recipes-wifi/linux-mt76/files/patches-3.x/0127-mtk-mt76-mt7996-do-not-remove-bss_info-and-starec-wh.patch

From 81e8f959269eed83f6611ea65f7e1fc22bb4d934 Mon Sep 17 00:00:00 2001
From: Peter Chiu <chui-hao.chiu@mediatek.com>
Date: Wed, 22 May 2024 18:22:51 +0800
Subject: [PATCH 127/193] mtk: mt76: mt7996: do not remove bss_info and starec
 when assign_vif_chanctx

When STA interface re-connect from rootAP, it would unsign/assign vif
chanctx for both AP and station interface. If remove/re-allocate
bss_info and starec for AP interface, the WTBL and GTK of AP would
be cleared. But the hostapd does not remove interface so it would not
set key again.

Change-Id: Icdd599f163268e7f313589f0ca35a2f220e2b783
Signed-off-by: Peter Chiu <chui-hao.chiu@mediatek.com>
---
 mt7996/main.c | 17 +++++++++++++----
 1 file changed, 13 insertions(+), 4 deletions(-)

diff --git a/mt7996/main.c b/mt7996/main.c
index 161b5cb..5a6165b 100644
--- a/mt7996/main.c
+++ b/mt7996/main.c
@@ -338,6 +338,9 @@ static int mt7996_add_bss_conf(struct mt7996_phy *phy,
 	u8 link_id = conf->link_id;
 	int idx, ret;
 
+	if (rcu_access_pointer(mvif->link[link_id]))
+		return 0;
+
 	if (conf != &vif->bss_conf) {
 		mconf = kzalloc(sizeof(*mconf), GFP_KERNEL);
 		if (!mconf)
@@ -2519,10 +2522,16 @@ mt7996_assign_vif_chanctx(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
 
 	mutex_lock(&phy->dev->mt76.mutex);
 
-	/* remove first */
-	if (rcu_access_pointer(mvif->link[link_id]))
-		mt7996_remove_bss_conf(vif, link_conf,
-				       mconf_dereference_protected(mvif, link_id));
+	mconf = mconf_dereference_protected(mvif, link_id);
+
+	/* Remove bss conf when change non-MLO interface to MLO interface */
+	if (ieee80211_vif_is_mld(vif) && mconf == &mvif->deflink)
+		mt7996_remove_bss_conf(vif, link_conf, mconf);
+	else if (mconf && phy != mconf->phy)
+		dev_err(phy->dev->mt76.dev,
+			"%s: error: change link[%d] from phy%d to phy%d",
+			__func__, link_id, mconf->phy->mt76->band_idx,
+			phy->mt76->band_idx);
 
 	ret = mt7996_add_bss_conf(phy, vif, link_conf);
 	if (ret) {
-- 
2.45.2