From: Dan Nicholson <dbn.lists@gmail.com>
Date: Wed, 24 Sep 2008 09:51:08 +0000 (+0300)
Subject: Don't post scan results when initial scan is emtpy
X-Git-Url: http://hostap.epitest.fi/gitweb/gitweb.cgi?p=hostap.git;a=commitdiff_plain;h=23e072374ea500002b8beec5d0e87f9fc6a7609c;hp=2064c2f98515016c376f3b69bfe161c85639e764

Don't post scan results when initial scan is emtpy

When the initial scan is made, just the cached results from the driver
are used. If this is empty, it's useless to post the results since
another scan is being scheduled immediately. This just causes extra
processing from listeners for no gain.
---

diff --git a/wpa_supplicant/events.c b/wpa_supplicant/events.c
index 0f9b338..04e3152 100644
--- a/wpa_supplicant/events.c
+++ b/wpa_supplicant/events.c
@@ -551,9 +551,18 @@ static void wpa_supplicant_event_scan_results(struct wpa_supplicant *wpa_s)
 		goto req_scan;
 	}
 
-	wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_SCAN_RESULTS);
-
-	wpa_supplicant_dbus_notify_scan_results(wpa_s);
+	/*
+	 * Don't post the results if this was the initial cached
+	 * and there were no results.
+	 */
+	if (wpa_s->scan_res_tried == 1 && wpa_s->conf->ap_scan == 1 &&
+	    wpa_s->scan_res->num == 0) {
+		wpa_msg(wpa_s, MSG_DEBUG, "Cached scan results are "
+			"empty - not posting");
+	} else {
+		wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_SCAN_RESULTS);
+		wpa_supplicant_dbus_notify_scan_results(wpa_s);
+	}
 
 	if (wpa_s->conf->ap_scan == 2 || wpa_s->disconnected)
 		return;