57 static int iwl_send_scan_abort(struct iwl_priv *priv)  in iwl_send_scan_abort()  argument
69 	if (!test_bit(STATUS_READY, &priv->status) ||  in iwl_send_scan_abort()
70 	    !test_bit(STATUS_SCAN_HW, &priv->status) ||  in iwl_send_scan_abort()
71 	    test_bit(STATUS_FW_ERROR, &priv->status))  in iwl_send_scan_abort()
74 	ret = iwl_dvm_send_cmd(priv, &cmd);  in iwl_send_scan_abort()
86 		IWL_DEBUG_SCAN(priv, "SCAN_ABORT ret %d.\n",  in iwl_send_scan_abort()
95 static void iwl_complete_scan(struct iwl_priv *priv, bool aborted)  in iwl_complete_scan()  argument
98 	if (priv->scan_request) {  in iwl_complete_scan()
99 		IWL_DEBUG_SCAN(priv, "Complete scan in mac80211\n");  in iwl_complete_scan()
100 		ieee80211_scan_completed(priv->hw, aborted);  in iwl_complete_scan()
103 	priv->scan_type = IWL_SCAN_NORMAL;  in iwl_complete_scan()
104 	priv->scan_vif = NULL;  in iwl_complete_scan()
105 	priv->scan_request = NULL;  in iwl_complete_scan()
108 static void iwl_process_scan_complete(struct iwl_priv *priv)  in iwl_process_scan_complete()  argument
112 	lockdep_assert_held(&priv->mutex);  in iwl_process_scan_complete()
114 	if (!test_and_clear_bit(STATUS_SCAN_COMPLETE, &priv->status))  in iwl_process_scan_complete()
117 	IWL_DEBUG_SCAN(priv, "Completed scan.\n");  in iwl_process_scan_complete()
119 	cancel_delayed_work(&priv->scan_check);  in iwl_process_scan_complete()
121 	aborted = test_and_clear_bit(STATUS_SCAN_ABORTING, &priv->status);  in iwl_process_scan_complete()
123 		IWL_DEBUG_SCAN(priv, "Aborted scan completed.\n");  in iwl_process_scan_complete()
125 	if (!test_and_clear_bit(STATUS_SCANNING, &priv->status)) {  in iwl_process_scan_complete()
126 		IWL_DEBUG_SCAN(priv, "Scan already completed.\n");  in iwl_process_scan_complete()
130 	if (priv->scan_type != IWL_SCAN_NORMAL && !aborted) {  in iwl_process_scan_complete()
134 		if (priv->scan_request == NULL)  in iwl_process_scan_complete()
138 		err = iwl_scan_initiate(priv, priv->scan_vif, IWL_SCAN_NORMAL,  in iwl_process_scan_complete()
139 					priv->scan_request->channels[0]->band);  in iwl_process_scan_complete()
141 			IWL_DEBUG_SCAN(priv,  in iwl_process_scan_complete()
151 	iwl_complete_scan(priv, aborted);  in iwl_process_scan_complete()
155 	if (!iwl_is_ready_rf(priv))  in iwl_process_scan_complete()
158 	iwlagn_post_scan(priv);  in iwl_process_scan_complete()
161 void iwl_force_scan_end(struct iwl_priv *priv)  in iwl_force_scan_end()  argument
163 	lockdep_assert_held(&priv->mutex);  in iwl_force_scan_end()
165 	if (!test_bit(STATUS_SCANNING, &priv->status)) {  in iwl_force_scan_end()
166 		IWL_DEBUG_SCAN(priv, "Forcing scan end while not scanning\n");  in iwl_force_scan_end()
170 	IWL_DEBUG_SCAN(priv, "Forcing scan end\n");  in iwl_force_scan_end()
171 	clear_bit(STATUS_SCANNING, &priv->status);  in iwl_force_scan_end()
172 	clear_bit(STATUS_SCAN_HW, &priv->status);  in iwl_force_scan_end()
173 	clear_bit(STATUS_SCAN_ABORTING, &priv->status);  in iwl_force_scan_end()
174 	clear_bit(STATUS_SCAN_COMPLETE, &priv->status);  in iwl_force_scan_end()
175 	iwl_complete_scan(priv, true);  in iwl_force_scan_end()
178 static void iwl_do_scan_abort(struct iwl_priv *priv)  in iwl_do_scan_abort()  argument
182 	lockdep_assert_held(&priv->mutex);  in iwl_do_scan_abort()
184 	if (!test_bit(STATUS_SCANNING, &priv->status)) {  in iwl_do_scan_abort()
185 		IWL_DEBUG_SCAN(priv, "Not performing scan to abort\n");  in iwl_do_scan_abort()
189 	if (test_and_set_bit(STATUS_SCAN_ABORTING, &priv->status)) {  in iwl_do_scan_abort()
190 		IWL_DEBUG_SCAN(priv, "Scan abort in progress\n");  in iwl_do_scan_abort()
194 	ret = iwl_send_scan_abort(priv);  in iwl_do_scan_abort()
196 		IWL_DEBUG_SCAN(priv, "Send scan abort failed %d\n", ret);  in iwl_do_scan_abort()
197 		iwl_force_scan_end(priv);  in iwl_do_scan_abort()
199 		IWL_DEBUG_SCAN(priv, "Successfully send scan abort\n");  in iwl_do_scan_abort()
205 int iwl_scan_cancel(struct iwl_priv *priv)  in iwl_scan_cancel()  argument
207 	IWL_DEBUG_SCAN(priv, "Queuing abort scan\n");  in iwl_scan_cancel()
208 	queue_work(priv->workqueue, &priv->abort_scan);  in iwl_scan_cancel()
217 void iwl_scan_cancel_timeout(struct iwl_priv *priv, unsigned long ms)  in iwl_scan_cancel_timeout()  argument
221 	lockdep_assert_held(&priv->mutex);  in iwl_scan_cancel_timeout()
223 	IWL_DEBUG_SCAN(priv, "Scan cancel timeout\n");  in iwl_scan_cancel_timeout()
225 	iwl_do_scan_abort(priv);  in iwl_scan_cancel_timeout()
228 		if (!test_bit(STATUS_SCAN_HW, &priv->status))  in iwl_scan_cancel_timeout()
246 	iwl_process_scan_complete(priv);  in iwl_scan_cancel_timeout()
250 static int iwl_rx_reply_scan(struct iwl_priv *priv,  in iwl_rx_reply_scan()  argument
258 	IWL_DEBUG_SCAN(priv, "Scan request status = 0x%x\n", notif->status);  in iwl_rx_reply_scan()
264 static int iwl_rx_scan_start_notif(struct iwl_priv *priv,  in iwl_rx_scan_start_notif()  argument
271 	priv->scan_start_tsf = le32_to_cpu(notif->tsf_low);  in iwl_rx_scan_start_notif()
272 	IWL_DEBUG_SCAN(priv, "Scan start: "  in iwl_rx_scan_start_notif()
285 static int iwl_rx_scan_results_notif(struct iwl_priv *priv,  in iwl_rx_scan_results_notif()  argument
293 	IWL_DEBUG_SCAN(priv, "Scan ch.res: "  in iwl_rx_scan_results_notif()
304 		       le32_to_cpu(notif->tsf_low) - priv->scan_start_tsf);  in iwl_rx_scan_results_notif()
310 static int iwl_rx_scan_complete_notif(struct iwl_priv *priv,  in iwl_rx_scan_complete_notif()  argument
317 	IWL_DEBUG_SCAN(priv, "Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",  in iwl_rx_scan_complete_notif()
322 	IWL_DEBUG_SCAN(priv, "Scan on %sGHz took %dms\n",  in iwl_rx_scan_complete_notif()
323 		       (priv->scan_band == IEEE80211_BAND_2GHZ) ? "2.4" : "5.2",  in iwl_rx_scan_complete_notif()
324 		       jiffies_to_msecs(jiffies - priv->scan_start));  in iwl_rx_scan_complete_notif()
334 	set_bit(STATUS_SCAN_COMPLETE, &priv->status);  in iwl_rx_scan_complete_notif()
335 	clear_bit(STATUS_SCAN_HW, &priv->status);  in iwl_rx_scan_complete_notif()
336 	queue_work(priv->workqueue, &priv->scan_completed);  in iwl_rx_scan_complete_notif()
338 	if (priv->iw_mode != NL80211_IFTYPE_ADHOC &&  in iwl_rx_scan_complete_notif()
339 	    iwl_advanced_bt_coexist(priv) &&  in iwl_rx_scan_complete_notif()
340 	    priv->bt_status != scan_notif->bt_status) {  in iwl_rx_scan_complete_notif()
343 			if (!priv->bt_ch_announce)  in iwl_rx_scan_complete_notif()
344 				priv->bt_traffic_load =  in iwl_rx_scan_complete_notif()
352 			priv->bt_traffic_load =  in iwl_rx_scan_complete_notif()
355 		priv->bt_status = scan_notif->bt_status;  in iwl_rx_scan_complete_notif()
356 		queue_work(priv->workqueue,  in iwl_rx_scan_complete_notif()
357 			   &priv->bt_traffic_change_work);  in iwl_rx_scan_complete_notif()
362 void iwl_setup_rx_scan_handlers(struct iwl_priv *priv)  in iwl_setup_rx_scan_handlers()  argument
365 	priv->rx_handlers[REPLY_SCAN_CMD] = iwl_rx_reply_scan;  in iwl_setup_rx_scan_handlers()
366 	priv->rx_handlers[SCAN_START_NOTIFICATION] = iwl_rx_scan_start_notif;  in iwl_setup_rx_scan_handlers()
367 	priv->rx_handlers[SCAN_RESULTS_NOTIFICATION] =  in iwl_setup_rx_scan_handlers()
369 	priv->rx_handlers[SCAN_COMPLETE_NOTIFICATION] =  in iwl_setup_rx_scan_handlers()
373 static u16 iwl_get_active_dwell_time(struct iwl_priv *priv,  in iwl_get_active_dwell_time()  argument
384 static u16 iwl_limit_dwell(struct iwl_priv *priv, u16 dwell_time)  in iwl_limit_dwell()  argument
401 	for_each_context(priv, ctx) {  in iwl_limit_dwell()
442 static u16 iwl_get_passive_dwell_time(struct iwl_priv *priv,  in iwl_get_passive_dwell_time()  argument
449 	return iwl_limit_dwell(priv, passive);  in iwl_get_passive_dwell_time()
453 static u8 iwl_get_single_channel_number(struct iwl_priv *priv,  in iwl_get_single_channel_number()  argument
456 	struct ieee80211_supported_band *sband = priv->hw->wiphy->bands[band];  in iwl_get_single_channel_number()
463 		for_each_context(priv, ctx) {  in iwl_get_single_channel_number()
480 static int iwl_get_channel_for_reset_scan(struct iwl_priv *priv,  in iwl_get_channel_for_reset_scan()  argument
488 	sband = iwl_get_hw_mode(priv, band);  in iwl_get_channel_for_reset_scan()
490 		IWL_ERR(priv, "invalid band\n");  in iwl_get_channel_for_reset_scan()
494 	channel = iwl_get_single_channel_number(priv, band);  in iwl_get_channel_for_reset_scan()
511 	IWL_ERR(priv, "no valid channel found\n");  in iwl_get_channel_for_reset_scan()
515 static int iwl_get_channels_for_scan(struct iwl_priv *priv,  in iwl_get_channels_for_scan()  argument
528 	sband = iwl_get_hw_mode(priv, band);  in iwl_get_channels_for_scan()
532 	active_dwell = iwl_get_active_dwell_time(priv, band, n_probes);  in iwl_get_channels_for_scan()
533 	passive_dwell = iwl_get_passive_dwell_time(priv, band);  in iwl_get_channels_for_scan()
538 	for (i = 0, added = 0; i < priv->scan_request->n_channels; i++) {  in iwl_get_channels_for_scan()
539 		chan = priv->scan_request->channels[i];  in iwl_get_channels_for_scan()
570 		IWL_DEBUG_SCAN(priv, "Scanning ch=%d prob=0x%X [%s %d]\n",  in iwl_get_channels_for_scan()
581 	IWL_DEBUG_SCAN(priv, "total channels to scan %d\n", added);  in iwl_get_channels_for_scan()
637 static int iwlagn_request_scan(struct iwl_priv *priv, struct ieee80211_vif *vif)  in iwlagn_request_scan()  argument
644 	struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];  in iwlagn_request_scan()
650 	u8 rx_ant = priv->nvm_data->valid_rx_ant;  in iwlagn_request_scan()
655 	u8 scan_tx_antennas = priv->nvm_data->valid_tx_ant;  in iwlagn_request_scan()
659 			    priv->fw->ucode_capa.max_probe_length;  in iwlagn_request_scan()
663 	if (WARN_ON(priv->scan_type == IWL_SCAN_NORMAL &&  in iwlagn_request_scan()
664 		    (!priv->scan_request ||  in iwlagn_request_scan()
665 		     priv->scan_request->n_channels > MAX_SCAN_CHANNEL)))  in iwlagn_request_scan()
668 	lockdep_assert_held(&priv->mutex);  in iwlagn_request_scan()
673 	if (!priv->scan_cmd) {  in iwlagn_request_scan()
674 		priv->scan_cmd = kmalloc(scan_cmd_size, GFP_KERNEL);  in iwlagn_request_scan()
675 		if (!priv->scan_cmd) {  in iwlagn_request_scan()
676 			IWL_DEBUG_SCAN(priv,  in iwlagn_request_scan()
681 	scan = priv->scan_cmd;  in iwlagn_request_scan()
687 	if (iwl_is_any_associated(priv)) {  in iwlagn_request_scan()
693 		IWL_DEBUG_INFO(priv, "Scanning while associated...\n");  in iwlagn_request_scan()
694 		switch (priv->scan_type) {  in iwlagn_request_scan()
712 		IWL_DEBUG_SCAN(priv, "suspend_time 0x%X beacon interval %d\n",  in iwlagn_request_scan()
716 	switch (priv->scan_type) {  in iwlagn_request_scan()
718 		IWL_DEBUG_SCAN(priv, "Start internal passive scan.\n");  in iwlagn_request_scan()
727 		if (priv->scan_request->n_ssids) {  in iwlagn_request_scan()
729 			IWL_DEBUG_SCAN(priv, "Kicking off active scan\n");  in iwlagn_request_scan()
734 			ssid_len = priv->scan_request->ssids[0].ssid_len;  in iwlagn_request_scan()
735 			ssid = priv->scan_request->ssids[0].ssid;  in iwlagn_request_scan()
741 			for (i = priv->scan_request->n_ssids - 1; i >= 1; i--) {  in iwlagn_request_scan()
744 					priv->scan_request->ssids[i].ssid_len;  in iwlagn_request_scan()
746 				       priv->scan_request->ssids[i].ssid,  in iwlagn_request_scan()
747 				       priv->scan_request->ssids[i].ssid_len);  in iwlagn_request_scan()
753 			IWL_DEBUG_SCAN(priv, "Start passive scan.\n");  in iwlagn_request_scan()
761 	switch (priv->scan_band) {  in iwlagn_request_scan()
765 			priv->contexts[IWL_RXON_CTX_BSS].active.flags &  in iwlagn_request_scan()
768 		if ((priv->scan_request && priv->scan_request->no_cck) ||  in iwlagn_request_scan()
779 		if (priv->lib->bt_params &&  in iwlagn_request_scan()
780 		    priv->lib->bt_params->advanced_bt_coexist)  in iwlagn_request_scan()
787 		IWL_WARN(priv, "Invalid scan band\n");  in iwlagn_request_scan()
812 	if (priv->new_scan_threshold_behaviour)  in iwlagn_request_scan()
819 	band = priv->scan_band;  in iwlagn_request_scan()
822 	    priv->lib->bt_params &&  in iwlagn_request_scan()
823 	    priv->lib->bt_params->advanced_bt_coexist) {  in iwlagn_request_scan()
828 	priv->scan_tx_ant[band] = iwl_toggle_tx_ant(priv,  in iwlagn_request_scan()
829 						    priv->scan_tx_ant[band],  in iwlagn_request_scan()
831 	rate_flags |= iwl_ant_idx_to_flags(priv->scan_tx_ant[band]);  in iwlagn_request_scan()
838 	if (test_bit(STATUS_POWER_PMI, &priv->status) &&  in iwlagn_request_scan()
839 	    !(priv->hw->conf.flags & IEEE80211_CONF_IDLE)) {  in iwlagn_request_scan()
842 				((u8)(priv->chain_noise_data.active_chains));  in iwlagn_request_scan()
846 		IWL_DEBUG_SCAN(priv, "chain_noise_data.active_chains: %u\n",  in iwlagn_request_scan()
847 				priv->chain_noise_data.active_chains);  in iwlagn_request_scan()
851 	if (priv->lib->bt_params &&  in iwlagn_request_scan()
852 	    priv->lib->bt_params->advanced_bt_coexist &&  in iwlagn_request_scan()
853 	    priv->bt_full_concurrent) {  in iwlagn_request_scan()
860 		priv->nvm_data->valid_rx_ant << RXON_RX_CHAIN_VALID_POS;  in iwlagn_request_scan()
865 	switch (priv->scan_type) {  in iwlagn_request_scan()
870 					priv->scan_request->ie,  in iwlagn_request_scan()
871 					priv->scan_request->ie_len,  in iwlagn_request_scan()
891 	switch (priv->scan_type) {  in iwlagn_request_scan()
894 			iwl_get_channel_for_reset_scan(priv, vif, band,  in iwlagn_request_scan()
899 			iwl_get_channels_for_scan(priv, vif, band,  in iwlagn_request_scan()
906 		IWL_DEBUG_SCAN(priv, "channel count %d\n", scan->channel_count);  in iwlagn_request_scan()
917 	set_bit(STATUS_SCAN_HW, &priv->status);  in iwlagn_request_scan()
919 	ret = iwlagn_set_pan_params(priv);  in iwlagn_request_scan()
921 		clear_bit(STATUS_SCAN_HW, &priv->status);  in iwlagn_request_scan()
925 	ret = iwl_dvm_send_cmd(priv, &cmd);  in iwlagn_request_scan()
927 		clear_bit(STATUS_SCAN_HW, &priv->status);  in iwlagn_request_scan()
928 		iwlagn_set_pan_params(priv);  in iwlagn_request_scan()
934 void iwl_init_scan_params(struct iwl_priv *priv)  in iwl_init_scan_params()  argument
936 	u8 ant_idx = fls(priv->nvm_data->valid_tx_ant) - 1;  in iwl_init_scan_params()
937 	if (!priv->scan_tx_ant[IEEE80211_BAND_5GHZ])  in iwl_init_scan_params()
938 		priv->scan_tx_ant[IEEE80211_BAND_5GHZ] = ant_idx;  in iwl_init_scan_params()
939 	if (!priv->scan_tx_ant[IEEE80211_BAND_2GHZ])  in iwl_init_scan_params()
940 		priv->scan_tx_ant[IEEE80211_BAND_2GHZ] = ant_idx;  in iwl_init_scan_params()
943 int __must_check iwl_scan_initiate(struct iwl_priv *priv,  in iwl_scan_initiate()  argument
950 	lockdep_assert_held(&priv->mutex);  in iwl_scan_initiate()
952 	cancel_delayed_work(&priv->scan_check);  in iwl_scan_initiate()
954 	if (!iwl_is_ready_rf(priv)) {  in iwl_scan_initiate()
955 		IWL_WARN(priv, "Request scan called when driver not ready.\n");  in iwl_scan_initiate()
959 	if (test_bit(STATUS_SCAN_HW, &priv->status)) {  in iwl_scan_initiate()
960 		IWL_DEBUG_SCAN(priv,  in iwl_scan_initiate()
965 	if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {  in iwl_scan_initiate()
966 		IWL_DEBUG_SCAN(priv, "Scan request while abort pending.\n");  in iwl_scan_initiate()
970 	IWL_DEBUG_SCAN(priv, "Starting %sscan...\n",  in iwl_scan_initiate()
974 	set_bit(STATUS_SCANNING, &priv->status);  in iwl_scan_initiate()
975 	priv->scan_type = scan_type;  in iwl_scan_initiate()
976 	priv->scan_start = jiffies;  in iwl_scan_initiate()
977 	priv->scan_band = band;  in iwl_scan_initiate()
979 	ret = iwlagn_request_scan(priv, vif);  in iwl_scan_initiate()
981 		clear_bit(STATUS_SCANNING, &priv->status);  in iwl_scan_initiate()
982 		priv->scan_type = IWL_SCAN_NORMAL;  in iwl_scan_initiate()
986 	queue_delayed_work(priv->workqueue, &priv->scan_check,  in iwl_scan_initiate()
997 void iwl_internal_short_hw_scan(struct iwl_priv *priv)  in iwl_internal_short_hw_scan()  argument
999 	queue_work(priv->workqueue, &priv->start_internal_scan);  in iwl_internal_short_hw_scan()
1004 	struct iwl_priv *priv =  in iwl_bg_start_internal_scan()  local
1007 	IWL_DEBUG_SCAN(priv, "Start internal scan\n");  in iwl_bg_start_internal_scan()
1009 	mutex_lock(&priv->mutex);  in iwl_bg_start_internal_scan()
1011 	if (priv->scan_type == IWL_SCAN_RADIO_RESET) {  in iwl_bg_start_internal_scan()
1012 		IWL_DEBUG_SCAN(priv, "Internal scan already in progress\n");  in iwl_bg_start_internal_scan()
1016 	if (test_bit(STATUS_SCANNING, &priv->status)) {  in iwl_bg_start_internal_scan()
1017 		IWL_DEBUG_SCAN(priv, "Scan already in progress.\n");  in iwl_bg_start_internal_scan()
1021 	if (iwl_scan_initiate(priv, NULL, IWL_SCAN_RADIO_RESET, priv->band))  in iwl_bg_start_internal_scan()
1022 		IWL_DEBUG_SCAN(priv, "failed to start internal short scan\n");  in iwl_bg_start_internal_scan()
1024 	mutex_unlock(&priv->mutex);  in iwl_bg_start_internal_scan()
1029 	struct iwl_priv *priv =  in iwl_bg_scan_check()  local
1032 	IWL_DEBUG_SCAN(priv, "Scan check work\n");  in iwl_bg_scan_check()
1037 	mutex_lock(&priv->mutex);  in iwl_bg_scan_check()
1038 	iwl_force_scan_end(priv);  in iwl_bg_scan_check()
1039 	mutex_unlock(&priv->mutex);  in iwl_bg_scan_check()
1044 	struct iwl_priv *priv = container_of(work, struct iwl_priv, abort_scan);  in iwl_bg_abort_scan()  local
1046 	IWL_DEBUG_SCAN(priv, "Abort scan work\n");  in iwl_bg_abort_scan()
1050 	mutex_lock(&priv->mutex);  in iwl_bg_abort_scan()
1051 	iwl_scan_cancel_timeout(priv, 200);  in iwl_bg_abort_scan()
1052 	mutex_unlock(&priv->mutex);  in iwl_bg_abort_scan()
1057 	struct iwl_priv *priv =  in iwl_bg_scan_completed()  local
1060 	mutex_lock(&priv->mutex);  in iwl_bg_scan_completed()
1061 	iwl_process_scan_complete(priv);  in iwl_bg_scan_completed()
1062 	mutex_unlock(&priv->mutex);  in iwl_bg_scan_completed()
1065 void iwl_setup_scan_deferred_work(struct iwl_priv *priv)  in iwl_setup_scan_deferred_work()  argument
1067 	INIT_WORK(&priv->scan_completed, iwl_bg_scan_completed);  in iwl_setup_scan_deferred_work()
1068 	INIT_WORK(&priv->abort_scan, iwl_bg_abort_scan);  in iwl_setup_scan_deferred_work()
1069 	INIT_WORK(&priv->start_internal_scan, iwl_bg_start_internal_scan);  in iwl_setup_scan_deferred_work()
1070 	INIT_DELAYED_WORK(&priv->scan_check, iwl_bg_scan_check);  in iwl_setup_scan_deferred_work()
1073 void iwl_cancel_scan_deferred_work(struct iwl_priv *priv)  in iwl_cancel_scan_deferred_work()  argument
1075 	cancel_work_sync(&priv->start_internal_scan);  in iwl_cancel_scan_deferred_work()
1076 	cancel_work_sync(&priv->abort_scan);  in iwl_cancel_scan_deferred_work()
1077 	cancel_work_sync(&priv->scan_completed);  in iwl_cancel_scan_deferred_work()
1079 	if (cancel_delayed_work_sync(&priv->scan_check)) {  in iwl_cancel_scan_deferred_work()
1080 		mutex_lock(&priv->mutex);  in iwl_cancel_scan_deferred_work()
1081 		iwl_force_scan_end(priv);  in iwl_cancel_scan_deferred_work()
1082 		mutex_unlock(&priv->mutex);  in iwl_cancel_scan_deferred_work()