iwlwifi: mvm: refactor the way fw_key_table is handled

Instead of keeping the fw_key_table bits set when the keys are removed
(i.e. in D3 entry or HW_RESTART flows), clear them and set them again
only when the keys have been successfully re-added.  This makes the
bitmask more closely tied to the actual firmware programming.

Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/d3.c b/drivers/net/wireless/intel/iwlwifi/mvm/d3.c
index 8cd2e67..69fd10a 100644 (file)
--- a/drivers/net/wireless/intel/iwlwifi/mvm/d3.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/d3.c
@@ -779,6 +779,9 @@ static int iwl_mvm_switch_to_d3(struct iwl_mvm *mvm)
         */
        set_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
 
+       /* the fw is reset, so all the keys are cleared */
+       memset(mvm->fw_key_table, 0, sizeof(mvm->fw_key_table));
+
        mvm->ptk_ivlen = 0;
        mvm->ptk_icvlen = 0;
        mvm->ptk_ivlen = 0;

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c b/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
index d239e97..be5703c 100644 (file)
--- a/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
@@ -984,6 +984,7 @@ static void iwl_mvm_restart_cleanup(struct iwl_mvm *mvm)
        mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
 
        iwl_mvm_reset_phy_ctxts(mvm);
+       memset(mvm->fw_key_table, 0, sizeof(mvm->fw_key_table));
        memset(mvm->sta_drained, 0, sizeof(mvm->sta_drained));
        memset(mvm->tfd_drained, 0, sizeof(mvm->tfd_drained));
        memset(&mvm->last_bt_notif, 0, sizeof(mvm->last_bt_notif));

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/sta.c b/drivers/net/wireless/intel/iwlwifi/mvm/sta.c
index 4148ebe..92edacc 100644 (file)
--- a/drivers/net/wireless/intel/iwlwifi/mvm/sta.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/sta.c
@@ -1198,8 +1198,6 @@ static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm)
        if (max_offs < 0)
                return STA_KEY_IDX_INVALID;
 
-       __set_bit(max_offs, mvm->fw_key_table);
-
        return max_offs;
 }
 
@@ -1507,10 +1505,8 @@ int iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
        }
 
        ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, key_offset, mcast);
-       if (ret) {
-               __clear_bit(keyconf->hw_key_idx, mvm->fw_key_table);
+       if (ret)
                goto end;
-       }
 
        /*
         * For WEP, the same key is used for multicast and unicast. Upload it
@@ -1523,11 +1519,13 @@ int iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
                ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf,
                                            key_offset, !mcast);
                if (ret) {
-                       __clear_bit(keyconf->hw_key_idx, mvm->fw_key_table);
                        __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
+                       goto end;
                }
        }
 
+       __set_bit(key_offset, mvm->fw_key_table);
+
 end:
        IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n",
                      keyconf->cipher, keyconf->keylen, keyconf->keyidx,