* published by the Free Software Foundation.
*/
-#include <linux/wireless.h>
#include <linux/if_arp.h>
#include <linux/rtnetlink.h>
+#include <linux/pm_qos_params.h>
+#include <net/sch_generic.h>
+#include <linux/slab.h>
#include <net/mac80211.h>
#include "ieee80211_i.h"
cfg80211_put_bss(container_of((void *)bss, struct cfg80211_bss, priv));
}
+static bool is_uapsd_supported(struct ieee802_11_elems *elems)
+{
+ u8 qos_info;
+
+ if (elems->wmm_info && elems->wmm_info_len == 7
+ && elems->wmm_info[5] == 1)
+ qos_info = elems->wmm_info[6];
+ else if (elems->wmm_param && elems->wmm_param_len == 24
+ && elems->wmm_param[5] == 1)
+ qos_info = elems->wmm_param[6];
+ else
+ /* no valid wmm information or parameter element found */
+ return false;
+
+ return qos_info & IEEE80211_WMM_IE_AP_QOSINFO_UAPSD;
+}
+
struct ieee80211_bss *
ieee80211_bss_info_update(struct ieee80211_local *local,
struct ieee80211_rx_status *rx_status,
{
struct cfg80211_bss *cbss;
struct ieee80211_bss *bss;
- int clen;
+ int clen, srlen;
s32 signal = 0;
if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
bss->dtim_period = tim_ie->dtim_period;
}
- /* set default value for buggy AP/no TIM element */
- if (bss->dtim_period == 0)
+ /* If the beacon had no TIM IE, or it was invalid, use 1 */
+ if (beacon && !bss->dtim_period)
bss->dtim_period = 1;
- bss->supp_rates_len = 0;
+ /* replace old supported rates if we get new values */
+ srlen = 0;
if (elems->supp_rates) {
- clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
+ clen = IEEE80211_MAX_SUPP_RATES;
if (clen > elems->supp_rates_len)
clen = elems->supp_rates_len;
- memcpy(&bss->supp_rates[bss->supp_rates_len], elems->supp_rates,
- clen);
- bss->supp_rates_len += clen;
+ memcpy(bss->supp_rates, elems->supp_rates, clen);
+ srlen += clen;
}
if (elems->ext_supp_rates) {
- clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
+ clen = IEEE80211_MAX_SUPP_RATES - srlen;
if (clen > elems->ext_supp_rates_len)
clen = elems->ext_supp_rates_len;
- memcpy(&bss->supp_rates[bss->supp_rates_len],
- elems->ext_supp_rates, clen);
- bss->supp_rates_len += clen;
+ memcpy(bss->supp_rates + srlen, elems->ext_supp_rates, clen);
+ srlen += clen;
}
+ if (srlen)
+ bss->supp_rates_len = srlen;
bss->wmm_used = elems->wmm_param || elems->wmm_info;
+ bss->uapsd_supported = is_uapsd_supported(elems);
if (!beacon)
bss->last_probe_resp = jiffies;
return RX_CONTINUE;
if (skb->len < 24)
- return RX_DROP_MONITOR;
+ return RX_CONTINUE;
presp = ieee80211_is_probe_resp(fc);
if (presp) {
ieee802_11_parse_elems(elements, skb->len - baselen, &elems);
if (elems.ds_params && elems.ds_params_len == 1)
- freq = ieee80211_channel_to_frequency(elems.ds_params[0]);
+ freq = ieee80211_channel_to_frequency(elems.ds_params[0],
+ rx_status->band);
else
freq = rx_status->freq;
if (bss)
ieee80211_rx_bss_put(sdata->local, bss);
+ /* If we are on-operating-channel, and this packet is for the
+ * current channel, pass the pkt on up the stack so that
+ * the rest of the stack can make use of it.
+ */
+ if (ieee80211_cfg_on_oper_channel(sdata->local)
+ && (channel == sdata->local->oper_channel))
+ return RX_CONTINUE;
+
dev_kfree_skb(skb);
return RX_QUEUED;
}
local->hw_scan_req->n_channels = n_chans;
ielen = ieee80211_build_preq_ies(local, (u8 *)local->hw_scan_req->ie,
- req->ie, req->ie_len, band);
+ req->ie, req->ie_len, band,
+ req->rates[band], 0);
local->hw_scan_req->ie_len = ielen;
return true;
}
-void ieee80211_scan_completed(struct ieee80211_hw *hw, bool aborted)
+static void __ieee80211_scan_completed(struct ieee80211_hw *hw, bool aborted,
+ bool was_hw_scan)
{
struct ieee80211_local *local = hw_to_local(hw);
- bool was_hw_scan;
+ bool on_oper_chan;
+ bool enable_beacons = false;
- mutex_lock(&local->scan_mtx);
+ lockdep_assert_held(&local->mtx);
/*
* It's ok to abort a not-yet-running scan (that
if (WARN_ON(!local->scanning && !aborted))
aborted = true;
- if (WARN_ON(!local->scan_req)) {
- mutex_unlock(&local->scan_mtx);
+ if (WARN_ON(!local->scan_req))
return;
- }
- was_hw_scan = test_bit(SCAN_HW_SCANNING, &local->scanning);
if (was_hw_scan && !aborted && ieee80211_prep_hw_scan(local)) {
- ieee80211_queue_delayed_work(&local->hw,
- &local->scan_work, 0);
- mutex_unlock(&local->scan_mtx);
- return;
+ int rc = drv_hw_scan(local, local->scan_sdata, local->hw_scan_req);
+ if (rc == 0)
+ return;
}
kfree(local->hw_scan_req);
local->scanning = 0;
local->scan_channel = NULL;
- /* we only have to protect scan_req and hw/sw scan */
- mutex_unlock(&local->scan_mtx);
-
- ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
- if (was_hw_scan)
- goto done;
-
- ieee80211_configure_filter(local);
-
- drv_sw_scan_complete(local);
+ on_oper_chan = ieee80211_cfg_on_oper_channel(local);
- ieee80211_offchannel_return(local, true);
+ if (was_hw_scan || !on_oper_chan)
+ ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
+ else
+ /* Set power back to normal operating levels. */
+ ieee80211_hw_config(local, 0);
+
+ if (!was_hw_scan) {
+ bool on_oper_chan2;
+ ieee80211_configure_filter(local);
+ drv_sw_scan_complete(local);
+ on_oper_chan2 = ieee80211_cfg_on_oper_channel(local);
+ /* We should always be on-channel at this point. */
+ WARN_ON(!on_oper_chan2);
+ if (on_oper_chan2 && (on_oper_chan != on_oper_chan2))
+ enable_beacons = true;
+
+ ieee80211_offchannel_return(local, enable_beacons, true);
+ }
- done:
ieee80211_recalc_idle(local);
+
ieee80211_mlme_notify_scan_completed(local);
ieee80211_ibss_notify_scan_completed(local);
ieee80211_mesh_notify_scan_completed(local);
+ ieee80211_queue_work(&local->hw, &local->work_work);
+}
+
+void ieee80211_scan_completed(struct ieee80211_hw *hw, bool aborted)
+{
+ struct ieee80211_local *local = hw_to_local(hw);
+
+ trace_api_scan_completed(local, aborted);
+
+ set_bit(SCAN_COMPLETED, &local->scanning);
+ if (aborted)
+ set_bit(SCAN_ABORTED, &local->scanning);
+ ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
}
EXPORT_SYMBOL(ieee80211_scan_completed);
*/
drv_sw_scan_start(local);
- ieee80211_offchannel_stop_beaconing(local);
-
+ local->leave_oper_channel_time = 0;
local->next_scan_state = SCAN_DECISION;
local->scan_channel_idx = 0;
- drv_flush(local, false);
+ /* We always want to use off-channel PS, even if we
+ * are not really leaving oper-channel. Don't
+ * tell the AP though, as long as we are on-channel.
+ */
+ ieee80211_offchannel_enable_all_ps(local, false);
ieee80211_configure_filter(local);
+ /* We need to set power level at maximum rate for scanning. */
+ ieee80211_hw_config(local, 0);
+
ieee80211_queue_delayed_work(&local->hw,
&local->scan_work,
IEEE80211_CHANNEL_TIME);
struct ieee80211_local *local = sdata->local;
int rc;
+ lockdep_assert_held(&local->mtx);
+
if (local->scan_req)
return -EBUSY;
+ if (!list_empty(&local->work_list)) {
+ /* wait for the work to finish/time out */
+ local->scan_req = req;
+ local->scan_sdata = sdata;
+ return 0;
+ }
+
if (local->ops->hw_scan) {
u8 *ies;
local->hw_scan_req->ie = ies;
local->hw_scan_band = 0;
+
+ /*
+ * After allocating local->hw_scan_req, we must
+ * go through until ieee80211_prep_hw_scan(), so
+ * anything that might be changed here and leave
+ * this function early must not go after this
+ * allocation.
+ */
}
local->scan_req = req;
local->scan_sdata = sdata;
- if (!list_empty(&local->work_list)) {
- /* wait for the work to finish/time out */
- return 0;
- }
-
if (local->ops->hw_scan)
__set_bit(SCAN_HW_SCANNING, &local->scanning);
else
__set_bit(SCAN_SW_SCANNING, &local->scanning);
- /*
- * Kicking off the scan need not be protected,
- * only the scan variable stuff, since now
- * local->scan_req is assigned and other callers
- * will abort their scan attempts.
- *
- * This avoids getting a scan_mtx -> iflist_mtx
- * dependency, so that the scan completed calls
- * have more locking freedom.
- */
ieee80211_recalc_idle(local);
- mutex_unlock(&local->scan_mtx);
if (local->ops->hw_scan) {
WARN_ON(!ieee80211_prep_hw_scan(local));
- rc = drv_hw_scan(local, local->hw_scan_req);
+ rc = drv_hw_scan(local, sdata, local->hw_scan_req);
} else
rc = ieee80211_start_sw_scan(local);
- mutex_lock(&local->scan_mtx);
-
if (rc) {
kfree(local->hw_scan_req);
local->hw_scan_req = NULL;
return rc;
}
-static int ieee80211_scan_state_decision(struct ieee80211_local *local,
- unsigned long *next_delay)
+static unsigned long
+ieee80211_scan_get_channel_time(struct ieee80211_channel *chan)
+{
+ /*
+ * TODO: channel switching also consumes quite some time,
+ * add that delay as well to get a better estimation
+ */
+ if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)
+ return IEEE80211_PASSIVE_CHANNEL_TIME;
+ return IEEE80211_PROBE_DELAY + IEEE80211_CHANNEL_TIME;
+}
+
+static void ieee80211_scan_state_decision(struct ieee80211_local *local,
+ unsigned long *next_delay)
{
bool associated = false;
+ bool tx_empty = true;
+ bool bad_latency;
+ bool listen_int_exceeded;
+ unsigned long min_beacon_int = 0;
struct ieee80211_sub_if_data *sdata;
+ struct ieee80211_channel *next_chan;
- /* if no more bands/channels left, complete scan and advance to the idle state */
- if (local->scan_channel_idx >= local->scan_req->n_channels) {
- ieee80211_scan_completed(&local->hw, false);
- return 1;
- }
-
- /* check if at least one STA interface is associated */
+ /*
+ * check if at least one STA interface is associated,
+ * check if at least one STA interface has pending tx frames
+ * and grab the lowest used beacon interval
+ */
mutex_lock(&local->iflist_mtx);
list_for_each_entry(sdata, &local->interfaces, list) {
if (!ieee80211_sdata_running(sdata))
if (sdata->vif.type == NL80211_IFTYPE_STATION) {
if (sdata->u.mgd.associated) {
associated = true;
- break;
+
+ if (sdata->vif.bss_conf.beacon_int <
+ min_beacon_int || min_beacon_int == 0)
+ min_beacon_int =
+ sdata->vif.bss_conf.beacon_int;
+
+ if (!qdisc_all_tx_empty(sdata->dev)) {
+ tx_empty = false;
+ break;
+ }
}
}
}
mutex_unlock(&local->iflist_mtx);
- if (local->scan_channel) {
+ next_chan = local->scan_req->channels[local->scan_channel_idx];
+
+ if (ieee80211_cfg_on_oper_channel(local)) {
+ /* We're currently on operating channel. */
+ if (next_chan == local->oper_channel)
+ /* We don't need to move off of operating channel. */
+ local->next_scan_state = SCAN_SET_CHANNEL;
+ else
+ /*
+ * We do need to leave operating channel, as next
+ * scan is somewhere else.
+ */
+ local->next_scan_state = SCAN_LEAVE_OPER_CHANNEL;
+ } else {
/*
* we're currently scanning a different channel, let's
- * switch back to the operating channel now if at least
- * one interface is associated. Otherwise just scan the
- * next channel
+ * see if we can scan another channel without interfering
+ * with the current traffic situation.
+ *
+ * Since we don't know if the AP has pending frames for us
+ * we can only check for our tx queues and use the current
+ * pm_qos requirements for rx. Hence, if no tx traffic occurs
+ * at all we will scan as many channels in a row as the pm_qos
+ * latency allows us to. Additionally we also check for the
+ * currently negotiated listen interval to prevent losing
+ * frames unnecessarily.
+ *
+ * Otherwise switch back to the operating channel.
*/
- if (associated)
+
+ bad_latency = time_after(jiffies +
+ ieee80211_scan_get_channel_time(next_chan),
+ local->leave_oper_channel_time +
+ usecs_to_jiffies(pm_qos_request(PM_QOS_NETWORK_LATENCY)));
+
+ listen_int_exceeded = time_after(jiffies +
+ ieee80211_scan_get_channel_time(next_chan),
+ local->leave_oper_channel_time +
+ usecs_to_jiffies(min_beacon_int * 1024) *
+ local->hw.conf.listen_interval);
+
+ if (associated && ( !tx_empty || bad_latency ||
+ listen_int_exceeded))
local->next_scan_state = SCAN_ENTER_OPER_CHANNEL;
else
local->next_scan_state = SCAN_SET_CHANNEL;
- } else {
- /*
- * we're on the operating channel currently, let's
- * leave that channel now to scan another one
- */
- local->next_scan_state = SCAN_LEAVE_OPER_CHANNEL;
}
*next_delay = 0;
- return 0;
}
static void ieee80211_scan_state_leave_oper_channel(struct ieee80211_local *local,
unsigned long *next_delay)
{
- ieee80211_offchannel_stop_station(local);
-
- __set_bit(SCAN_OFF_CHANNEL, &local->scanning);
+ /* PS will already be in off-channel mode,
+ * we do that once at the beginning of scanning.
+ */
+ ieee80211_offchannel_stop_vifs(local, false);
/*
* What if the nullfunc frames didn't arrive?
else
*next_delay = HZ / 10;
+ /* remember when we left the operating channel */
+ local->leave_oper_channel_time = jiffies;
+
/* advance to the next channel to be scanned */
local->next_scan_state = SCAN_SET_CHANNEL;
}
{
/* switch back to the operating channel */
local->scan_channel = NULL;
- ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
+ if (!ieee80211_cfg_on_oper_channel(local))
+ ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
/*
- * Only re-enable station mode interface now; beaconing will be
- * re-enabled once the full scan has been completed.
+ * Re-enable vifs and beaconing. Leave PS
+ * in off-channel state..will put that back
+ * on-channel at the end of scanning.
*/
- ieee80211_offchannel_return(local, false);
-
- __clear_bit(SCAN_OFF_CHANNEL, &local->scanning);
+ ieee80211_offchannel_return(local, true, false);
*next_delay = HZ / 5;
local->next_scan_state = SCAN_DECISION;
chan = local->scan_req->channels[local->scan_channel_idx];
local->scan_channel = chan;
- if (ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL))
- skip = 1;
+
+ /* Only call hw-config if we really need to change channels. */
+ if (chan != local->hw.conf.channel)
+ if (ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL))
+ skip = 1;
/* advance state machine to next channel/band */
local->scan_channel_idx++;
{
int i;
struct ieee80211_sub_if_data *sdata = local->scan_sdata;
+ enum ieee80211_band band = local->hw.conf.channel->band;
for (i = 0; i < local->scan_req->n_ssids; i++)
ieee80211_send_probe_req(
sdata, NULL,
local->scan_req->ssids[i].ssid,
local->scan_req->ssids[i].ssid_len,
- local->scan_req->ie, local->scan_req->ie_len);
+ local->scan_req->ie, local->scan_req->ie_len,
+ local->scan_req->rates[band], false);
/*
* After sending probe requests, wait for probe responses
{
struct ieee80211_local *local =
container_of(work, struct ieee80211_local, scan_work.work);
- struct ieee80211_sub_if_data *sdata = local->scan_sdata;
+ struct ieee80211_sub_if_data *sdata;
unsigned long next_delay = 0;
+ bool aborted, hw_scan;
- mutex_lock(&local->scan_mtx);
- if (!sdata || !local->scan_req) {
- mutex_unlock(&local->scan_mtx);
- return;
- }
+ mutex_lock(&local->mtx);
- if (local->hw_scan_req) {
- int rc = drv_hw_scan(local, local->hw_scan_req);
- mutex_unlock(&local->scan_mtx);
- if (rc)
- ieee80211_scan_completed(&local->hw, true);
- return;
+ sdata = local->scan_sdata;
+
+ if (test_and_clear_bit(SCAN_COMPLETED, &local->scanning)) {
+ aborted = test_and_clear_bit(SCAN_ABORTED, &local->scanning);
+ goto out_complete;
}
+ if (!sdata || !local->scan_req)
+ goto out;
+
if (local->scan_req && !local->scanning) {
struct cfg80211_scan_request *req = local->scan_req;
int rc;
local->scan_sdata = NULL;
rc = __ieee80211_start_scan(sdata, req);
- mutex_unlock(&local->scan_mtx);
-
- if (rc)
- ieee80211_scan_completed(&local->hw, true);
- return;
+ if (rc) {
+ /* need to complete scan in cfg80211 */
+ local->scan_req = req;
+ aborted = true;
+ goto out_complete;
+ } else
+ goto out;
}
- mutex_unlock(&local->scan_mtx);
-
/*
* Avoid re-scheduling when the sdata is going away.
*/
if (!ieee80211_sdata_running(sdata)) {
- ieee80211_scan_completed(&local->hw, true);
- return;
+ aborted = true;
+ goto out_complete;
}
/*
* without scheduling a new work
*/
do {
+ if (!ieee80211_sdata_running(sdata)) {
+ aborted = true;
+ goto out_complete;
+ }
+
switch (local->next_scan_state) {
case SCAN_DECISION:
- if (ieee80211_scan_state_decision(local, &next_delay))
- return;
+ /* if no more bands/channels left, complete scan */
+ if (local->scan_channel_idx >= local->scan_req->n_channels) {
+ aborted = false;
+ goto out_complete;
+ }
+ ieee80211_scan_state_decision(local, &next_delay);
break;
case SCAN_SET_CHANNEL:
ieee80211_scan_state_set_channel(local, &next_delay);
} while (next_delay == 0);
ieee80211_queue_delayed_work(&local->hw, &local->scan_work, next_delay);
+ goto out;
+
+out_complete:
+ hw_scan = test_bit(SCAN_HW_SCANNING, &local->scanning);
+ __ieee80211_scan_completed(&local->hw, aborted, hw_scan);
+out:
+ mutex_unlock(&local->mtx);
}
int ieee80211_request_scan(struct ieee80211_sub_if_data *sdata,
{
int res;
- mutex_lock(&sdata->local->scan_mtx);
+ mutex_lock(&sdata->local->mtx);
res = __ieee80211_start_scan(sdata, req);
- mutex_unlock(&sdata->local->scan_mtx);
+ mutex_unlock(&sdata->local->mtx);
return res;
}
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 ieee80211_band band;
- mutex_lock(&local->scan_mtx);
+ mutex_lock(&local->mtx);
/* busy scanning */
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;
ret = __ieee80211_start_scan(sdata, sdata->local->int_scan_req);
unlock:
- mutex_unlock(&local->scan_mtx);
+ mutex_unlock(&local->mtx);
return ret;
}
+/*
+ * Only call this function when a scan can't be queued -- under RTNL.
+ */
void ieee80211_scan_cancel(struct ieee80211_local *local)
{
- bool abortscan;
+ /*
+ * We are canceling software scan, or deferred scan that was not
+ * yet really started (see __ieee80211_start_scan ).
+ *
+ * Regarding hardware scan:
+ * - we can not call __ieee80211_scan_completed() as when
+ * SCAN_HW_SCANNING bit is set this function change
+ * local->hw_scan_req to operate on 5G band, what race with
+ * driver which can use local->hw_scan_req
+ *
+ * - we can not cancel scan_work since driver can schedule it
+ * by ieee80211_scan_completed(..., true) to finish scan
+ *
+ * Hence we only call the cancel_hw_scan() callback, but the low-level
+ * driver is still responsible for calling ieee80211_scan_completed()
+ * after the scan was completed/aborted.
+ */
- cancel_delayed_work_sync(&local->scan_work);
+ mutex_lock(&local->mtx);
+ if (!local->scan_req)
+ goto out;
+
+ if (test_bit(SCAN_HW_SCANNING, &local->scanning)) {
+ if (local->ops->cancel_hw_scan)
+ drv_cancel_hw_scan(local, local->scan_sdata);
+ goto out;
+ }
/*
- * Only call this function when a scan can't be
- * queued -- mostly at suspend under RTNL.
+ * If the work is currently running, it must be blocked on
+ * the mutex, but we'll set scan_sdata = NULL and it'll
+ * simply exit once it acquires the mutex.
*/
- mutex_lock(&local->scan_mtx);
- abortscan = test_bit(SCAN_SW_SCANNING, &local->scanning) ||
- (!local->scanning && local->scan_req);
- mutex_unlock(&local->scan_mtx);
+ cancel_delayed_work(&local->scan_work);
+ /* and clean up */
+ __ieee80211_scan_completed(&local->hw, true, false);
+out:
+ mutex_unlock(&local->mtx);
+}
+
+int ieee80211_request_sched_scan_start(struct ieee80211_sub_if_data *sdata,
+ struct cfg80211_sched_scan_request *req)
+{
+ struct ieee80211_local *local = sdata->local;
+ int ret, i;
+
+ mutex_lock(&sdata->local->mtx);
+
+ if (local->sched_scanning) {
+ ret = -EBUSY;
+ goto out;
+ }
+
+ if (!local->ops->sched_scan_start) {
+ ret = -ENOTSUPP;
+ goto out;
+ }
+
+ for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
+ local->sched_scan_ies.ie[i] = kzalloc(2 +
+ IEEE80211_MAX_SSID_LEN +
+ local->scan_ies_len +
+ req->ie_len,
+ GFP_KERNEL);
+ if (!local->sched_scan_ies.ie[i]) {
+ ret = -ENOMEM;
+ goto out_free;
+ }
+
+ local->sched_scan_ies.len[i] =
+ ieee80211_build_preq_ies(local,
+ local->sched_scan_ies.ie[i],
+ req->ie, req->ie_len, i,
+ (u32) -1, 0);
+ }
+
+ ret = drv_sched_scan_start(local, sdata, req,
+ &local->sched_scan_ies);
+ if (ret == 0) {
+ local->sched_scanning = true;
+ goto out;
+ }
+
+out_free:
+ while (i > 0)
+ kfree(local->sched_scan_ies.ie[--i]);
+out:
+ mutex_unlock(&sdata->local->mtx);
+ return ret;
+}
+
+int ieee80211_request_sched_scan_stop(struct ieee80211_sub_if_data *sdata)
+{
+ struct ieee80211_local *local = sdata->local;
+ int ret = 0, i;
+
+ mutex_lock(&sdata->local->mtx);
+
+ if (!local->ops->sched_scan_stop) {
+ ret = -ENOTSUPP;
+ goto out;
+ }
+
+ if (local->sched_scanning) {
+ for (i = 0; i < IEEE80211_NUM_BANDS; i++)
+ kfree(local->sched_scan_ies.ie[i]);
+
+ drv_sched_scan_stop(local, sdata);
+ local->sched_scanning = false;
+ }
+out:
+ mutex_unlock(&sdata->local->mtx);
+
+ return ret;
+}
+
+void ieee80211_sched_scan_results(struct ieee80211_hw *hw)
+{
+ struct ieee80211_local *local = hw_to_local(hw);
+
+ trace_api_sched_scan_results(local);
+
+ cfg80211_sched_scan_results(hw->wiphy);
+}
+EXPORT_SYMBOL(ieee80211_sched_scan_results);
+
+void ieee80211_sched_scan_stopped_work(struct work_struct *work)
+{
+ struct ieee80211_local *local =
+ container_of(work, struct ieee80211_local,
+ sched_scan_stopped_work);
+ int i;
+
+ mutex_lock(&local->mtx);
+
+ if (!local->sched_scanning) {
+ mutex_unlock(&local->mtx);
+ return;
+ }
+
+ for (i = 0; i < IEEE80211_NUM_BANDS; i++)
+ kfree(local->sched_scan_ies.ie[i]);
+
+ local->sched_scanning = false;
+
+ mutex_unlock(&local->mtx);
+
+ cfg80211_sched_scan_stopped(local->hw.wiphy);
+}
+
+void ieee80211_sched_scan_stopped(struct ieee80211_hw *hw)
+{
+ struct ieee80211_local *local = hw_to_local(hw);
+
+ trace_api_sched_scan_stopped(local);
- if (abortscan)
- ieee80211_scan_completed(&local->hw, true);
+ ieee80211_queue_work(&local->hw, &local->sched_scan_stopped_work);
}
+EXPORT_SYMBOL(ieee80211_sched_scan_stopped);
Code Review / linux-2.6.git / blobdiff