Re: [PATCH ath-next] wifi: ath12k: Handle DP_RX_DECAP_TYPE_8023 type in Rx path

[Rameshkumar Sundaram <rameshkumar.sundaram@oss.qualcomm.com>]

On 4/18/2026 10:06 PM, Tamizh Chelvam Raja wrote:
> The driver does not currently set any rx_flag for frames received with
> decap type DP_RX_DECAP_TYPE_8023. When the hardware reports
> LLC-encapsulated packets whose length field is below 0x0600, the MSDU_END
> descriptor may indicate decap type DP_RX_DECAP_TYPE_8023.
> 
> These frames are effectively equivalent to Ethernet-II (DIX) packets,
> similar to those decoded as DP_RX_DECAP_TYPE_ETHERNET2_DIX. If the
> driver does not set RX_FLAG_8023 for these frames, mac80211 will
> misinterpret them as 802.11 frames. This causes valid frames such as
> Bridge Protocol Data Units (BPDUs) to be dropped. BPDUs are exchanged
> between switches to maintain and manage network topology, and must
> be treated as Ethernet frames.
> 
> Set RX_FLAG_8023 for decap type DP_RX_DECAP_TYPE_8023 in
> ath12k_dp_rx_h_undecap() to ensure mac80211 handles these frames
> correctly. Also add multicast packet handling support for the
> DP_RX_DECAP_TYPE_8023 decap type.
> 
> Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.6-01243-QCAHKSWPL_SILICONZ-1
> 
> Signed-off-by: Tamizh Chelvam Raja <tamizh.raja@oss.qualcomm.com>
Reviewed-by: Rameshkumar Sundaram <rameshkumar.sundaram@oss.qualcomm.com>