[PATCH 08/25] iwlwifi: mvm: support BAR in reorder buffer

[Luca Coelho]

From: Sara Sharon <sara.sha...@intel.com>

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.sha...@intel.com>
Signed-off-by: Luca Coelho <luciano.coe...@intel.com>
---
 drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c 
b/drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c
index b386628..0274f14 100644
--- 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
-- 
2.9.3