iwlwifi: mvm: Allow iwl_mvm_mac_mgd_prepare_tx() when associated

The FW does not allocate quota air time for the binding of a station
MAC before iwlmvm indicates that it is associated. Currently iwlmvm
indicates that the MAC is associated only after hearing a beacon from
the AP. In case a deauthentication frame is sent before the MAC is
associated, the frame might not be sent as the corresponding binding
is not scheduled.

To handle such cases, set IEEE80211_HW_DEAUTH_NEED_MGD_TX_PREP in the
HW flags, requesting mac80211 to call the mgd_prepare_tx() callback
before transmitting a deauthentication frame if associated but no
beacon was heard from the AP.

In addition, do not warn in iwl_mvm_mac_mgd_prepare_tx() when already
associated as now the callback can be called also when associated.

Signed-off-by: Ilan Peer <ilan.peer@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>

1 files changed, 1 insertions, 3 deletions

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c b/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
index 82dc9dec4160..51b30424575b 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
@@ -421,6 +421,7 @@ int iwl_mvm_mac_setup_register(struct iwl_mvm *mvm)
         ieee80211_hw_set(hw, SUPPORTS_CLONED_SKBS);
         ieee80211_hw_set(hw, SUPPORTS_AMSDU_IN_AMPDU);
         ieee80211_hw_set(hw, NEEDS_UNIQUE_STA_ADDR);
+        ieee80211_hw_set(hw, DEAUTH_NEED_MGD_TX_PREP);
 
         if (iwl_mvm_has_tlc_offload(mvm)) {
                 ieee80211_hw_set(hw, TX_AMPDU_SETUP_IN_HW);
@@ -2815,9 +2816,6 @@ static void iwl_mvm_mac_mgd_prepare_tx(struct ieee80211_hw *hw,
         u32 duration = IWL_MVM_TE_SESSION_PROTECTION_MAX_TIME_MS;
         u32 min_duration = IWL_MVM_TE_SESSION_PROTECTION_MIN_TIME_MS;
 
-        if (WARN_ON_ONCE(vif->bss_conf.assoc))
-                return;
-
         /*
          * iwl_mvm_protect_session() reads directly from the device
          * (the system time), so make sure it is available.