+#define MWIFIEX_IBSS_CONNECT_EVT_FIX_SIZE 12
+
+static int mwifiex_check_ibss_peer_capabilties(struct mwifiex_private *priv,
+ struct mwifiex_sta_node *sta_ptr,
+ struct sk_buff *event)
+{
+ int evt_len, ele_len;
+ u8 *curr;
+ struct ieee_types_header *ele_hdr;
+ struct mwifiex_ie_types_mgmt_frame *tlv_mgmt_frame;
+ const struct ieee80211_ht_cap *ht_cap;
+ const struct ieee80211_vht_cap *vht_cap;
+
+ skb_pull(event, MWIFIEX_IBSS_CONNECT_EVT_FIX_SIZE);
+ evt_len = event->len;
+ curr = event->data;
+
+ mwifiex_dbg_dump(priv->adapter, EVT_D, "ibss peer capabilties:",
+ event->data, event->len);
+
+ skb_push(event, MWIFIEX_IBSS_CONNECT_EVT_FIX_SIZE);
+
+ tlv_mgmt_frame = (void *)curr;
+ if (evt_len >= sizeof(*tlv_mgmt_frame) &&
+ le16_to_cpu(tlv_mgmt_frame->header.type) ==
+ TLV_TYPE_UAP_MGMT_FRAME) {
+ /* Locate curr pointer to the start of beacon tlv,
+ * timestamp 8 bytes, beacon intervel 2 bytes,
+ * capability info 2 bytes, totally 12 byte beacon header
+ */
+ evt_len = le16_to_cpu(tlv_mgmt_frame->header.len);
+ curr += (sizeof(*tlv_mgmt_frame) + 12);
+ } else {
+ mwifiex_dbg(priv->adapter, MSG,
+ "management frame tlv not found!\n");
+ return 0;
+ }
+
+ while (evt_len >= sizeof(*ele_hdr)) {
+ ele_hdr = (struct ieee_types_header *)curr;
+ ele_len = ele_hdr->len;
+
+ if (evt_len < ele_len + sizeof(*ele_hdr))
+ break;
+
+ switch (ele_hdr->element_id) {
+ case WLAN_EID_HT_CAPABILITY:
+ sta_ptr->is_11n_enabled = true;
+ ht_cap = (void *)(ele_hdr + 2);
+ sta_ptr->max_amsdu = le16_to_cpu(ht_cap->cap_info) &
+ IEEE80211_HT_CAP_MAX_AMSDU ?
+ MWIFIEX_TX_DATA_BUF_SIZE_8K :
+ MWIFIEX_TX_DATA_BUF_SIZE_4K;
+ mwifiex_dbg(priv->adapter, INFO,
+ "11n enabled!, max_amsdu : %d\n",
+ sta_ptr->max_amsdu);
+ break;
+
+ case WLAN_EID_VHT_CAPABILITY:
+ sta_ptr->is_11ac_enabled = true;
+ vht_cap = (void *)(ele_hdr + 2);
+ /* check VHT MAXMPDU capability */
+ switch (le32_to_cpu(vht_cap->vht_cap_info) & 0x3) {
+ case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_11454:
+ sta_ptr->max_amsdu =
+ MWIFIEX_TX_DATA_BUF_SIZE_12K;
+ break;
+ case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_7991:
+ sta_ptr->max_amsdu =
+ MWIFIEX_TX_DATA_BUF_SIZE_8K;
+ break;
+ case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_3895:
+ sta_ptr->max_amsdu =
+ MWIFIEX_TX_DATA_BUF_SIZE_4K;
+ default:
+ break;
+ }
+
+ mwifiex_dbg(priv->adapter, INFO,
+ "11ac enabled!, max_amsdu : %d\n",
+ sta_ptr->max_amsdu);
+ break;
+ default:
+ break;
+ }
+
+ curr += (ele_len + sizeof(*ele_hdr));
+ evt_len -= (ele_len + sizeof(*ele_hdr));
+ }
+
+ return 0;
+}
+