Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * OCB mode implementation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * Copyright: (c) 2014 Czech Technical University in Prague
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  *            (c) 2014 Volkswagen Group Research
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  * Author:    Rostislav Lisovy <rostislav.lisovy@fel.cvut.cz>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  * Funded by: Volkswagen Group Research
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <linux/delay.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <linux/if_ether.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <linux/skbuff.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <linux/if_arp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include <linux/etherdevice.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include <linux/rtnetlink.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #include <net/mac80211.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #include <asm/unaligned.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) #include "ieee80211_i.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) #include "driver-ops.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) #include "rate.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) #define IEEE80211_OCB_HOUSEKEEPING_INTERVAL		(60 * HZ)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) #define IEEE80211_OCB_PEER_INACTIVITY_LIMIT		(240 * HZ)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) #define IEEE80211_OCB_MAX_STA_ENTRIES			128
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29)  * enum ocb_deferred_task_flags - mac80211 OCB deferred tasks
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30)  * @OCB_WORK_HOUSEKEEPING: run the periodic OCB housekeeping tasks
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32)  * These flags are used in @wrkq_flags field of &struct ieee80211_if_ocb
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) enum ocb_deferred_task_flags {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 	OCB_WORK_HOUSEKEEPING,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) void ieee80211_ocb_rx_no_sta(struct ieee80211_sub_if_data *sdata,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 			     const u8 *bssid, const u8 *addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 			     u32 supp_rates)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 	struct ieee80211_if_ocb *ifocb = &sdata->u.ocb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 	struct ieee80211_local *local = sdata->local;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 	struct ieee80211_chanctx_conf *chanctx_conf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 	struct ieee80211_supported_band *sband;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 	enum nl80211_bss_scan_width scan_width;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	struct sta_info *sta;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 	int band;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 	/* XXX: Consider removing the least recently used entry and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 	 *      allow new one to be added.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	if (local->num_sta >= IEEE80211_OCB_MAX_STA_ENTRIES) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 		net_info_ratelimited("%s: No room for a new OCB STA entry %pM\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 				     sdata->name, addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 	ocb_dbg(sdata, "Adding new OCB station %pM\n", addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 	rcu_read_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 	chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 	if (WARN_ON_ONCE(!chanctx_conf)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 		rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 	band = chanctx_conf->def.chan->band;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 	scan_width = cfg80211_chandef_to_scan_width(&chanctx_conf->def);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 	rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 	sta = sta_info_alloc(sdata, addr, GFP_ATOMIC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 	if (!sta)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	/* Add only mandatory rates for now */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 	sband = local->hw.wiphy->bands[band];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 	sta->sta.supp_rates[band] =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 		ieee80211_mandatory_rates(sband, scan_width);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 	spin_lock(&ifocb->incomplete_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 	list_add(&sta->list, &ifocb->incomplete_stations);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 	spin_unlock(&ifocb->incomplete_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 	ieee80211_queue_work(&local->hw, &sdata->work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) static struct sta_info *ieee80211_ocb_finish_sta(struct sta_info *sta)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 	__acquires(RCU)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 	struct ieee80211_sub_if_data *sdata = sta->sdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 	u8 addr[ETH_ALEN];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 	memcpy(addr, sta->sta.addr, ETH_ALEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 	ocb_dbg(sdata, "Adding new IBSS station %pM (dev=%s)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 		addr, sdata->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 	sta_info_move_state(sta, IEEE80211_STA_AUTH);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 	sta_info_move_state(sta, IEEE80211_STA_ASSOC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 	sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	rate_control_rate_init(sta);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	/* If it fails, maybe we raced another insertion? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 	if (sta_info_insert_rcu(sta))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 		return sta_info_get(sdata, addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 	return sta;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) static void ieee80211_ocb_housekeeping(struct ieee80211_sub_if_data *sdata)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 	struct ieee80211_if_ocb *ifocb = &sdata->u.ocb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 	ocb_dbg(sdata, "Running ocb housekeeping\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 	ieee80211_sta_expire(sdata, IEEE80211_OCB_PEER_INACTIVITY_LIMIT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 	mod_timer(&ifocb->housekeeping_timer,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 		  round_jiffies(jiffies + IEEE80211_OCB_HOUSEKEEPING_INTERVAL));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) void ieee80211_ocb_work(struct ieee80211_sub_if_data *sdata)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 	struct ieee80211_if_ocb *ifocb = &sdata->u.ocb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 	struct sta_info *sta;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 	if (ifocb->joined != true)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 	sdata_lock(sdata);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 	spin_lock_bh(&ifocb->incomplete_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 	while (!list_empty(&ifocb->incomplete_stations)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 		sta = list_first_entry(&ifocb->incomplete_stations,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 				       struct sta_info, list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 		list_del(&sta->list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 		spin_unlock_bh(&ifocb->incomplete_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 		ieee80211_ocb_finish_sta(sta);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 		rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 		spin_lock_bh(&ifocb->incomplete_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 	spin_unlock_bh(&ifocb->incomplete_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 	if (test_and_clear_bit(OCB_WORK_HOUSEKEEPING, &ifocb->wrkq_flags))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 		ieee80211_ocb_housekeeping(sdata);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 	sdata_unlock(sdata);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) static void ieee80211_ocb_housekeeping_timer(struct timer_list *t)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 	struct ieee80211_sub_if_data *sdata =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 		from_timer(sdata, t, u.ocb.housekeeping_timer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 	struct ieee80211_local *local = sdata->local;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 	struct ieee80211_if_ocb *ifocb = &sdata->u.ocb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 	set_bit(OCB_WORK_HOUSEKEEPING, &ifocb->wrkq_flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 	ieee80211_queue_work(&local->hw, &sdata->work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) void ieee80211_ocb_setup_sdata(struct ieee80211_sub_if_data *sdata)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 	struct ieee80211_if_ocb *ifocb = &sdata->u.ocb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 	timer_setup(&ifocb->housekeeping_timer,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 		    ieee80211_ocb_housekeeping_timer, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 	INIT_LIST_HEAD(&ifocb->incomplete_stations);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 	spin_lock_init(&ifocb->incomplete_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) int ieee80211_ocb_join(struct ieee80211_sub_if_data *sdata,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 		       struct ocb_setup *setup)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 	struct ieee80211_local *local = sdata->local;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 	struct ieee80211_if_ocb *ifocb = &sdata->u.ocb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 	u32 changed = BSS_CHANGED_OCB | BSS_CHANGED_BSSID;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 	int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 	if (ifocb->joined == true)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 	sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 	sdata->smps_mode = IEEE80211_SMPS_OFF;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 	sdata->needed_rx_chains = sdata->local->rx_chains;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 	mutex_lock(&sdata->local->mtx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 	err = ieee80211_vif_use_channel(sdata, &setup->chandef,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 					IEEE80211_CHANCTX_SHARED);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 	mutex_unlock(&sdata->local->mtx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 	if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 		return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 	ieee80211_bss_info_change_notify(sdata, changed);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 	ifocb->joined = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 	set_bit(OCB_WORK_HOUSEKEEPING, &ifocb->wrkq_flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 	ieee80211_queue_work(&local->hw, &sdata->work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 	netif_carrier_on(sdata->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) int ieee80211_ocb_leave(struct ieee80211_sub_if_data *sdata)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 	struct ieee80211_if_ocb *ifocb = &sdata->u.ocb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 	struct ieee80211_local *local = sdata->local;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 	struct sta_info *sta;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 	ifocb->joined = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 	sta_info_flush(sdata);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 	spin_lock_bh(&ifocb->incomplete_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 	while (!list_empty(&ifocb->incomplete_stations)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 		sta = list_first_entry(&ifocb->incomplete_stations,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 				       struct sta_info, list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 		list_del(&sta->list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 		spin_unlock_bh(&ifocb->incomplete_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 		sta_info_free(local, sta);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 		spin_lock_bh(&ifocb->incomplete_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 	spin_unlock_bh(&ifocb->incomplete_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 	netif_carrier_off(sdata->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 	clear_bit(SDATA_STATE_OFFCHANNEL, &sdata->state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 	ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_OCB);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 	mutex_lock(&sdata->local->mtx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 	ieee80211_vif_release_channel(sdata);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 	mutex_unlock(&sdata->local->mtx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 	skb_queue_purge(&sdata->skb_queue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 	del_timer_sync(&sdata->u.ocb.housekeeping_timer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 	/* If the timer fired while we waited for it, it will have
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 	 * requeued the work. Now the work will be running again
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 	 * but will not rearm the timer again because it checks
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 	 * whether we are connected to the network or not -- at this
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 	 * point we shouldn't be anymore.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) }