}
ieee80211_rx_result
-ieee80211_scan_rx(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
- struct ieee80211_rx_status *rx_status)
+ieee80211_scan_rx(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb)
{
+ struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb);
struct ieee80211_mgmt *mgmt;
struct ieee80211_bss *bss;
u8 *elements;
was_hw_scan = local->hw_scanning;
local->hw_scanning = false;
local->sw_scanning = false;
+ local->scan_channel = NULL;
/* we only have to protect scan_req and hw/sw scan */
mutex_unlock(&local->scan_mtx);
- if (was_hw_scan) {
- /*
- * Somebody might have requested channel change during scan
- * that we won't have acted upon, try now. ieee80211_hw_config
- * will set the flag based on actual changes.
- */
- ieee80211_hw_config(local, 0);
- goto done;
- }
-
ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
+ if (was_hw_scan)
+ goto done;
netif_tx_lock_bh(local->mdev);
netif_addr_lock(local->mdev);
mutex_unlock(&local->iflist_mtx);
done:
+ ieee80211_recalc_idle(local);
ieee80211_mlme_notify_scan_completed(local);
ieee80211_ibss_notify_scan_completed(local);
ieee80211_mesh_notify_scan_completed(local);
* 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)
} else
local->sw_scanning = false;
+ ieee80211_recalc_idle(local);
+
local->scan_req = NULL;
local->scan_sdata = NULL;
}
if (skip)
break;
- next_delay = IEEE80211_PROBE_DELAY +
- usecs_to_jiffies(local->hw.channel_change_time);
+ /*
+ * Probe delay is used to update the NAV, cf. 11.1.3.2.2
+ * (which unfortunately doesn't say _why_ step a) is done,
+ * but it waits for the probe delay or until a frame is
+ * received - and the received frame would update the NAV).
+ * For now, we do not support waiting until a frame is
+ * received.
+ *
+ * In any case, it is not necessary for a passive scan.
+ */
+ if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN ||
+ !local->scan_req->n_ssids) {
+ next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
+ break;
+ }
+
+ next_delay = IEEE80211_PROBE_DELAY;
local->scan_state = SCAN_SEND_PROBE;
break;
case SCAN_SEND_PROBE:
- next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
- local->scan_state = SCAN_SET_CHANNEL;
-
- if (local->scan_channel->flags & IEEE80211_CHAN_PASSIVE_SCAN ||
- !local->scan_req->n_ssids)
- break;
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);
+
+ /*
+ * After sending probe requests, wait for probe responses
+ * on the channel.
+ */
next_delay = IEEE80211_CHANNEL_TIME;
+ local->scan_state = SCAN_SET_CHANNEL;
break;
}
mutex_unlock(&local->scan_mtx);
return ret;
}
+
+void ieee80211_scan_cancel(struct ieee80211_local *local)
+{
+ bool swscan;
+
+ cancel_delayed_work_sync(&local->scan_work);
+
+ /*
+ * Only call this function when a scan can't be
+ * queued -- mostly at suspend under RTNL.
+ */
+ mutex_lock(&local->scan_mtx);
+ swscan = local->sw_scanning;
+ mutex_unlock(&local->scan_mtx);
+
+ if (swscan)
+ ieee80211_scan_completed(&local->hw, true);
+}