wifi: mac80211: add support for mld in ieee80211_chswitch_done

This allows to finalize the CSA per link.
In case the switch didn't work, tear down the MLD connection.
Also pass the ieee80211_bss_conf to post_channel_switch to let the
driver know which link completed the switch.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Link: https://lore.kernel.org/r/20230828130311.3d3eacc88436.Ic2d14e2285aa1646216a56806cfd4a8d0054437c@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

7 files changed, 15 insertions, 12 deletions

diff --git a/drivers/net/wireless/intel/iwlegacy/4965-mac.c b/drivers/net/wireless/intel/iwlegacy/4965-mac.c
index 0a4aa3c678c1..69276266ce6f 100644
--- a/drivers/net/wireless/intel/iwlegacy/4965-mac.c
+++ b/drivers/net/wireless/intel/iwlegacy/4965-mac.c
@@ -6122,7 +6122,7 @@ il4965_mac_channel_switch(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
 	if (il->ops->set_channel_switch(il, ch_switch)) {
 		clear_bit(S_CHANNEL_SWITCH_PENDING, &il->status);
 		il->switch_channel = 0;
-		ieee80211_chswitch_done(il->vif, false);
+		ieee80211_chswitch_done(il->vif, false, 0);
 	}
 
 out:
diff --git a/drivers/net/wireless/intel/iwlegacy/common.c b/drivers/net/wireless/intel/iwlegacy/common.c
index 96002121bb8b..054fef680aba 100644
--- a/drivers/net/wireless/intel/iwlegacy/common.c
+++ b/drivers/net/wireless/intel/iwlegacy/common.c
@@ -4090,7 +4090,7 @@ il_chswitch_done(struct il_priv *il, bool is_success)
 		return;
 
 	if (test_and_clear_bit(S_CHANNEL_SWITCH_PENDING, &il->status))
-		ieee80211_chswitch_done(il->vif, is_success);
+		ieee80211_chswitch_done(il->vif, is_success, 0);
 }
 EXPORT_SYMBOL(il_chswitch_done);
 
diff --git a/drivers/net/wireless/intel/iwlwifi/dvm/mac80211.c b/drivers/net/wireless/intel/iwlwifi/dvm/mac80211.c
index b1939ff275b5..5f3d5b15f727 100644
--- a/drivers/net/wireless/intel/iwlwifi/dvm/mac80211.c
+++ b/drivers/net/wireless/intel/iwlwifi/dvm/mac80211.c
@@ -2,7 +2,7 @@
 /******************************************************************************
  *
  * Copyright(c) 2003 - 2014 Intel Corporation. All rights reserved.
- * Copyright (C) 2018 - 2019, 2022 Intel Corporation
+ * Copyright(C) 2018 - 2019, 2022 - 2023 Intel Corporation
  *
  * Portions of this file are derived from the ipw3945 project, as well
  * as portions of the ieee80211 subsystem header files.
@@ -1001,7 +1001,7 @@ static void iwlagn_mac_channel_switch(struct ieee80211_hw *hw,
 	if (priv->lib->set_channel_switch(priv, ch_switch)) {
 		clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
 		priv->switch_channel = 0;
-		ieee80211_chswitch_done(ctx->vif, false);
+		ieee80211_chswitch_done(ctx->vif, false, 0);
 	}
 
 out:
@@ -1024,7 +1024,7 @@ void iwl_chswitch_done(struct iwl_priv *priv, bool is_success)
 		return;
 
 	if (ctx->vif)
-		ieee80211_chswitch_done(ctx->vif, is_success);
+		ieee80211_chswitch_done(ctx->vif, is_success, 0);
 }
 
 static void iwlagn_configure_filter(struct ieee80211_hw *hw,
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mac-ctxt.c b/drivers/net/wireless/intel/iwlwifi/mvm/mac-ctxt.c
index 7369a45f7f2b..b28d998c65c5 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/mac-ctxt.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/mac-ctxt.c
@@ -1839,7 +1839,7 @@ void iwl_mvm_channel_switch_start_notif(struct iwl_mvm *mvm,
 
 		iwl_mvm_csa_client_absent(mvm, vif);
 		cancel_delayed_work(&mvmvif->csa_work);
-		ieee80211_chswitch_done(vif, true);
+		ieee80211_chswitch_done(vif, true, 0);
 		break;
 	default:
 		/* should never happen */
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c b/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
index 5918c1f2b10c..921f72dcddac 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
@@ -1370,7 +1370,8 @@ int iwl_mvm_set_tx_power(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 }
 
 int iwl_mvm_post_channel_switch(struct ieee80211_hw *hw,
-				struct ieee80211_vif *vif)
+				struct ieee80211_vif *vif,
+				struct ieee80211_bss_conf *link_conf)
 {
 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
@@ -1452,7 +1453,8 @@ void iwl_mvm_abort_channel_switch(struct ieee80211_hw *hw,
 	mvmvif->csa_failed = true;
 	mutex_unlock(&mvm->mutex);
 
-	iwl_mvm_post_channel_switch(hw, vif);
+	/* If we're here, we can't support MLD */
+	iwl_mvm_post_channel_switch(hw, vif, &vif->bss_conf);
 }
 
 void iwl_mvm_channel_switch_disconnect_wk(struct work_struct *wk)
@@ -1464,7 +1466,7 @@ void iwl_mvm_channel_switch_disconnect_wk(struct work_struct *wk)
 	vif = container_of((void *)mvmvif, struct ieee80211_vif, drv_priv);
 
 	/* Trigger disconnect (should clear the CSA state) */
-	ieee80211_chswitch_done(vif, false);
+	ieee80211_chswitch_done(vif, false, 0);
 }
 
 static u8
@@ -5535,7 +5537,7 @@ void iwl_mvm_channel_switch_rx_beacon(struct ieee80211_hw *hw,
 		if (mvmvif->csa_misbehave) {
 			/* Second time, give up on this AP*/
 			iwl_mvm_abort_channel_switch(hw, vif);
-			ieee80211_chswitch_done(vif, false);
+			ieee80211_chswitch_done(vif, false, 0);
 			mvmvif->csa_misbehave = false;
 			return;
 		}
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h b/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h
index b18c91c5dd5d..dda13f4351c3 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h
@@ -2427,7 +2427,8 @@ static inline u8 iwl_mvm_phy_band_from_nl80211(enum nl80211_band band)
 /* Channel Switch */
 void iwl_mvm_channel_switch_disconnect_wk(struct work_struct *wk);
 int iwl_mvm_post_channel_switch(struct ieee80211_hw *hw,
-				struct ieee80211_vif *vif);
+				struct ieee80211_vif *vif,
+				struct ieee80211_bss_conf *link);
 
 /* Channel Context */
 /**
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/time-event.c b/drivers/net/wireless/intel/iwlwifi/mvm/time-event.c
index 5f0e7144a951..e1f6cea649c3 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/time-event.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/time-event.c
@@ -223,7 +223,7 @@ iwl_mvm_te_handle_notify_csa(struct iwl_mvm *mvm,
 		}
 		iwl_mvm_csa_client_absent(mvm, te_data->vif);
 		cancel_delayed_work(&mvmvif->csa_work);
-		ieee80211_chswitch_done(te_data->vif, true);
+		ieee80211_chswitch_done(te_data->vif, true, 0);
 		break;
 	default:
 		/* should never happen */