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2024-05-10 37f49e37ab4cb5d0bc4c60eb5c6d4dd57db767bb 
 kernel/net/mac80211/offchannel.c
....@@ -1,3 +1,4 @@
1
+// SPDX-License-Identifier: GPL-2.0-only
12 /*
23  * Off-channel operation helpers
34  *
....@@ -7,10 +8,7 @@
78  * Copyright 2006-2007	Jiri Benc <jbenc@suse.cz>
89  * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
910  * Copyright 2009	Johannes Berg <johannes@sipsolutions.net>
10
- *
11
- * This program is free software; you can redistribute it and/or modify
12
- * it under the terms of the GNU General Public License version 2 as
13
- * published by the Free Software Foundation.
11
+ * Copyright (C) 2019 Intel Corporation
1412  */
1513 #include <linux/export.h>
1614 #include <net/mac80211.h>
....@@ -28,8 +26,7 @@
2826 {
2927 	struct ieee80211_local *local = sdata->local;
3028 	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
31
-
32
-	local->offchannel_ps_enabled = false;
29
+	bool offchannel_ps_enabled = false;
3330 
3431 	/* FIXME: what to do when local->pspolling is true? */
3532 
....@@ -40,12 +37,12 @@
4037 	cancel_work_sync(&local->dynamic_ps_enable_work);
4138 
4239 	if (local->hw.conf.flags & IEEE80211_CONF_PS) {
43
-		local->offchannel_ps_enabled = true;
40
+		offchannel_ps_enabled = true;
4441 		local->hw.conf.flags &= ~IEEE80211_CONF_PS;
4542 		ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
4643 	}
4744 
48
-	if (!local->offchannel_ps_enabled ||
45
+	if (!offchannel_ps_enabled ||
4946 	    !ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK))
5047 		/*
5148 		 * If power save was enabled, no need to send a nullfunc
....@@ -60,38 +57,19 @@
6057 		ieee80211_send_nullfunc(local, sdata, true);
6158 }
6259 
63
-/* inform AP that we are awake again, unless power save is enabled */
60
+/* inform AP that we are awake again */
6461 static void ieee80211_offchannel_ps_disable(struct ieee80211_sub_if_data *sdata)
6562 {
6663 	struct ieee80211_local *local = sdata->local;
6764 
6865 	if (!local->ps_sdata)
6966 		ieee80211_send_nullfunc(local, sdata, false);
70
-	else if (local->offchannel_ps_enabled) {
67
+	else if (local->hw.conf.dynamic_ps_timeout > 0) {
7168 		/*
72
-		 * In !IEEE80211_HW_PS_NULLFUNC_STACK case the hardware
73
-		 * will send a nullfunc frame with the powersave bit set
74
-		 * even though the AP already knows that we are sleeping.
75
-		 * This could be avoided by sending a null frame with power
76
-		 * save bit disabled before enabling the power save, but
77
-		 * this doesn't gain anything.
78
-		 *
79
-		 * When IEEE80211_HW_PS_NULLFUNC_STACK is enabled, no need
80
-		 * to send a nullfunc frame because AP already knows that
81
-		 * we are sleeping, let's just enable power save mode in
82
-		 * hardware.
83
-		 */
84
-		/* TODO:  Only set hardware if CONF_PS changed?
85
-		 * TODO:  Should we set offchannel_ps_enabled to false?
86
-		 */
87
-		local->hw.conf.flags |= IEEE80211_CONF_PS;
88
-		ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
89
-	} else if (local->hw.conf.dynamic_ps_timeout > 0) {
90
-		/*
91
-		 * If IEEE80211_CONF_PS was not set and the dynamic_ps_timer
92
-		 * had been running before leaving the operating channel,
93
-		 * restart the timer now and send a nullfunc frame to inform
94
-		 * the AP that we are awake.
69
+		 * the dynamic_ps_timer had been running before leaving the
70
+		 * operating channel, restart the timer now and send a nullfunc
71
+		 * frame to inform the AP that we are awake so that AP sends
72
+		 * the buffered packets (if any).
9573 		 */
9674 		ieee80211_send_nullfunc(local, sdata, false);
9775 		mod_timer(&local->dynamic_ps_timer, jiffies +
....@@ -202,6 +180,10 @@
202180 		cfg80211_remain_on_channel_expired(&roc->sdata->wdev,
203181 						   roc->cookie, roc->chan,
204182 						   GFP_KERNEL);
183
+	else
184
+		cfg80211_tx_mgmt_expired(&roc->sdata->wdev,
185
+					 roc->mgmt_tx_cookie,
186
+					 roc->chan, GFP_KERNEL);
205187 
206188 	list_del(&roc->list);
207189 	kfree(roc);
....@@ -262,7 +244,7 @@
262244 	if (roc->mgmt_tx_cookie) {
263245 		if (!WARN_ON(!roc->frame)) {
264246 			ieee80211_tx_skb_tid_band(roc->sdata, roc->frame, 7,
265
-						  roc->chan->band, 0);
247
+						  roc->chan->band);
266248 			roc->frame = NULL;
267249 		}
268250 	} else {
....@@ -555,6 +537,10 @@
555537 
556538 	lockdep_assert_held(&local->mtx);
557539 
540
+	if (channel->freq_offset)
541
+		/* this may work, but is untested */
542
+		return -EOPNOTSUPP;
543
+
558544 	if (local->use_chanctx && !local->ops->remain_on_channel)
559545 		return -EOPNOTSUPP;
560546 
....@@ -731,7 +717,7 @@
731717 	}
732718 
733719 	if (local->ops->remain_on_channel) {
734
-		ret = drv_cancel_remain_on_channel(local);
720
+		ret = drv_cancel_remain_on_channel(local, roc->sdata);
735721 		if (WARN_ON_ONCE(ret)) {
736722 			mutex_unlock(&local->mtx);
737723 			return ret;
....@@ -802,13 +788,13 @@
802788 		if (!sdata->vif.bss_conf.ibss_joined)
803789 			need_offchan = true;
804790 #ifdef CONFIG_MAC80211_MESH
805
-		/* fall through */
791
+		fallthrough;
806792 	case NL80211_IFTYPE_MESH_POINT:
807793 		if (ieee80211_vif_is_mesh(&sdata->vif) &&
808794 		    !sdata->u.mesh.mesh_id_len)
809795 			need_offchan = true;
810796 #endif
811
-		/* fall through */
797
+		fallthrough;
812798 	case NL80211_IFTYPE_AP:
813799 	case NL80211_IFTYPE_AP_VLAN:
814800 	case NL80211_IFTYPE_P2P_GO:
....@@ -910,7 +896,7 @@
910896 		if (beacon)
911897 			for (i = 0; i < params->n_csa_offsets; i++)
912898 				data[params->csa_offsets[i]] =
913
-					beacon->csa_current_counter;
899
+					beacon->cntdwn_current_counter;
914900 
915901 		rcu_read_unlock();
916902 	}
....@@ -990,7 +976,7 @@
990976 		if (roc->started) {
991977 			if (local->ops->remain_on_channel) {
992978 				/* can race, so ignore return value */
993
-				drv_cancel_remain_on_channel(local);
979
+				drv_cancel_remain_on_channel(local, sdata);
994980 				ieee80211_roc_notify_destroy(roc);
995981 			} else {
996982 				roc->abort = true;