mac80211: make ieee80211_rx_h_mgmt more readable

That function isn't exactly easy to read especially since it
does something in an if branch that continues after the if
because the else returns. Express it in a more readable way.
Signed-off-by: NJohannes Berg <johannes@sipsolutions.net>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

net/mac80211/rx.c

@@ -1586,20 +1586,20 @@ ieee80211_rx_h_action(struct ieee80211_rx_data *rx)
 static ieee80211_rx_result debug_noinline
 ieee80211_rx_h_mgmt(struct ieee80211_rx_data *rx)
 {
-	struct ieee80211_sub_if_data *sdata;
+	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(rx->dev);
 
 	if (!(rx->flags & IEEE80211_RX_RA_MATCH))
 		return RX_DROP_MONITOR;
 
-	sdata = IEEE80211_DEV_TO_SUB_IF(rx->dev);
-	if ((sdata->vif.type == IEEE80211_IF_TYPE_STA ||
-	     sdata->vif.type == IEEE80211_IF_TYPE_IBSS ||
-	     sdata->vif.type == IEEE80211_IF_TYPE_MESH_POINT) &&
-	    !(sdata->flags & IEEE80211_SDATA_USERSPACE_MLME))
-		ieee80211_sta_rx_mgmt(sdata, rx->skb, rx->status);
-	else
+	if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
+	    sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
+	    sdata->vif.type != IEEE80211_IF_TYPE_MESH_POINT)
+		return RX_DROP_MONITOR;
+
+	if (sdata->flags & IEEE80211_SDATA_USERSPACE_MLME)
 		return RX_DROP_MONITOR;
 
+	ieee80211_sta_rx_mgmt(sdata, rx->skb, rx->status);
 	return RX_QUEUED;
 }