[PATCH] iwl4965: fix scan problem

This patch fixes the following problems for 4965:
1. Fix direct scan by make sure we set one_direct_scan only when the
   mac80211 ask for direct scan.
2. Fix mac_stop and mac_remove_interface calles, we make sure we cancel any
   scan and disassoc on these call.
Signed-off-by: NMohamed Abbas <mabbas@linux.intel.com>
Signed-off-by: NZhu Yi <yi.zhu@intel.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

drivers/net/wireless/iwlwifi/iwl4965-base.c

@@ -6966,7 +6966,7 @@ static void iwl_bg_request_scan(struct work_struct *data)
 		memcpy(scan->direct_scan[0].ssid,
 		       priv->direct_ssid, priv->direct_ssid_len);
 		direct_mask = 1;
-	} else if (!iwl_is_associated(priv)) {
+	} else if (!iwl_is_associated(priv) && priv->essid_len) {
 		scan->direct_scan[0].id = WLAN_EID_SSID;
 		scan->direct_scan[0].len = priv->essid_len;
 		memcpy(scan->direct_scan[0].ssid, priv->essid, priv->essid_len);
@@ -7119,6 +7119,10 @@ static void iwl_bg_post_associate(struct work_struct *data)
 
 	mutex_lock(&priv->mutex);
 
+	if (!priv->interface_id || !priv->is_open) {
+		mutex_unlock(&priv->mutex);
+		return;
+	}
 	iwl_scan_cancel_timeout(priv, 200);
 
 	conf = ieee80211_get_hw_conf(priv->hw);
@@ -7274,9 +7278,19 @@ static void iwl_mac_stop(struct ieee80211_hw *hw)
 	struct iwl_priv *priv = hw->priv;
 
 	IWL_DEBUG_MAC80211("enter\n");
+
+
+	mutex_lock(&priv->mutex);
+	/* stop mac, cancel any scan request and clear
+	 * RXON_FILTER_ASSOC_MSK BIT
+	 */
 	priv->is_open = 0;
-	/*netif_stop_queue(dev); */
-	flush_workqueue(priv->workqueue);
+	iwl_scan_cancel_timeout(priv, 100);
+	cancel_delayed_work(&priv->post_associate);
+	priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
+	iwl_commit_rxon(priv);
+	mutex_unlock(&priv->mutex);
+
 	IWL_DEBUG_MAC80211("leave\n");
 }
 
@@ -7623,6 +7637,12 @@ static void iwl_mac_remove_interface(struct ieee80211_hw *hw,
 	IWL_DEBUG_MAC80211("enter\n");
 
 	mutex_lock(&priv->mutex);
+
+	iwl_scan_cancel_timeout(priv, 100);
+	cancel_delayed_work(&priv->post_associate);
+	priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
+	iwl_commit_rxon(priv);
+
 	if (priv->interface_id == conf->if_id) {
 		priv->interface_id = 0;
 		memset(priv->bssid, 0, ETH_ALEN);
@@ -7675,7 +7695,8 @@ static int iwl_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t len)
 		priv->direct_ssid_len = (u8)
 		    min((u8) len, (u8) IW_ESSID_MAX_SIZE);
 		memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len);
-	}
+	} else
+		priv->one_direct_scan = 0;
 
 	rc = iwl_scan_initiate(priv);
 
@@ -9168,6 +9189,9 @@ static void iwl_pci_remove(struct pci_dev *pdev)
 		iwl_rate_control_unregister(priv->hw);
 	}
 
+	/*netif_stop_queue(dev); */
+	flush_workqueue(priv->workqueue);
+
 	/* ieee80211_unregister_hw calls iwl_mac_stop, which flushes
 	 * priv->workqueue... so we can't take down the workqueue
 	 * until now... */