iwlwifi: fix bug to show hidden APs during scan

Indirect scanning ('iwlist scan') should report information about
hidden APs. When an AP is hidden it does not respond to active scanning,
we thus have to use passive scanning to locate these APs.

This fixes http://bughost.org/bugzilla/show_bug.cgi?id=1499

Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Tested-by: Bill Moss <bmoss@clemson.edu>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/iwlwifi/iwl3945-base.c

@@ -6309,18 +6309,23 @@ static void iwl3945_bg_request_scan(struct work_struct *data)
 	if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR)
 		scan->filter_flags = RXON_FILTER_PROMISC_MSK;
 
-	if (direct_mask)
+	if (direct_mask) {
 		IWL_DEBUG_SCAN
 		    ("Initiating direct scan for %s.\n",
 		     iwl3945_escape_essid(priv->essid, priv->essid_len));
-	else
+		scan->channel_count =
+			iwl3945_get_channels_for_scan(
+				priv, band, 1, /* active */
+				direct_mask,
+				(void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
+	} else {
 		IWL_DEBUG_SCAN("Initiating indirect scan.\n");
-
-	scan->channel_count =
-		iwl3945_get_channels_for_scan(
-			priv, band, 1, /* active */
-			direct_mask,
-			(void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
+		scan->channel_count =
+			iwl3945_get_channels_for_scan(
+				priv, band, 0, /* passive */
+				direct_mask,
+				(void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
+	}
 
 	cmd.len += le16_to_cpu(scan->tx_cmd.len) +
 	    scan->channel_count * sizeof(struct iwl3945_scan_channel);

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

@@ -6744,18 +6744,23 @@ static void iwl4965_bg_request_scan(struct work_struct *data)
 	if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR)
 		scan->filter_flags = RXON_FILTER_PROMISC_MSK;
 
-	if (direct_mask)
+	if (direct_mask) {
 		IWL_DEBUG_SCAN
 		    ("Initiating direct scan for %s.\n",
 		     iwl4965_escape_essid(priv->essid, priv->essid_len));
-	else
+		scan->channel_count =
+			iwl4965_get_channels_for_scan(
+				priv, band, 1, /* active */
+				direct_mask,
+				(void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
+	} else {
 		IWL_DEBUG_SCAN("Initiating indirect scan.\n");
-
-	scan->channel_count =
-		iwl4965_get_channels_for_scan(
-			priv, band, 1, /* active */
-			direct_mask,
-			(void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
+		scan->channel_count =
+			iwl4965_get_channels_for_scan(
+				priv, band, 0, /* passive */
+				direct_mask,
+				(void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
+	}
 
 	cmd.len += le16_to_cpu(scan->tx_cmd.len) +
 	    scan->channel_count * sizeof(struct iwl4965_scan_channel);