wifi: ath12k: correctly handle mcast packets for clients

commit 4541b0c upstream.

Currently, RX is_mcbc bit is set for packets sent from client as
destination address (DA) is multicast/broadcast address, but packets
are actually unicast as receiver address (RA) is not multicast address.
Hence, packets are not handled properly due to this is_mcbc bit.

Therefore, reset the is_mcbc bit if interface type is AP.

Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.4.1-00199-QCAHKSWPL_SILICONZ-1

Signed-off-by: Sarika Sharma <quic_sarishar@quicinc.com>
Reviewed-by: Vasanthakumar Thiagarajan <vasanthakumar.thiagarajan@oss.qualcomm.com>
Link: https://patch.msgid.link/20250411061523.859387-3-quic_sarishar@quicinc.com
Signed-off-by: Jeff Johnson <jeff.johnson@oss.qualcomm.com>
[ Adjust context ]
Signed-off-by: Oliver Sedlbauer <os@dev.tdt.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Author: Sarika Sharma

drivers/net/wireless/ath/ath12k/dp_rx.c

@@ -2214,6 +2214,11 @@ static void ath12k_dp_rx_h_mpdu(struct ath12k *ar,
 	spin_lock_bh(&ar->ab->base_lock);
 	peer = ath12k_dp_rx_h_find_peer(ar->ab, msdu);
 	if (peer) {
+		/* resetting mcbc bit because mcbc packets are unicast
+		 * packets only for AP as STA sends unicast packets.
+		 */
+		rxcb->is_mcbc = rxcb->is_mcbc && !peer->ucast_ra_only;
+
 		if (rxcb->is_mcbc)
 			enctype = peer->sec_type_grp;
 		else

drivers/net/wireless/ath/ath12k/peer.c

@@ -331,6 +331,9 @@ int ath12k_peer_create(struct ath12k *ar, struct ath12k_vif *arvif,
 		arvif->ast_idx = peer->hw_peer_id;
 	}
 
+	if (arvif->vif->type == NL80211_IFTYPE_AP)
+		peer->ucast_ra_only = true;
+
 	peer->sec_type = HAL_ENCRYPT_TYPE_OPEN;
 	peer->sec_type_grp = HAL_ENCRYPT_TYPE_OPEN;
 

drivers/net/wireless/ath/ath12k/peer.h

@@ -47,6 +47,8 @@ struct ath12k_peer {
 
 	/* protected by ab->data_lock */
 	bool dp_setup_done;
+
+	bool ucast_ra_only;
 };
 
 void ath12k_peer_unmap_event(struct ath12k_base *ab, u16 peer_id);