-detects it.

Additionally, it's wrong to pretend the HT config
for the BSS changed, it didn't, the BSS can't be
up & running (AP beaconing etc.) when the channel
type is changed anyway.

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

diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index f099cf4..bb04f4a 100644 (file)
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -1684,9 +1684,6 @@ static int ieee80211_set_channel(struct wiphy *wiphy,
 {
        struct ieee80211_local *local = wiphy_priv(wiphy);
        struct ieee80211_sub_if_data *sdata = NULL;
-       struct ieee80211_channel *old_oper;
-       enum nl80211_channel_type old_oper_type;
-       enum nl80211_channel_type old_vif_oper_type= NL80211_CHAN_NO_HT;
 
        if (netdev)
                sdata = IEEE80211_DEV_TO_SUB_IF(netdev);
@@ -1704,24 +1701,13 @@ static int ieee80211_set_channel(struct wiphy *wiphy,
                break;
        }
 
-       if (sdata)
-               old_vif_oper_type = sdata->vif.bss_conf.channel_type;
-       old_oper_type = local->_oper_channel_type;
-
        if (!ieee80211_set_channel_type(local, sdata, channel_type))
                return -EBUSY;
 
-       old_oper = local->oper_channel;
        local->oper_channel = chan;
 
-       /* Update driver if changes were actually made. */
-       if ((old_oper != local->oper_channel) ||
-           (old_oper_type != local->_oper_channel_type))
-               ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
-
-       if (sdata && sdata->vif.type != NL80211_IFTYPE_MONITOR &&
-           old_vif_oper_type != sdata->vif.bss_conf.channel_type)
-               ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_HT);
+       /* auto-detects changes */
+       ieee80211_hw_config(local, 0);
 
        return 0;
 }