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mac80211: ath12k: backport correctly handle mcast packets

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Backport upstream commit that fixes handling of multicast packets.
Without this patch, ARP resolution fails, and connectivity from a
station to an AP does not work reliably until traffic is initiated
by the AP.

Signed-off-by: Oliver Sedlbauer <os@dev.tdt.de>
Link: https://github.com/openwrt/openwrt/pull/21088
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
This commit is contained in:
Oliver Sedlbauer 2025-12-08 10:29:33 +01:00 • committed by Hauke Mehrtens
parent 6a92e68c51
commit 8498118893
1 changed files with 66 additions and 0 deletions
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66
package/kernel/mac80211/patches/ath12k/002-wifi-ath12k-correctly-handle-mcast-packets-for-clien.patch Normal file
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@ -0,0 +1,66 @@
From a1eb56723b3203d366d2293a368b8bc8ef8894cd Mon Sep 17 00:00:00 2001
From: Sarika Sharma <quic_sarishar@quicinc.com>
Date: Fri, 11 Apr 2025 11:45:23 +0530
Subject: [PATCH] wifi: ath12k: correctly handle mcast packets for clients
commit 4541b0c8c3c1b85564971d497224e57cf8076a02 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>
---
drivers/net/wireless/ath/ath12k/dp_rx.c | 5 +++++
drivers/net/wireless/ath/ath12k/peer.c | 3 +++
drivers/net/wireless/ath/ath12k/peer.h | 2 ++
3 files changed, 10 insertions(+)
--- a/drivers/net/wireless/ath/ath12k/dp_rx.c
+++ b/drivers/net/wireless/ath/ath12k/dp_rx.c
@@ -2214,6 +2214,11 @@ static void ath12k_dp_rx_h_mpdu(struct a
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
--- a/drivers/net/wireless/ath/ath12k/peer.c
+++ b/drivers/net/wireless/ath/ath12k/peer.c
@@ -331,6 +331,9 @@ int ath12k_peer_create(struct ath12k *ar
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;
--- a/drivers/net/wireless/ath/ath12k/peer.h
+++ b/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);