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iwlwifi: mvm: work around HW issue with AMSDU de-aggregation

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

Signed-off-by: Sara Sharon <sara.sharon@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
This commit is contained in:
Sara Sharon 2017-01-31 14:36:10 +02:00 committed by Luca Coelho
parent bbf049d92a
commit a56cb4f0d8
1 changed files with 7 additions and 0 deletions
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7
drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c
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@ -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);