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))
+ if (channel == sdata->local->oper_channel)
return RX_CONTINUE;
dev_kfree_skb(skb);
bool was_hw_scan)
{
struct ieee80211_local *local = hw_to_local(hw);
- bool on_oper_chan;
- bool enable_beacons = false;
lockdep_assert_held(&local->mtx);
local->scanning = 0;
local->scan_channel = NULL;
- on_oper_chan = ieee80211_cfg_on_oper_channel(local);
-
- 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);
+ /* 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);
+ ieee80211_offchannel_return(local, true, true);
}
ieee80211_recalc_idle(local);
local->next_scan_state = SCAN_DECISION;
local->scan_channel_idx = 0;
- /* 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_offchannel_stop_vifs(local, true);
ieee80211_configure_filter(local);
ieee80211_hw_config(local, 0);
ieee80211_queue_delayed_work(&local->hw,
- &local->scan_work,
- IEEE80211_CHANNEL_TIME);
+ &local->scan_work, 0);
return 0;
}
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
- * 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.
- */
-
- 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;
- }
-
- *next_delay = 0;
-}
-
-static void ieee80211_scan_state_leave_oper_channel(struct ieee80211_local *local,
- unsigned long *next_delay)
-{
- /* 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?
+ * we're currently scanning a different channel, let's
+ * 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.
*/
- drv_flush(local, false);
- if (local->ops->flush)
- *next_delay = 0;
- else
- *next_delay = HZ / 10;
- /* remember when we left the operating channel */
- local->leave_oper_channel_time = jiffies;
+ 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)));
- /* advance to the next channel to be scanned */
- local->next_scan_state = SCAN_SET_CHANNEL;
-}
-
-static void ieee80211_scan_state_enter_oper_channel(struct ieee80211_local *local,
- unsigned long *next_delay)
-{
- /* switch back to the operating channel */
- local->scan_channel = NULL;
- if (!ieee80211_cfg_on_oper_channel(local))
- ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
+ 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);
- /*
- * 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, true, false);
+ if (associated && (!tx_empty || bad_latency || listen_int_exceeded))
+ local->next_scan_state = SCAN_SUSPEND;
+ else
+ local->next_scan_state = SCAN_SET_CHANNEL;
- *next_delay = HZ / 5;
- local->next_scan_state = SCAN_DECISION;
+ *next_delay = 0;
}
static void ieee80211_scan_state_set_channel(struct ieee80211_local *local,
local->scan_channel = chan;
- /* 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;
+ if (ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL))
+ skip = 1;
/* advance state machine to next channel/band */
local->scan_channel_idx++;
local->next_scan_state = SCAN_DECISION;
}
+static void ieee80211_scan_state_suspend(struct ieee80211_local *local,
+ unsigned long *next_delay)
+{
+ /* switch back to the operating channel */
+ local->scan_channel = NULL;
+ ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
+
+ /*
+ * 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, true, false);
+
+ *next_delay = HZ / 5;
+ /* afterwards, resume scan & go to next channel */
+ local->next_scan_state = SCAN_RESUME;
+}
+
+static void ieee80211_scan_state_resume(struct ieee80211_local *local,
+ unsigned long *next_delay)
+{
+ /* PS already is in off-channel mode */
+ ieee80211_offchannel_stop_vifs(local, false);
+
+ if (local->ops->flush) {
+ drv_flush(local, false);
+ *next_delay = 0;
+ } 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_DECISION;
+}
+
void ieee80211_scan_work(struct work_struct *work)
{
struct ieee80211_local *local =
case SCAN_SEND_PROBE:
ieee80211_scan_state_send_probe(local, &next_delay);
break;
- case SCAN_LEAVE_OPER_CHANNEL:
- ieee80211_scan_state_leave_oper_channel(local, &next_delay);
+ case SCAN_SUSPEND:
+ ieee80211_scan_state_suspend(local, &next_delay);
break;
- case SCAN_ENTER_OPER_CHANNEL:
- ieee80211_scan_state_enter_oper_channel(local, &next_delay);
+ case SCAN_RESUME:
+ ieee80211_scan_state_resume(local, &next_delay);
break;
}
} while (next_delay == 0);
git.openpandora.org / pandora-kernel.git / blobdiff