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authorJohannes Berg <johannes@sipsolutions.net>2010-05-03 08:49:48 +0200
committerJohn W. Linville <linville@tuxdriver.com>2010-05-03 14:53:10 -0400
commitbe4a4b6a5d2f76393f545a2545fbaa1b65577e13 (patch)
tree5456729061f295a1e7782766eb195707228475f8 /net/mac80211
parenta75b4363eaafa99d909da4f1192322a78b074c73 (diff)
downloadop-kernel-dev-be4a4b6a5d2f76393f545a2545fbaa1b65577e13.zip
op-kernel-dev-be4a4b6a5d2f76393f545a2545fbaa1b65577e13.tar.gz
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>
Diffstat (limited to 'net/mac80211')
-rw-r--r--net/mac80211/ibss.c9
-rw-r--r--net/mac80211/ieee80211_i.h3
-rw-r--r--net/mac80211/main.c17
-rw-r--r--net/mac80211/scan.c28
4 files changed, 36 insertions, 21 deletions
diff --git a/net/mac80211/ibss.c b/net/mac80211/ibss.c
index c585fce..ba75236 100644
--- a/net/mac80211/ibss.c
+++ b/net/mac80211/ibss.c
@@ -488,7 +488,9 @@ static void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata)
printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
"IBSS networks with same SSID (merge)\n", sdata->name);
- ieee80211_request_internal_scan(sdata, ifibss->ssid, ifibss->ssid_len);
+ ieee80211_request_internal_scan(sdata,
+ ifibss->ssid, ifibss->ssid_len,
+ ifibss->fixed_channel ? ifibss->channel : NULL);
}
static void ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata)
@@ -595,8 +597,9 @@ static void ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata)
printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
"join\n", sdata->name);
- ieee80211_request_internal_scan(sdata, ifibss->ssid,
- ifibss->ssid_len);
+ ieee80211_request_internal_scan(sdata,
+ ifibss->ssid, ifibss->ssid_len,
+ ifibss->fixed_channel ? ifibss->channel : NULL);
} else {
int interval = IEEE80211_SCAN_INTERVAL;
diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
index 4e73660..c8077a3 100644
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -1020,7 +1020,8 @@ void ieee80211_ibss_restart(struct ieee80211_sub_if_data *sdata);
/* scan/BSS handling */
void ieee80211_scan_work(struct work_struct *work);
int ieee80211_request_internal_scan(struct ieee80211_sub_if_data *sdata,
- const u8 *ssid, u8 ssid_len);
+ const u8 *ssid, u8 ssid_len,
+ struct ieee80211_channel *chan);
int ieee80211_request_scan(struct ieee80211_sub_if_data *sdata,
struct cfg80211_scan_request *req);
void ieee80211_scan_cancel(struct ieee80211_local *local);
diff --git a/net/mac80211/main.c b/net/mac80211/main.c
index ebcca0e..353b6b4 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,
diff --git a/net/mac80211/scan.c b/net/mac80211/scan.c
index a9d4058..4146512 100644
--- a/net/mac80211/scan.c
+++ b/net/mac80211/scan.c
@@ -728,10 +728,12 @@ int ieee80211_request_scan(struct ieee80211_sub_if_data *sdata,
}
int ieee80211_request_internal_scan(struct ieee80211_sub_if_data *sdata,
- const u8 *ssid, u8 ssid_len)
+ const u8 *ssid, u8 ssid_len,
+ struct ieee80211_channel *chan)
{
struct ieee80211_local *local = sdata->local;
int ret = -EBUSY;
+ enum nl80211_band band;
mutex_lock(&local->scan_mtx);
@@ -739,6 +741,30 @@ int ieee80211_request_internal_scan(struct ieee80211_sub_if_data *sdata,
if (local->scan_req)
goto unlock;
+ /* fill internal scan request */
+ if (!chan) {
+ int i, nchan = 0;
+
+ for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
+ if (!local->hw.wiphy->bands[band])
+ continue;
+ for (i = 0;
+ i < local->hw.wiphy->bands[band]->n_channels;
+ i++) {
+ local->int_scan_req->channels[nchan] =
+ &local->hw.wiphy->bands[band]->channels[i];
+ nchan++;
+ }
+ }
+
+ local->int_scan_req->n_channels = nchan;
+ } else {
+ local->int_scan_req->channels[0] = chan;
+ local->int_scan_req->n_channels = 1;
+ }
+
+ local->int_scan_req->ssids = &local->scan_ssid;
+ local->int_scan_req->n_ssids = 1;
memcpy(local->int_scan_req->ssids[0].ssid, ssid, IEEE80211_MAX_SSID_LEN);
local->int_scan_req->ssids[0].ssid_len = ssid_len;
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