iwlwifi: mvm: fix A-MPDU reference assignment

The current code assigns the reference, and then goes to increment
it if the toggle bit has changed. That way, we get

Toggle  0  0  0  0  1  1  1  1
ID      1  1  1  1  1  2  2  2

Fix that by assigning the post-toggle ID to get

Toggle  0  0  0  0  1  1  1  1
ID      1  1  1  1  2  2  2  2

Reported-by: Danny Alexander <danny.alexander@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Fixes: fbe4112791b8 ("iwlwifi: mvm: update mpdu metadata API")
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 9342f61..120e3f2 100644 (file)
--- a/drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c
@@ -1438,12 +1438,12 @@ void iwl_mvm_rx_mpdu_mq(struct iwl_mvm *mvm, struct napi_struct *napi,
                bool toggle_bit = phy_info & IWL_RX_MPDU_PHY_AMPDU_TOGGLE;
 
                rx_status->flag |= RX_FLAG_AMPDU_DETAILS;
-               rx_status->ampdu_reference = mvm->ampdu_ref;
                /* toggle is switched whenever new aggregation starts */
                if (toggle_bit != mvm->ampdu_toggle) {
                        mvm->ampdu_ref++;
                        mvm->ampdu_toggle = toggle_bit;
                }
+               rx_status->ampdu_reference = mvm->ampdu_ref;
        }
 
        rcu_read_lock();