mac80211: improve IBSS scanning

When IBSS is fixed to a frequency, it can still
scan to try to find the right BSSID. This makes
sense if the BSSID isn't also fixed, but it need
not scan all channels -- just one is sufficient.
Make it do that by moving the scan setup code to
ieee80211_request_internal_scan() and include
a channel variable setting.

Note that this can be further improved to start
the IBSS right away if both frequency and BSSID
are fixed.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 1 insertions, 16 deletions

diff --git a/net/mac80211/main.c b/net/mac80211/main.c
index ebcca0eaf1dc..353b6b42d9c5 100644
--- a/net/mac80211/main.c
+++ b/net/mac80211/main.c
@@ -439,7 +439,7 @@ int ieee80211_register_hw(struct ieee80211_hw *hw)
         struct ieee80211_local *local = hw_to_local(hw);
         int result;
         enum ieee80211_band band;
-        int channels, i, j, max_bitrates;
+        int channels, max_bitrates;
         bool supp_ht;
         static const u32 cipher_suites[] = {
                 WLAN_CIPHER_SUITE_WEP40,
@@ -605,21 +605,6 @@ int ieee80211_register_hw(struct ieee80211_hw *hw)
 
         ieee80211_led_init(local);
 
-        /* alloc internal scan request */
-        i = 0;
-        local->int_scan_req->ssids = &local->scan_ssid;
-        local->int_scan_req->n_ssids = 1;
-        for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
-                if (!hw->wiphy->bands[band])
-                        continue;
-                for (j = 0; j < hw->wiphy->bands[band]->n_channels; j++) {
-                        local->int_scan_req->channels[i] =
-                                &hw->wiphy->bands[band]->channels[j];
-                        i++;
-                }
-        }
-        local->int_scan_req->n_channels = i;
-
         local->network_latency_notifier.notifier_call =
                 ieee80211_max_network_latency;
         result = pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY,