iwlwifi: mvm: fix L2P BA ressources leak

We didn't release the Rx AMPDU ressources properly.
This bug led to firmware assert after 16 BA sessions.

Cc: <stable@vger.kernel.org> [3.9+]
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>

diff --git a/drivers/net/wireless/iwlwifi/mvm/sta.c b/drivers/net/wireless/iwlwifi/mvm/sta.c
index 62fe5209093bf7637cb024b2c81dfd301cfd4649..b6ab0766ea993fe3540854c1a6adf23110221405 100644 (file)
--- a/drivers/net/wireless/iwlwifi/mvm/sta.c
+++ b/drivers/net/wireless/iwlwifi/mvm/sta.c
@@ -621,8 +621,12 @@ int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
        cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
        cmd.sta_id = mvm_sta->sta_id;
        cmd.add_modify = STA_MODE_MODIFY;
-       cmd.add_immediate_ba_tid = (u8) tid;
-       cmd.add_immediate_ba_ssn = cpu_to_le16(ssn);
+       if (start) {
+               cmd.add_immediate_ba_tid = (u8) tid;
+               cmd.add_immediate_ba_ssn = cpu_to_le16(ssn);
+       } else {
+               cmd.remove_immediate_ba_tid = (u8) tid;
+       }
        cmd.modify_mask = start ? STA_MODIFY_ADD_BA_TID :
                                  STA_MODIFY_REMOVE_BA_TID;