mac80211: merge a client mode channel switch handling fix

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@36531 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 47 insertions, 31 deletions

diff --git a/package/mac80211/patches/300-pending_work.patch b/package/mac80211/patches/300-pending_work.patch
index 379e8f47e..5d946ca10 100644
--- a/package/mac80211/patches/300-pending_work.patch
+++ b/package/mac80211/patches/300-pending_work.patch
@@ -1478,7 +1478,7 @@
  
  	if (!local->ops->channel_switch) {
  		/* call "hw_config" only if doing sw channel switch */
-@@ -1054,56 +1013,193 @@ static void ieee80211_chswitch_timer(uns
+@@ -1054,56 +1013,208 @@ static void ieee80211_chswitch_timer(uns
  	ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
  }
  
@@ -1487,7 +1487,8 @@
  ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
 -				 const struct ieee80211_channel_sw_ie *sw_elem,
 -				 struct ieee80211_bss *bss, u64 timestamp)
-+				 u64 timestamp, struct ieee802_11_elems *elems)
++				 u64 timestamp, struct ieee802_11_elems *elems,
++				 bool beacon)
  {
 -	struct cfg80211_bss *cbss =
 -		container_of((void *)bss, struct cfg80211_bss, priv);
@@ -1509,36 +1510,38 @@
 +	struct cfg80211_chan_def new_vht_chandef = {};
 +	const struct ieee80211_sec_chan_offs_ie *sec_chan_offs;
 +	const struct ieee80211_wide_bw_chansw_ie *wide_bw_chansw_ie;
++	const struct ieee80211_ht_operation *ht_oper;
 +	int secondary_channel_offset = -1;
  
  	ASSERT_MGD_MTX(ifmgd);
  
 -	if (!ifmgd->associated)
 +	if (!cbss)
++		return;
++
++	if (local->scanning)
  		return;
  
 -	if (sdata->local->scanning)
-+	if (local->scanning)
++	/* disregard subsequent announcements if we are already processing */
++	if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
  		return;
  
 -	/* Disregard subsequent beacons if we are already running a timer
 -	   processing a CSA */
--
-+	/* disregard subsequent announcements if we are already processing */
- 	if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
- 		return;
- 
--	new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
--	if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED) {
 +	sec_chan_offs = elems->sec_chan_offs;
 +	wide_bw_chansw_ie = elems->wide_bw_chansw_ie;
++	ht_oper = elems->ht_operation;
 +
 +	if (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
 +			    IEEE80211_STA_DISABLE_40MHZ)) {
 +		sec_chan_offs = NULL;
 +		wide_bw_chansw_ie = NULL;
++		/* only used for bandwidth here */
++		ht_oper = NULL;
 +	}
-+
+ 
+-	if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
 +	if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
 +		wide_bw_chansw_ie = NULL;
 +
@@ -1562,11 +1565,13 @@
 +		mode = elems->ch_switch_ie->mode;
 +	} else {
 +		/* nothing here we understand */
-+		return;
+ 		return;
 +	}
 +
 +	bss = (void *)cbss->priv;
-+
+ 
+-	new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
+-	if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED) {
 +	new_freq = ieee80211_channel_to_frequency(new_chan_no, new_band);
 +	new_chan = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
 +	if (!new_chan || new_chan->flags & IEEE80211_CHAN_DISABLED) {
@@ -1579,10 +1584,20 @@
 +		return;
 +	}
 +
-+	if (sec_chan_offs) {
++	if (!beacon && sec_chan_offs) {
 +		secondary_channel_offset = sec_chan_offs->sec_chan_offs;
++	} else if (beacon && ht_oper) {
++		secondary_channel_offset =
++			ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET;
 +	} else if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
-+		/* if HT is enabled and the IE not present, it's still HT */
++		/*
++		 * If it's not a beacon, HT is enabled and the IE not present,
++		 * it's 20 MHz, 802.11-2012 8.5.2.6:
++		 *	This element [the Secondary Channel Offset Element] is
++		 *	present when switching to a 40 MHz channel. It may be
++		 *	present when switching to a 20 MHz channel (in which
++		 *	case the secondary channel offset is set to SCN).
++		 */
 +		secondary_channel_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE;
 +	}
 +
@@ -1692,7 +1707,7 @@
  		return;
  	}
  	chanctx = container_of(rcu_access_pointer(sdata->vif.chanctx_conf),
-@@ -1111,40 +1207,39 @@ ieee80211_sta_process_chanswitch(struct 
+@@ -1111,40 +1222,39 @@ ieee80211_sta_process_chanswitch(struct 
  	if (chanctx->refcount > 1) {
  		sdata_info(sdata,
  			   "channel switch with multiple interfaces on the same channel, disconnecting\n");
@@ -1747,7 +1762,7 @@
  }
  
  static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
-@@ -2120,7 +2215,6 @@ void ieee80211_beacon_loss(struct ieee80
+@@ -2120,7 +2230,6 @@ void ieee80211_beacon_loss(struct ieee80
  
  	trace_api_beacon_loss(sdata);
  
@@ -1755,7 +1770,7 @@
  	sdata->u.mgd.connection_loss = false;
  	ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
  }
-@@ -2170,7 +2264,7 @@ static void ieee80211_auth_challenge(str
+@@ -2170,7 +2279,7 @@ static void ieee80211_auth_challenge(str
  	u32 tx_flags = 0;
  
  	pos = mgmt->u.auth.variable;
@@ -1764,7 +1779,7 @@
  	if (!elems.challenge)
  		return;
  	auth_data->expected_transaction = 4;
-@@ -2435,7 +2529,7 @@ static bool ieee80211_assoc_success(stru
+@@ -2435,7 +2544,7 @@ static bool ieee80211_assoc_success(stru
  	}
  
  	pos = mgmt->u.assoc_resp.variable;
@@ -1773,7 +1788,7 @@
  
  	if (!elems.supp_rates) {
  		sdata_info(sdata, "no SuppRates element in AssocResp\n");
-@@ -2604,7 +2698,7 @@ ieee80211_rx_mgmt_assoc_resp(struct ieee
+@@ -2604,7 +2713,7 @@ ieee80211_rx_mgmt_assoc_resp(struct ieee
  		   capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
  
  	pos = mgmt->u.assoc_resp.variable;
@@ -1782,7 +1797,7 @@
  
  	if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
  	    elems.timeout_int &&
-@@ -2659,6 +2753,8 @@ static void ieee80211_rx_bss_info(struct
+@@ -2659,6 +2768,8 @@ static void ieee80211_rx_bss_info(struct
  	struct ieee80211_channel *channel;
  	bool need_ps = false;
  
@@ -1791,7 +1806,7 @@
  	if ((sdata->u.mgd.associated &&
  	     ether_addr_equal(mgmt->bssid, sdata->u.mgd.associated->bssid)) ||
  	    (sdata->u.mgd.assoc_data &&
-@@ -2689,7 +2785,8 @@ static void ieee80211_rx_bss_info(struct
+@@ -2689,7 +2800,8 @@ static void ieee80211_rx_bss_info(struct
  	if (bss)
  		ieee80211_rx_bss_put(local, bss);
  
@@ -1801,7 +1816,7 @@
  		return;
  
  	if (need_ps) {
-@@ -2698,10 +2795,8 @@ static void ieee80211_rx_bss_info(struct
+@@ -2698,10 +2810,9 @@ static void ieee80211_rx_bss_info(struct
  		mutex_unlock(&local->iflist_mtx);
  	}
  
@@ -1809,12 +1824,13 @@
 -	    memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid, ETH_ALEN) == 0)
 -		ieee80211_sta_process_chanswitch(sdata, elems->ch_switch_ie,
 -						 bss, rx_status->mactime);
-+	ieee80211_sta_process_chanswitch(sdata, rx_status->mactime, elems);
++	ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
++					 elems, true);
 +
  }
  
  
-@@ -2726,7 +2821,7 @@ static void ieee80211_rx_mgmt_probe_resp
+@@ -2726,7 +2837,7 @@ static void ieee80211_rx_mgmt_probe_resp
  		return;
  
  	ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
@@ -1823,7 +1839,7 @@
  
  	ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
  
-@@ -2809,7 +2904,7 @@ ieee80211_rx_mgmt_beacon(struct ieee8021
+@@ -2809,7 +2920,7 @@ ieee80211_rx_mgmt_beacon(struct ieee8021
  	if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
  	    ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
  		ieee802_11_parse_elems(mgmt->u.beacon.variable,
@@ -1832,7 +1848,7 @@
  
  		ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
  		ifmgd->assoc_data->have_beacon = true;
-@@ -2919,7 +3014,7 @@ ieee80211_rx_mgmt_beacon(struct ieee8021
+@@ -2919,7 +3030,7 @@ ieee80211_rx_mgmt_beacon(struct ieee8021
  
  	ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
  	ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
@@ -1841,7 +1857,7 @@
  					  care_about_ies, ncrc);
  
  	if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
-@@ -3066,6 +3161,8 @@ void ieee80211_sta_rx_queued_mgmt(struct
+@@ -3066,6 +3177,8 @@ void ieee80211_sta_rx_queued_mgmt(struct
  	enum rx_mgmt_action rma = RX_MGMT_NONE;
  	u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
  	u16 fc;
@@ -1850,7 +1866,7 @@
  
  	rx_status = (struct ieee80211_rx_status *) skb->cb;
  	mgmt = (struct ieee80211_mgmt *) skb->data;
-@@ -3095,14 +3192,48 @@ void ieee80211_sta_rx_queued_mgmt(struct
+@@ -3095,14 +3208,48 @@ void ieee80211_sta_rx_queued_mgmt(struct
  		rma = ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, &bss);
  		break;
  	case IEEE80211_STYPE_ACTION:
@@ -1877,7 +1893,7 @@
 -					rx_status->mactime);
 -			break;
 +							 rx_status->mactime,
-+							 &elems);
++							 &elems, false);
 +		} else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
 +			ies_len = skb->len -
 +				  offsetof(struct ieee80211_mgmt,
@@ -1899,7 +1915,7 @@
 +
 +			ieee80211_sta_process_chanswitch(sdata,
 +							 rx_status->mactime,
-+							 &elems);
++							 &elems, false);
  		}
 +		break;
  	}