iwlwifi: mvm: change iwl_mvm_get_key_sta_id() to return the station

The code in iwl_mvm_update_tkip_key() is now pretty much duplicated
with the code in iwl_mvm_get_key_sta_id() doing the station ID lookup
again after it was already done. Change iwl_mvm_get_key_sta_id() to
iwl_mvm_get_key_sta(), returning the mvm_sta pointer, to allow that
duplicate code to be removed.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/sta.c b/drivers/net/wireless/intel/iwlwifi/mvm/sta.c
index bfa4699..2c9675b 100644 (file)
--- a/drivers/net/wireless/intel/iwlwifi/mvm/sta.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/sta.c
@@ -1228,17 +1228,14 @@ static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm)
        return max_offs;
 }
 
-static u8 iwl_mvm_get_key_sta_id(struct iwl_mvm *mvm,
-                                struct ieee80211_vif *vif,
-                                struct ieee80211_sta *sta)
+static struct iwl_mvm_sta *iwl_mvm_get_key_sta(struct iwl_mvm *mvm,
+                                              struct ieee80211_vif *vif,
+                                              struct ieee80211_sta *sta)
 {
        struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 
-       if (sta) {
-               struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
-
-               return mvm_sta->sta_id;
-       }
+       if (sta)
+               return iwl_mvm_sta_from_mac80211(sta);
 
        /*
         * The device expects GTKs for station interfaces to be
@@ -1257,12 +1254,12 @@ static u8 iwl_mvm_get_key_sta_id(struct iwl_mvm *mvm,
                 * be the AP ID, and no station was passed by mac80211.
                 */
                if (IS_ERR_OR_NULL(sta))
-                       return IWL_MVM_STATION_COUNT;
+                       return NULL;
 
-               return sta_id;
+               return iwl_mvm_sta_from_mac80211(sta);
        }
 
-       return IWL_MVM_STATION_COUNT;
+       return NULL;
 }
 
 static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm,
@@ -1479,6 +1476,7 @@ int iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
                        u8 key_offset)
 {
        bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
+       struct iwl_mvm_sta *mvm_sta;
        u8 sta_id;
        int ret;
        static const u8 __maybe_unused zero_addr[ETH_ALEN] = {0};
@@ -1486,11 +1484,12 @@ int iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
        lockdep_assert_held(&mvm->mutex);
 
        /* Get the station id from the mvm local station table */
-       sta_id = iwl_mvm_get_key_sta_id(mvm, vif, sta);
-       if (sta_id == IWL_MVM_STATION_COUNT) {
-               IWL_ERR(mvm, "Failed to find station id\n");
+       mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
+       if (!mvm_sta) {
+               IWL_ERR(mvm, "Failed to find station\n");
                return -EINVAL;
        }
+       sta_id = mvm_sta->sta_id;
 
        if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC) {
                ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, false);
@@ -1566,13 +1565,14 @@ int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm,
                           struct ieee80211_key_conf *keyconf)
 {
        bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
-       u8 sta_id;
+       struct iwl_mvm_sta *mvm_sta;
+       u8 sta_id = IWL_MVM_STATION_COUNT;
        int ret, i;
 
        lockdep_assert_held(&mvm->mutex);
 
-       /* Get the station id from the mvm local station table */
-       sta_id = iwl_mvm_get_key_sta_id(mvm, vif, sta);
+       /* Get the station from the mvm local station table */
+       mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
 
        IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n",
                      keyconf->keyidx, sta_id);
@@ -1593,11 +1593,13 @@ int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm,
        }
        mvm->fw_key_deleted[keyconf->hw_key_idx] = 0;
 
-       if (sta_id == IWL_MVM_STATION_COUNT) {
+       if (!mvm_sta) {
                IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n");
                return 0;
        }
 
+       sta_id = mvm_sta->sta_id;
+
        ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
        if (ret)
                return ret;
@@ -1617,24 +1619,13 @@ void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm,
                             u16 *phase1key)
 {
        struct iwl_mvm_sta *mvm_sta;
-       u8 sta_id;
        bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
 
        rcu_read_lock();
 
-       sta_id = iwl_mvm_get_key_sta_id(mvm, vif, sta);
-       if (WARN_ON_ONCE(sta_id == IWL_MVM_STATION_COUNT))
+       mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
+       if (WARN_ON_ONCE(!mvm_sta))
                goto unlock;
-
-       if (!sta) {
-               sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
-               if (WARN_ON(IS_ERR_OR_NULL(sta))) {
-                       rcu_read_unlock();
-                       return;
-               }
-       }
-
-       mvm_sta = iwl_mvm_sta_from_mac80211(sta);
        iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
                             iv32, phase1key, CMD_ASYNC, keyconf->hw_key_idx);