4.5-stable review patch. If anyone has any objections, please let me know.
------------------
From: Sara Sharon <sara.sha...@intel.com>
commit d321cd014e51baab475efbdec468255b9e0ec822 upstream.
When joining IBSS a full scan should be initiated in order to search
for existing cell, unless the fixed_channel parameter was set.
A default channel to create the IBSS on if no cell was found is
provided as well.
However - a scan is initiated only on the default channel provided
regardless of whether ifibss->fixed_channel is set or not, with the
obvious result of the cell not joining existing IBSS cell that is
on another channel.
Fixes: 76bed0f43b27 ("mac80211: IBSS fix scan request")
Signed-off-by: Sara Sharon <sara.sha...@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumb...@intel.com>
Signed-off-by: Johannes Berg <johannes.b...@intel.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
net/mac80211/ibss.c | 22 +++++++++++++++-------
1 file changed, 15 insertions(+), 7 deletions(-)
--- a/net/mac80211/ibss.c
+++ b/net/mac80211/ibss.c
@@ -7,6 +7,7 @@
* Copyright 2007, Michael Wu <flaming...@sourmilk.net>
* Copyright 2009, Johannes Berg <johan...@sipsolutions.net>
* Copyright 2013-2014 Intel Mobile Communications GmbH
+ * Copyright(c) 2016 Intel Deutschland GmbH
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
@@ -1485,14 +1486,21 @@ static void ieee80211_sta_find_ibss(stru
sdata_info(sdata, "Trigger new scan to find an IBSS to join\n");
- num = ieee80211_ibss_setup_scan_channels(local->hw.wiphy,
- &ifibss->chandef,
- channels,
- ARRAY_SIZE(channels));
scan_width = cfg80211_chandef_to_scan_width(&ifibss->chandef);
- ieee80211_request_ibss_scan(sdata, ifibss->ssid,
- ifibss->ssid_len, channels, num,
- scan_width);
+
+ if (ifibss->fixed_channel) {
+ num =
ieee80211_ibss_setup_scan_channels(local->hw.wiphy,
+
&ifibss->chandef,
+ channels,
+
ARRAY_SIZE(channels));
+ ieee80211_request_ibss_scan(sdata, ifibss->ssid,
+ ifibss->ssid_len, channels,
+ num, scan_width);
+ } else {
+ ieee80211_request_ibss_scan(sdata, ifibss->ssid,
+ ifibss->ssid_len, NULL,
+ 0, scan_width);
+ }
} else {
int interval = IEEE80211_SCAN_INTERVAL;
