nimble/host: remove check srv supported features

According to Core Specification Version 5.4, Vol 3,
Part G, section 6.2.1, it is not necesarry to check
the Server Supported Features characteristic before
attempting to esablish an EATT bearer.

nimble/host/src/ble_eatt.c

@@ -73,7 +73,6 @@ static struct os_mempool ble_eatt_sdu_mbuf_mempool;
 static struct ble_gap_event_listener ble_eatt_listener;
 
 static struct ble_npl_event g_read_sup_cl_feat_ev;
-static struct ble_npl_event g_read_sup_srv_feat_ev;
 
 static void ble_eatt_setup_cb(struct ble_npl_event *ev);
 static void ble_eatt_start(uint16_t conn_handle);
@@ -389,49 +388,6 @@ ble_gatt_eatt_read_cl_uuid_cb(uint16_t conn_handle,
     return BLE_HS_EDONE;
 }
 
-static int
-ble_gatt_eatt_read_uuid_cb(uint16_t conn_handle,
-                           const struct ble_gatt_error *error,
-                           struct ble_gatt_attr *attr, void *arg)
-{
-    uint8_t supported_features;
-    int rc;
-
-    if (error == NULL || (error->status != 0 && error->status != BLE_HS_EDONE)) {
-        BLE_EATT_LOG_DEBUG("eatt: Cannot find Server Supported features on peer device\n");
-        return BLE_HS_EDONE;
-    }
-
-    if (attr == NULL) {
-        BLE_EATT_LOG_ERROR("eatt: Invalid attribute \n");
-        return BLE_HS_EDONE;
-    }
-
-    rc = os_mbuf_copydata(attr->om, 0, 1, &supported_features);
-    if (rc) {
-        BLE_EATT_LOG_ERROR("eatt: Cannot read srv supported features \n");
-        return BLE_HS_EDONE;
-    }
-
-    if (supported_features & 0x01) {
-        ble_npl_event_set_arg(&g_read_sup_cl_feat_ev, UINT_TO_POINTER(conn_handle));
-        ble_npl_eventq_put(ble_hs_evq_get(), &g_read_sup_cl_feat_ev);
-    }
-    return BLE_HS_EDONE;
-}
-
-static void
-ble_gatt_eatt_read_svr_uuid(struct ble_npl_event *ev)
-{
-    uint16_t conn_handle;
-
-    conn_handle = POINTER_TO_UINT(ble_npl_event_get_arg(ev));
-
-    ble_gattc_read_by_uuid(conn_handle, 1, 0xffff,
-                           BLE_UUID16_DECLARE(BLE_SVC_GATT_CHR_SERVER_SUPPORTED_FEAT_UUID16),
-                           ble_gatt_eatt_read_uuid_cb, NULL);
-}
-
 static void
 ble_gatt_eatt_read_cl_uuid(struct ble_npl_event *ev)
 {
@@ -463,8 +419,8 @@ ble_eatt_gap_event(struct ble_gap_event *event, void *arg)
         BLE_EATT_LOG_DEBUG("eatt: Encryption enabled, connecting EATT (conn_handle=0x%04x)\n",
                             event->enc_change.conn_handle);
 
-        ble_npl_event_set_arg(&g_read_sup_srv_feat_ev, UINT_TO_POINTER(event->enc_change.conn_handle));
-        ble_npl_eventq_put(ble_hs_evq_get(), &g_read_sup_srv_feat_ev);
+        ble_npl_event_set_arg(&g_read_sup_cl_feat_ev, UINT_TO_POINTER(event->enc_change.conn_handle));
+        ble_npl_eventq_put(ble_hs_evq_get(), &g_read_sup_cl_feat_ev);
 
         break;
     case BLE_GAP_EVENT_DISCONNECT:
@@ -591,7 +547,6 @@ ble_eatt_init(ble_eatt_att_rx_fn att_rx_cb)
     ble_gap_event_listener_register(&ble_eatt_listener, ble_eatt_gap_event, NULL);
     ble_l2cap_create_server(BLE_EATT_PSM, MYNEWT_VAL(BLE_EATT_MTU), ble_eatt_l2cap_event_fn, NULL);
 
-    ble_npl_event_init(&g_read_sup_srv_feat_ev, ble_gatt_eatt_read_svr_uuid, NULL);
     ble_npl_event_init(&g_read_sup_cl_feat_ev, ble_gatt_eatt_read_cl_uuid, NULL);
 
     ble_eatt_att_rx_cb = att_rx_cb;