mac80211: print reason code for deauth/dissoc frames

The patch prints reason code for deauth/dissoc frames to give users
more ideas what's happened for the disconnection.
Signed-off-by: Zhu Yi <yi.zhu@intel.com>
Acked-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

net/mac80211/mlme.c

@@ -1123,7 +1123,8 @@ static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
 	reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
 
 	if (ifsta->flags & IEEE80211_STA_AUTHENTICATED)
-		printk(KERN_DEBUG "%s: deauthenticated\n", sdata->dev->name);
+		printk(KERN_DEBUG "%s: deauthenticated (Reason: %u)\n",
+				sdata->dev->name, reason_code);
 
 	if (ifsta->state == IEEE80211_STA_MLME_AUTHENTICATE ||
 	    ifsta->state == IEEE80211_STA_MLME_ASSOCIATE ||
@@ -1154,7 +1155,8 @@ static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
 	reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
 
 	if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
-		printk(KERN_DEBUG "%s: disassociated\n", sdata->dev->name);
+		printk(KERN_DEBUG "%s: disassociated (Reason: %u)\n",
+				sdata->dev->name, reason_code);
 
 	if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) {
 		ifsta->state = IEEE80211_STA_MLME_ASSOCIATE;