diff --git a/drivers/net/wireless/iwlwifi/iwl-sta.c b/drivers/net/wireless/iwlwifi/iwl-sta.c
index 8afa39b4b488..842f15653238 100644
--- a/drivers/net/wireless/iwlwifi/iwl-sta.c
+++ b/drivers/net/wireless/iwlwifi/iwl-sta.c
@@ -80,19 +80,90 @@ int iwl_get_ra_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr)
 }
 EXPORT_SYMBOL(iwl_get_ra_sta_id);
 
+/* priv->sta_lock must be held */
 static void iwl_sta_ucode_activate(struct iwl_priv *priv, u8 sta_id)
 {
+
+	if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE))
+		IWL_ERR(priv, "ACTIVATE a non DRIVER active station id %u addr %pM\n",
+			sta_id, priv->stations[sta_id].sta.sta.addr);
+
+	if (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE) {
+		IWL_DEBUG_ASSOC(priv,
+				"STA id %u addr %pM already present in uCode (according to driver)\n",
+				sta_id, priv->stations[sta_id].sta.sta.addr);
+	} else {
+		priv->stations[sta_id].used |= IWL_STA_UCODE_ACTIVE;
+		IWL_DEBUG_ASSOC(priv, "Added STA id %u addr %pM to uCode\n",
+				sta_id, priv->stations[sta_id].sta.sta.addr);
+	}
+}
+
+static void iwl_process_add_sta_resp(struct iwl_priv *priv,
+				     struct iwl_addsta_cmd *addsta,
+				     struct iwl_rx_packet *pkt,
+				     bool sync)
+{
+	u8 sta_id = addsta->sta.sta_id;
 	unsigned long flags;
 
+	if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
+		IWL_ERR(priv, "Bad return from REPLY_ADD_STA (0x%08X)\n",
+			pkt->hdr.flags);
+		return;
+	}
+
+	IWL_DEBUG_INFO(priv, "Processing response for adding station %u\n",
+		       sta_id);
+
 	spin_lock_irqsave(&priv->sta_lock, flags);
 
-	if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE))
-		IWL_ERR(priv, "ACTIVATE a non DRIVER active station %d\n",
+	switch (pkt->u.add_sta.status) {
+	case ADD_STA_SUCCESS_MSK:
+		IWL_DEBUG_INFO(priv, "REPLY_ADD_STA PASSED\n");
+		iwl_sta_ucode_activate(priv, sta_id);
+		break;
+	case ADD_STA_NO_ROOM_IN_TABLE:
+		IWL_ERR(priv, "Adding station %d failed, no room in table.\n",
 			sta_id);
+		break;
+	case ADD_STA_NO_BLOCK_ACK_RESOURCE:
+		IWL_ERR(priv, "Adding station %d failed, no block ack resource.\n",
+			sta_id);
+		break;
+	case ADD_STA_MODIFY_NON_EXIST_STA:
+		IWL_ERR(priv, "Attempting to modify non-existing station %d \n",
+			sta_id);
+		break;
+	default:
+		IWL_DEBUG_ASSOC(priv, "Received REPLY_ADD_STA:(0x%08X)\n",
+				pkt->u.add_sta.status);
+		break;
+	}
 
-	priv->stations[sta_id].used |= IWL_STA_UCODE_ACTIVE;
-	IWL_DEBUG_ASSOC(priv, "Added STA to Ucode: %pM\n",
-			priv->stations[sta_id].sta.sta.addr);
+	IWL_DEBUG_INFO(priv, "%s station id %u addr %pM\n",
+		       priv->stations[sta_id].sta.mode ==
+		       STA_CONTROL_MODIFY_MSK ?  "Modified" : "Added",
+		       sta_id, priv->stations[sta_id].sta.sta.addr);
+
+	/*
+	 * XXX: The MAC address in the command buffer is often changed from
+	 * the original sent to the device. That is, the MAC address
+	 * written to the command buffer often is not the same MAC adress
+	 * read from the command buffer when the command returns. This
+	 * issue has not yet been resolved and this debugging is left to
+	 * observe the problem.
+	 */
+	IWL_DEBUG_INFO(priv, "%s station according to cmd buffer %pM\n",
+		       priv->stations[sta_id].sta.mode ==
+		       STA_CONTROL_MODIFY_MSK ? "Modified" : "Added",
+		       addsta->sta.addr);
+
+	/*
+	 * Determine if we wanted to modify or add a station,
+	 * if adding a station succeeded we have some more initialization
+	 * to do when using station notification. TODO
+	 */
 
 	spin_unlock_irqrestore(&priv->sta_lock, flags);
 }
@@ -103,23 +174,9 @@ static void iwl_add_sta_callback(struct iwl_priv *priv,
 {
 	struct iwl_addsta_cmd *addsta =
 		(struct iwl_addsta_cmd *)cmd->cmd.payload;
-	u8 sta_id = addsta->sta.sta_id;
 
-	if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
-		IWL_ERR(priv, "Bad return from REPLY_ADD_STA (0x%08X)\n",
-			  pkt->hdr.flags);
-		return;
-	}
+	iwl_process_add_sta_resp(priv, addsta, pkt, false);
 
-	switch (pkt->u.add_sta.status) {
-	case ADD_STA_SUCCESS_MSK:
-		iwl_sta_ucode_activate(priv, sta_id);
-		 /* fall through */
-	default:
-		IWL_DEBUG_HC(priv, "Received REPLY_ADD_STA:(0x%08X)\n",
-			     pkt->u.add_sta.status);
-		break;
-	}
 }
 
 int iwl_send_add_sta(struct iwl_priv *priv,
@@ -145,24 +202,9 @@ int iwl_send_add_sta(struct iwl_priv *priv,
 	if (ret || (flags & CMD_ASYNC))
 		return ret;
 
-	pkt = (struct iwl_rx_packet *)cmd.reply_page;
-	if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
-		IWL_ERR(priv, "Bad return from REPLY_ADD_STA (0x%08X)\n",
-			  pkt->hdr.flags);
-		ret = -EIO;
-	}
-
 	if (ret == 0) {
-		switch (pkt->u.add_sta.status) {
-		case ADD_STA_SUCCESS_MSK:
-			iwl_sta_ucode_activate(priv, sta->sta.sta_id);
-			IWL_DEBUG_INFO(priv, "REPLY_ADD_STA PASSED\n");
-			break;
-		default:
-			ret = -EIO;
-			IWL_WARN(priv, "REPLY_ADD_STA failed\n");
-			break;
-		}
+		pkt = (struct iwl_rx_packet *)cmd.reply_page;
+		iwl_process_add_sta_resp(priv, sta, pkt, true);
 	}
 	iwl_free_pages(priv, cmd.reply_page);