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Commit a56cb4f0 authored by Sara Sharon's avatar Sara Sharon Committed by Luca Coelho
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iwlwifi: mvm: work around HW issue with AMSDU de-aggregation 



Seems like HW is reversing addr3 in the MAC header of de-aggregated
AMSDU. Reverse it back.

Signed-off-by: default avatarSara Sharon <sara.sharon@intel.com>
Signed-off-by: default avatarLuca Coelho <luciano.coelho@intel.com>
parent bbf049d9

drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c

+7 −0
Original line number Diff line number Diff line
@@ -911,12 +911,19 @@ void iwl_mvm_rx_mpdu_mq(struct iwl_mvm *mvm, struct napi_struct *napi, 
		 * Our hardware de-aggregates AMSDUs but copies the mac header

		 * as it to the de-aggregated MPDUs. We need to turn off the

		 * AMSDU bit in the QoS control ourselves.

		 * In addition, HW reverses addr3 - reverse it back.

		 */

		if ((desc->mac_flags2 & IWL_RX_MPDU_MFLG2_AMSDU) &&

		    !WARN_ON(!ieee80211_is_data_qos(hdr->frame_control))) {

			int i;

			u8 *qc = ieee80211_get_qos_ctl(hdr);

			u8 mac_addr[ETH_ALEN];



			*qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT;



			for (i = 0; i < ETH_ALEN; i++)

				mac_addr[i] = hdr->addr3[ETH_ALEN - i - 1];

			ether_addr_copy(hdr->addr3, mac_addr);

		}

		if (baid != IWL_RX_REORDER_DATA_INVALID_BAID)

			iwl_mvm_agg_rx_received(mvm, baid);