iwlwifi: mvm: support BAR in reorder buffer

On default queue we will not receive frame release notification,
but the BAR itself.
Upon receiving the BAR driver should look at the NSSN and adjust
window accordingly.

Fixes: b915c10174fb ("iwlwifi: mvm: add reorder buffer per queue")
Signed-off-by: Sara Sharon <sara.sharon@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c b/drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c
index b3866287d1c0d0257fdbbaccc4743c0e2eb4645e..0274f14e88e37d9728c92895394c7698add71a09 100644 (file)
--- a/drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c
@@ -600,9 +600,10 @@ static bool iwl_mvm_reorder(struct iwl_mvm *mvm,
 
        mvm_sta = iwl_mvm_sta_from_mac80211(sta);
 
-       /* not a data packet */
-       if (!ieee80211_is_data_qos(hdr->frame_control) ||
-           is_multicast_ether_addr(hdr->addr1))
+       /* not a data packet or a bar */
+       if (!ieee80211_is_back_req(hdr->frame_control) &&
+           (!ieee80211_is_data_qos(hdr->frame_control) ||
+            is_multicast_ether_addr(hdr->addr1)))
                return false;
 
        if (unlikely(!ieee80211_is_data_present(hdr->frame_control)))
@@ -626,6 +627,11 @@ static bool iwl_mvm_reorder(struct iwl_mvm *mvm,
 
        spin_lock_bh(&buffer->lock);
 
+       if (ieee80211_is_back_req(hdr->frame_control)) {
+               iwl_mvm_release_frames(mvm, sta, napi, buffer, nssn);
+               goto drop;
+       }
+
        /*
         * If there was a significant jump in the nssn - adjust.
         * If the SN is smaller than the NSSN it might need to first go into