autobuild_mac80211_release/mt7988_mt7996_mac80211_mlo/package/kernel/mac80211/patches/subsys/0054-mtk-mac80211-send-broadcast-multicast-mgmt.-via-all-.patch

From 06d3d93fc257b9f8cef083b9b84711fc9c3cee19 Mon Sep 17 00:00:00 2001
From: Michael-CY Lee <michael-cy.lee@mediatek.com>
Date: Wed, 21 Feb 2024 16:32:13 +0800
Subject: [PATCH 54/61] mtk: mac80211: send broadcast/multicast mgmt. via all
 links.

This patch makes broadcast/multicast mgmt. be sent via all links.

Signed-off-by: Michael-CY Lee <michael-cy.lee@mediatek.com>
Change-id: Id1bd06694a73cc29b3f571a57c4c864ee3742441
---
 net/mac80211/offchannel.c | 20 +++++++++++++++++++-
 1 file changed, 19 insertions(+), 1 deletion(-)

diff --git a/net/mac80211/offchannel.c b/net/mac80211/offchannel.c
index 3ed5fc5..ec1d7a1 100644
--- a/net/mac80211/offchannel.c
+++ b/net/mac80211/offchannel.c
@@ -976,7 +976,25 @@ int ieee80211_mgmt_tx(struct wiphy *wiphy, struct wireless_dev *wdev,
 	}
 
 	if (!need_offchan) {
-		ieee80211_tx_skb_tid(sdata, skb, 7, link_id);
+		unsigned long links = sdata->vif.active_links;
+		if (is_multicast_ether_addr(mgmt->da) && hweight16(links) > 1) {
+			unsigned int link;
+			struct sk_buff *dskb;
+
+			for_each_set_bit(link, &links, IEEE80211_MLD_MAX_NUM_LINKS) {
+				dskb = skb_clone(skb, GFP_ATOMIC);
+				if (dskb) {
+					ieee80211_tx_skb_tid(sdata, dskb, 7, link);
+				} else {
+					ret = -ENOMEM;
+					kfree_skb(skb);
+					goto out_unlock;
+				}
+			}
+			kfree_skb(skb);
+		} else {
+			ieee80211_tx_skb_tid(sdata, skb, 7, link_id);
+		}
 		ret = 0;
 		goto out_unlock;
 	}
-- 
2.18.0