[ath6kl:ath10k-pending-sdio-usb 19/23] drivers/net/wireless/ath/ath10k/mac.c:5062:26: warning: cast from pointer to integer of different size
kbuild test robot
fengguang.wu at intel.com
Sat Dec 2 10:11:25 PST 2017
tree: https://git.kernel.org/pub/scm/linux/kernel/git/kvalo/ath.git ath10k-pending-sdio-usb
head: c595220acc6c02730d3316eecbbea2543303bb4f
commit: 35461ca94f6aa2f7a6d71f8c397649237385f63a [19/23] ath10k_sdio: high latency fixes for beacon buffer
config: i386-randconfig-x007-201749 (attached as .config)
compiler: gcc-7 (Debian 7.2.0-12) 7.2.1 20171025
reproduce:
git checkout 35461ca94f6aa2f7a6d71f8c397649237385f63a
# save the attached .config to linux build tree
make ARCH=i386
All warnings (new ones prefixed by >>):
drivers/net/wireless/ath/ath10k/mac.c: In function 'ath10k_add_interface':
>> drivers/net/wireless/ath/ath10k/mac.c:5062:26: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
arvif->beacon_paddr = (dma_addr_t)arvif->beacon_buf;
^
vim +5062 drivers/net/wireless/ath/ath10k/mac.c
4925
4926 /*
4927 * TODO:
4928 * Figure out how to handle WMI_VDEV_SUBTYPE_P2P_DEVICE,
4929 * because we will send mgmt frames without CCK. This requirement
4930 * for P2P_FIND/GO_NEG should be handled by checking CCK flag
4931 * in the TX packet.
4932 */
4933 static int ath10k_add_interface(struct ieee80211_hw *hw,
4934 struct ieee80211_vif *vif)
4935 {
4936 struct ath10k *ar = hw->priv;
4937 struct ath10k_vif *arvif = (void *)vif->drv_priv;
4938 struct ath10k_peer *peer;
4939 enum wmi_sta_powersave_param param;
4940 int ret = 0;
4941 u32 value;
4942 int bit;
4943 int i;
4944 u32 vdev_param;
4945
4946 vif->driver_flags |= IEEE80211_VIF_SUPPORTS_UAPSD;
4947
4948 mutex_lock(&ar->conf_mutex);
4949
4950 memset(arvif, 0, sizeof(*arvif));
4951 ath10k_mac_txq_init(vif->txq);
4952
4953 arvif->ar = ar;
4954 arvif->vif = vif;
4955
4956 INIT_LIST_HEAD(&arvif->list);
4957 INIT_WORK(&arvif->ap_csa_work, ath10k_mac_vif_ap_csa_work);
4958 INIT_DELAYED_WORK(&arvif->connection_loss_work,
4959 ath10k_mac_vif_sta_connection_loss_work);
4960
4961 for (i = 0; i < ARRAY_SIZE(arvif->bitrate_mask.control); i++) {
4962 arvif->bitrate_mask.control[i].legacy = 0xffffffff;
4963 memset(arvif->bitrate_mask.control[i].ht_mcs, 0xff,
4964 sizeof(arvif->bitrate_mask.control[i].ht_mcs));
4965 memset(arvif->bitrate_mask.control[i].vht_mcs, 0xff,
4966 sizeof(arvif->bitrate_mask.control[i].vht_mcs));
4967 }
4968
4969 if (ar->num_peers >= ar->max_num_peers) {
4970 ath10k_warn(ar, "refusing vdev creation due to insufficient peer entry resources in firmware\n");
4971 ret = -ENOBUFS;
4972 goto err;
4973 }
4974
4975 if (ar->free_vdev_map == 0) {
4976 ath10k_warn(ar, "Free vdev map is empty, no more interfaces allowed.\n");
4977 ret = -EBUSY;
4978 goto err;
4979 }
4980 bit = __ffs64(ar->free_vdev_map);
4981
4982 ath10k_dbg(ar, ATH10K_DBG_MAC, "mac create vdev %i map %llx\n",
4983 bit, ar->free_vdev_map);
4984
4985 arvif->vdev_id = bit;
4986 arvif->vdev_subtype =
4987 ath10k_wmi_get_vdev_subtype(ar, WMI_VDEV_SUBTYPE_NONE);
4988
4989 switch (vif->type) {
4990 case NL80211_IFTYPE_P2P_DEVICE:
4991 arvif->vdev_type = WMI_VDEV_TYPE_STA;
4992 arvif->vdev_subtype = ath10k_wmi_get_vdev_subtype
4993 (ar, WMI_VDEV_SUBTYPE_P2P_DEVICE);
4994 break;
4995 case NL80211_IFTYPE_UNSPECIFIED:
4996 case NL80211_IFTYPE_STATION:
4997 arvif->vdev_type = WMI_VDEV_TYPE_STA;
4998 if (vif->p2p)
4999 arvif->vdev_subtype = ath10k_wmi_get_vdev_subtype
5000 (ar, WMI_VDEV_SUBTYPE_P2P_CLIENT);
5001 break;
5002 case NL80211_IFTYPE_ADHOC:
5003 arvif->vdev_type = WMI_VDEV_TYPE_IBSS;
5004 break;
5005 case NL80211_IFTYPE_MESH_POINT:
5006 if (test_bit(WMI_SERVICE_MESH_11S, ar->wmi.svc_map)) {
5007 arvif->vdev_subtype = ath10k_wmi_get_vdev_subtype
5008 (ar, WMI_VDEV_SUBTYPE_MESH_11S);
5009 } else if (!test_bit(ATH10K_FLAG_RAW_MODE, &ar->dev_flags)) {
5010 ret = -EINVAL;
5011 ath10k_warn(ar, "must load driver with rawmode=1 to add mesh interfaces\n");
5012 goto err;
5013 }
5014 arvif->vdev_type = WMI_VDEV_TYPE_AP;
5015 break;
5016 case NL80211_IFTYPE_AP:
5017 arvif->vdev_type = WMI_VDEV_TYPE_AP;
5018
5019 if (vif->p2p)
5020 arvif->vdev_subtype = ath10k_wmi_get_vdev_subtype
5021 (ar, WMI_VDEV_SUBTYPE_P2P_GO);
5022 break;
5023 case NL80211_IFTYPE_MONITOR:
5024 arvif->vdev_type = WMI_VDEV_TYPE_MONITOR;
5025 break;
5026 default:
5027 WARN_ON(1);
5028 break;
5029 }
5030
5031 /* Using vdev_id as queue number will make it very easy to do per-vif
5032 * tx queue locking. This shouldn't wrap due to interface combinations
5033 * but do a modulo for correctness sake and prevent using offchannel tx
5034 * queues for regular vif tx.
5035 */
5036 vif->cab_queue = arvif->vdev_id % (IEEE80211_MAX_QUEUES - 1);
5037 for (i = 0; i < ARRAY_SIZE(vif->hw_queue); i++)
5038 vif->hw_queue[i] = arvif->vdev_id % (IEEE80211_MAX_QUEUES - 1);
5039
5040 /* Some firmware revisions don't wait for beacon tx completion before
5041 * sending another SWBA event. This could lead to hardware using old
5042 * (freed) beacon data in some cases, e.g. tx credit starvation
5043 * combined with missed TBTT. This is very very rare.
5044 *
5045 * On non-IOMMU-enabled hosts this could be a possible security issue
5046 * because hw could beacon some random data on the air. On
5047 * IOMMU-enabled hosts DMAR faults would occur in most cases and target
5048 * device would crash.
5049 *
5050 * Since there are no beacon tx completions (implicit nor explicit)
5051 * propagated to host the only workaround for this is to allocate a
5052 * DMA-coherent buffer for a lifetime of a vif and use it for all
5053 * beacon tx commands. Worst case for this approach is some beacons may
5054 * become corrupted, e.g. have garbled IEs or out-of-date TIM bitmap.
5055 */
5056 if (vif->type == NL80211_IFTYPE_ADHOC ||
5057 vif->type == NL80211_IFTYPE_MESH_POINT ||
5058 vif->type == NL80211_IFTYPE_AP) {
5059 if (ar->is_high_latency) {
5060 arvif->beacon_buf = kmalloc(IEEE80211_MAX_FRAME_LEN,
5061 GFP_KERNEL);
> 5062 arvif->beacon_paddr = (dma_addr_t)arvif->beacon_buf;
5063 } else {
5064 arvif->beacon_buf =
5065 dma_zalloc_coherent(ar->dev,
5066 IEEE80211_MAX_FRAME_LEN,
5067 &arvif->beacon_paddr,
5068 GFP_ATOMIC);
5069 }
5070 if (!arvif->beacon_buf) {
5071 ret = -ENOMEM;
5072 ath10k_warn(ar, "failed to allocate beacon buffer: %d\n",
5073 ret);
5074 goto err;
5075 }
5076 }
5077 if (test_bit(ATH10K_FLAG_HW_CRYPTO_DISABLED, &ar->dev_flags))
5078 arvif->nohwcrypt = true;
5079
5080 if (arvif->nohwcrypt &&
5081 !test_bit(ATH10K_FLAG_RAW_MODE, &ar->dev_flags)) {
5082 ath10k_warn(ar, "cryptmode module param needed for sw crypto\n");
5083 goto err;
5084 }
5085
5086 ath10k_dbg(ar, ATH10K_DBG_MAC, "mac vdev create %d (add interface) type %d subtype %d bcnmode %s\n",
5087 arvif->vdev_id, arvif->vdev_type, arvif->vdev_subtype,
5088 arvif->beacon_buf ? "single-buf" : "per-skb");
5089
5090 ret = ath10k_wmi_vdev_create(ar, arvif->vdev_id, arvif->vdev_type,
5091 arvif->vdev_subtype, vif->addr);
5092 if (ret) {
5093 ath10k_warn(ar, "failed to create WMI vdev %i: %d\n",
5094 arvif->vdev_id, ret);
5095 goto err;
5096 }
5097
5098 ar->free_vdev_map &= ~(1LL << arvif->vdev_id);
5099 spin_lock_bh(&ar->data_lock);
5100 list_add(&arvif->list, &ar->arvifs);
5101 spin_unlock_bh(&ar->data_lock);
5102
5103 /* It makes no sense to have firmware do keepalives. mac80211 already
5104 * takes care of this with idle connection polling.
5105 */
5106 ret = ath10k_mac_vif_disable_keepalive(arvif);
5107 if (ret) {
5108 ath10k_warn(ar, "failed to disable keepalive on vdev %i: %d\n",
5109 arvif->vdev_id, ret);
5110 goto err_vdev_delete;
5111 }
5112
5113 arvif->def_wep_key_idx = -1;
5114
5115 vdev_param = ar->wmi.vdev_param->tx_encap_type;
5116 ret = ath10k_wmi_vdev_set_param(ar, arvif->vdev_id, vdev_param,
5117 ATH10K_HW_TXRX_NATIVE_WIFI);
5118 /* 10.X firmware does not support this VDEV parameter. Do not warn */
5119 if (ret && ret != -EOPNOTSUPP) {
5120 ath10k_warn(ar, "failed to set vdev %i TX encapsulation: %d\n",
5121 arvif->vdev_id, ret);
5122 goto err_vdev_delete;
5123 }
5124
5125 /* Configuring number of spatial stream for monitor interface is causing
5126 * target assert in qca9888 and qca6174.
5127 */
5128 if (ar->cfg_tx_chainmask && (vif->type != NL80211_IFTYPE_MONITOR)) {
5129 u16 nss = get_nss_from_chainmask(ar->cfg_tx_chainmask);
5130
5131 vdev_param = ar->wmi.vdev_param->nss;
5132 ret = ath10k_wmi_vdev_set_param(ar, arvif->vdev_id, vdev_param,
5133 nss);
5134 if (ret) {
5135 ath10k_warn(ar, "failed to set vdev %i chainmask 0x%x, nss %i: %d\n",
5136 arvif->vdev_id, ar->cfg_tx_chainmask, nss,
5137 ret);
5138 goto err_vdev_delete;
5139 }
5140 }
5141
5142 if (arvif->vdev_type == WMI_VDEV_TYPE_AP ||
5143 arvif->vdev_type == WMI_VDEV_TYPE_IBSS) {
5144 ret = ath10k_peer_create(ar, vif, NULL, arvif->vdev_id,
5145 vif->addr, WMI_PEER_TYPE_DEFAULT);
5146 if (ret) {
5147 ath10k_warn(ar, "failed to create vdev %i peer for AP/IBSS: %d\n",
5148 arvif->vdev_id, ret);
5149 goto err_vdev_delete;
5150 }
5151
5152 spin_lock_bh(&ar->data_lock);
5153
5154 peer = ath10k_peer_find(ar, arvif->vdev_id, vif->addr);
5155 if (!peer) {
5156 ath10k_warn(ar, "failed to lookup peer %pM on vdev %i\n",
5157 vif->addr, arvif->vdev_id);
5158 spin_unlock_bh(&ar->data_lock);
5159 ret = -ENOENT;
5160 goto err_peer_delete;
5161 }
5162
5163 arvif->peer_id = find_first_bit(peer->peer_ids,
5164 ATH10K_MAX_NUM_PEER_IDS);
5165
5166 spin_unlock_bh(&ar->data_lock);
5167 } else {
5168 arvif->peer_id = HTT_INVALID_PEERID;
5169 }
5170
5171 if (arvif->vdev_type == WMI_VDEV_TYPE_AP) {
5172 ret = ath10k_mac_set_kickout(arvif);
5173 if (ret) {
5174 ath10k_warn(ar, "failed to set vdev %i kickout parameters: %d\n",
5175 arvif->vdev_id, ret);
5176 goto err_peer_delete;
5177 }
5178 }
5179
5180 if (arvif->vdev_type == WMI_VDEV_TYPE_STA) {
5181 param = WMI_STA_PS_PARAM_RX_WAKE_POLICY;
5182 value = WMI_STA_PS_RX_WAKE_POLICY_WAKE;
5183 ret = ath10k_wmi_set_sta_ps_param(ar, arvif->vdev_id,
5184 param, value);
5185 if (ret) {
5186 ath10k_warn(ar, "failed to set vdev %i RX wake policy: %d\n",
5187 arvif->vdev_id, ret);
5188 goto err_peer_delete;
5189 }
5190
5191 ret = ath10k_mac_vif_recalc_ps_wake_threshold(arvif);
5192 if (ret) {
5193 ath10k_warn(ar, "failed to recalc ps wake threshold on vdev %i: %d\n",
5194 arvif->vdev_id, ret);
5195 goto err_peer_delete;
5196 }
5197
5198 ret = ath10k_mac_vif_recalc_ps_poll_count(arvif);
5199 if (ret) {
5200 ath10k_warn(ar, "failed to recalc ps poll count on vdev %i: %d\n",
5201 arvif->vdev_id, ret);
5202 goto err_peer_delete;
5203 }
5204 }
5205
5206 ret = ath10k_mac_set_txbf_conf(arvif);
5207 if (ret) {
5208 ath10k_warn(ar, "failed to set txbf for vdev %d: %d\n",
5209 arvif->vdev_id, ret);
5210 goto err_peer_delete;
5211 }
5212
5213 ret = ath10k_mac_set_rts(arvif, ar->hw->wiphy->rts_threshold);
5214 if (ret) {
5215 ath10k_warn(ar, "failed to set rts threshold for vdev %d: %d\n",
5216 arvif->vdev_id, ret);
5217 goto err_peer_delete;
5218 }
5219
5220 arvif->txpower = vif->bss_conf.txpower;
5221 ret = ath10k_mac_txpower_recalc(ar);
5222 if (ret) {
5223 ath10k_warn(ar, "failed to recalc tx power: %d\n", ret);
5224 goto err_peer_delete;
5225 }
5226
5227 if (vif->type == NL80211_IFTYPE_MONITOR) {
5228 ar->monitor_arvif = arvif;
5229 ret = ath10k_monitor_recalc(ar);
5230 if (ret) {
5231 ath10k_warn(ar, "failed to recalc monitor: %d\n", ret);
5232 goto err_peer_delete;
5233 }
5234 }
5235
5236 spin_lock_bh(&ar->htt.tx_lock);
5237 if (!ar->tx_paused)
5238 ieee80211_wake_queue(ar->hw, arvif->vdev_id);
5239 spin_unlock_bh(&ar->htt.tx_lock);
5240
5241 mutex_unlock(&ar->conf_mutex);
5242 return 0;
5243
5244 err_peer_delete:
5245 if (arvif->vdev_type == WMI_VDEV_TYPE_AP ||
5246 arvif->vdev_type == WMI_VDEV_TYPE_IBSS)
5247 ath10k_wmi_peer_delete(ar, arvif->vdev_id, vif->addr);
5248
5249 err_vdev_delete:
5250 ath10k_wmi_vdev_delete(ar, arvif->vdev_id);
5251 ar->free_vdev_map |= 1LL << arvif->vdev_id;
5252 spin_lock_bh(&ar->data_lock);
5253 list_del(&arvif->list);
5254 spin_unlock_bh(&ar->data_lock);
5255
5256 err:
5257 if (arvif->beacon_buf) {
5258 if (ar->is_high_latency)
5259 kfree(arvif->beacon_buf);
5260 else
5261 dma_free_coherent(ar->dev, IEEE80211_MAX_FRAME_LEN,
5262 arvif->beacon_buf,
5263 arvif->beacon_paddr);
5264 arvif->beacon_buf = NULL;
5265 }
5266
5267 mutex_unlock(&ar->conf_mutex);
5268
5269 return ret;
5270 }
5271
---
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