[PATCH ath-next] wifi: ath12k: Prevent multicast duplication for dynamic VLAN

[Muna Sinada]

Since dynamic VLAN traffic is software encrypted and encapsulated,
mac80211 handles the duplication on each link for MLO dynamic VLAN
multicast.

Currently in mac Tx op, all multicast frames are duplicated and are
assigned a mcbc_gsn. This is causing dynamic VLAN multicast traffic
to be dropped in HW.

Prevent dynamic VLAN multicast traffic from being duplicated again in
the driver. Check if incoming packet is a dynamic VLAN packet and
avoid defaulting to multicast conditional.

Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.3.1-00173-QCAHKSWPL_SILICONZ-1
Tested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.0.c5-00481-QCAHMTSWPL_V1.0_V2.0_SILICONZ-3

Signed-off-by: Muna Sinada <muna.sinada at oss.qualcomm.com>
---
 drivers/net/wireless/ath/ath12k/mac.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/drivers/net/wireless/ath/ath12k/mac.c b/drivers/net/wireless/ath/ath12k/mac.c
index dfa05f0ee6c9..a7b8a7d2637a 100644
--- a/drivers/net/wireless/ath/ath12k/mac.c
+++ b/drivers/net/wireless/ath/ath12k/mac.c
@@ -7337,6 +7337,7 @@ static void ath12k_mac_op_tx(struct ieee80211_hw *hw,
 	struct ath12k_peer *peer;
 	unsigned long links_map;
 	bool is_mcast = false;
+	bool is_dvlan = false;
 	struct ethhdr *eth;
 	bool is_prb_rsp;
 	u16 mcbc_gsn;
@@ -7397,7 +7398,14 @@ static void ath12k_mac_op_tx(struct ieee80211_hw *hw,
 	if (vif->type == NL80211_IFTYPE_AP && vif->p2p)
 		ath12k_mac_add_p2p_noa_ie(ar, vif, skb, is_prb_rsp);
 
-	if (!vif->valid_links || !is_mcast ||
+	/* Checking if it is a DVLAN frame */
+	if (!test_bit(ATH12K_FLAG_HW_CRYPTO_DISABLED, &ar->ab->dev_flags) &&
+	    !(skb_cb->flags & ATH12K_SKB_HW_80211_ENCAP) &&
+	    !(skb_cb->flags & ATH12K_SKB_CIPHER_SET) &&
+	    ieee80211_has_protected(hdr->frame_control))
+		is_dvlan = true;
+
+	if (!vif->valid_links || !is_mcast || is_dvlan ||
 	    test_bit(ATH12K_FLAG_RAW_MODE, &ar->ab->dev_flags)) {
 		ret = ath12k_dp_tx(ar, arvif, skb, false, 0);
 		if (unlikely(ret)) {

base-commit: 0e28ee106c46c95eb322833c17c33e3c231ccd0d
-- 
2.34.1