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ath10k: use workqueue to set WEP TX key
Recent WMI/HTC changes made it possible for WMI commands to sleep (if there's not enough HTC TX credits to submit a command). TX path is in an atomic context so calling WMI commands in it is wrong. This simply moves WEP key index update to a worker and fixes the 'scheduling while atomic' bug. This still leaves multiple WEP key handling laggy, i.e. some frames may be TXed with an old/different key (although recipient should still be able to RX them). kvalo: changed the title Signed-off-by: Michal Kazior <michal.kazior@tieto.com> Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
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@ -215,8 +215,10 @@ struct ath10k_vif {
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struct ath10k *ar;
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struct ieee80211_vif *vif;
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struct work_struct wep_key_work;
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struct ieee80211_key_conf *wep_keys[WMI_MAX_KEY_INDEX + 1];
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u8 def_wep_key_index;
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u8 def_wep_key_idx;
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u8 def_wep_key_newidx;
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u16 tx_seq_no;
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@ -1239,7 +1239,7 @@ static void ath10k_bss_disassoc(struct ieee80211_hw *hw,
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/* FIXME: why don't we print error if wmi call fails? */
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ret = ath10k_wmi_vdev_down(ar, arvif->vdev_id);
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arvif->def_wep_key_index = 0;
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arvif->def_wep_key_idx = 0;
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}
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static int ath10k_station_assoc(struct ath10k *ar, struct ath10k_vif *arvif,
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@ -1467,6 +1467,30 @@ static void ath10k_tx_h_qos_workaround(struct ieee80211_hw *hw,
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skb_pull(skb, IEEE80211_QOS_CTL_LEN);
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}
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static void ath10k_tx_wep_key_work(struct work_struct *work)
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{
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struct ath10k_vif *arvif = container_of(work, struct ath10k_vif,
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wep_key_work);
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int ret, keyidx = arvif->def_wep_key_newidx;
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if (arvif->def_wep_key_idx == keyidx)
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return;
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ath10k_dbg(ATH10K_DBG_MAC, "mac vdev %d set keyidx %d\n",
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arvif->vdev_id, keyidx);
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ret = ath10k_wmi_vdev_set_param(arvif->ar,
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arvif->vdev_id,
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arvif->ar->wmi.vdev_param->def_keyid,
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keyidx);
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if (ret) {
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ath10k_warn("could not update wep keyidx (%d)\n", ret);
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return;
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}
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arvif->def_wep_key_idx = keyidx;
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}
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static void ath10k_tx_h_update_wep_key(struct sk_buff *skb)
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{
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struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
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@ -1475,8 +1499,6 @@ static void ath10k_tx_h_update_wep_key(struct sk_buff *skb)
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struct ath10k *ar = arvif->ar;
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struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
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struct ieee80211_key_conf *key = info->control.hw_key;
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u32 vdev_param;
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int ret;
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if (!ieee80211_has_protected(hdr->frame_control))
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return;
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@ -1488,21 +1510,14 @@ static void ath10k_tx_h_update_wep_key(struct sk_buff *skb)
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key->cipher != WLAN_CIPHER_SUITE_WEP104)
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return;
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if (key->keyidx == arvif->def_wep_key_index)
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if (key->keyidx == arvif->def_wep_key_idx)
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return;
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ath10k_dbg(ATH10K_DBG_MAC, "mac vdev %d keyidx %d\n",
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arvif->vdev_id, key->keyidx);
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vdev_param = ar->wmi.vdev_param->def_keyid;
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ret = ath10k_wmi_vdev_set_param(ar, arvif->vdev_id, vdev_param,
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key->keyidx);
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if (ret) {
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ath10k_warn("could not update wep keyidx (%d)\n", ret);
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return;
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}
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arvif->def_wep_key_index = key->keyidx;
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/* FIXME: Most likely a few frames will be TXed with an old key. Simply
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* queueing frames until key index is updated is not an option because
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* sk_buff may need more processing to be done, e.g. offchannel */
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arvif->def_wep_key_newidx = key->keyidx;
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ieee80211_queue_work(ar->hw, &arvif->wep_key_work);
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}
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static void ath10k_tx_h_add_p2p_noa_ie(struct ath10k *ar, struct sk_buff *skb)
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@ -2023,6 +2038,8 @@ static int ath10k_add_interface(struct ieee80211_hw *hw,
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arvif->ar = ar;
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arvif->vif = vif;
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INIT_WORK(&arvif->wep_key_work, ath10k_tx_wep_key_work);
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if ((vif->type == NL80211_IFTYPE_MONITOR) && ar->monitor_present) {
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ath10k_warn("Only one monitor interface allowed\n");
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ret = -EBUSY;
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@ -2078,7 +2095,7 @@ static int ath10k_add_interface(struct ieee80211_hw *hw,
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vdev_param = ar->wmi.vdev_param->def_keyid;
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ret = ath10k_wmi_vdev_set_param(ar, 0, vdev_param,
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arvif->def_wep_key_index);
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arvif->def_wep_key_idx);
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if (ret)
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ath10k_warn("Failed to set default keyid: %d\n", ret);
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@ -2147,6 +2164,8 @@ static void ath10k_remove_interface(struct ieee80211_hw *hw,
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mutex_lock(&ar->conf_mutex);
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cancel_work_sync(&arvif->wep_key_work);
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spin_lock_bh(&ar->data_lock);
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if (arvif->beacon) {
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dev_kfree_skb_any(arvif->beacon);
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