static void hci_req_start_scan(struct hci_request *req, u8 type, u16 interval,
			       u16 window, u8 own_addr_type, u8 filter_policy,
			       bool addr_resolv)
{
	struct hci_dev *hdev = req->hdev;

	if (hdev->scanning_paused) {
		bt_dev_dbg(hdev, "Scanning is paused for suspend");
		return;
	}

	if (use_ll_privacy(hdev) &&
	    hci_dev_test_flag(hdev, HCI_ENABLE_LL_PRIVACY) &&
	    addr_resolv) {
		u8 enable = 0x01;

		hci_req_add(req, HCI_OP_LE_SET_ADDR_RESOLV_ENABLE, 1, &enable);
	}

	/* Use ext scanning if set ext scan param and ext scan enable is
	 * supported
	 */
	if (use_ext_scan(hdev)) {
		struct hci_cp_le_set_ext_scan_params *ext_param_cp;
		struct hci_cp_le_set_ext_scan_enable ext_enable_cp;
		struct hci_cp_le_scan_phy_params *phy_params;
		u8 data[sizeof(*ext_param_cp) + sizeof(*phy_params) * 2];
		u32 plen;

		ext_param_cp = (void *)data;
		phy_params = (void *)ext_param_cp->data;

		memset(ext_param_cp, 0, sizeof(*ext_param_cp));
		ext_param_cp->own_addr_type = own_addr_type;
		ext_param_cp->filter_policy = filter_policy;

		plen = sizeof(*ext_param_cp);

		if (scan_1m(hdev) || scan_2m(hdev)) {
			ext_param_cp->scanning_phys |= LE_SCAN_PHY_1M;

			memset(phy_params, 0, sizeof(*phy_params));
			phy_params->type = type;
			phy_params->interval = cpu_to_le16(interval);
			phy_params->window = cpu_to_le16(window);

			plen += sizeof(*phy_params);
			phy_params++;
		}

		if (scan_coded(hdev)) {
			ext_param_cp->scanning_phys |= LE_SCAN_PHY_CODED;

			memset(phy_params, 0, sizeof(*phy_params));
			phy_params->type = type;
			phy_params->interval = cpu_to_le16(interval);
			phy_params->window = cpu_to_le16(window);

			plen += sizeof(*phy_params);
			phy_params++;
		}

		hci_req_add(req, HCI_OP_LE_SET_EXT_SCAN_PARAMS,
			    plen, ext_param_cp);

		memset(&ext_enable_cp, 0, sizeof(ext_enable_cp));
		ext_enable_cp.enable = LE_SCAN_ENABLE;
		ext_enable_cp.filter_dup = LE_SCAN_FILTER_DUP_ENABLE;

		hci_req_add(req, HCI_OP_LE_SET_EXT_SCAN_ENABLE,
			    sizeof(ext_enable_cp), &ext_enable_cp);
	} else {
		struct hci_cp_le_set_scan_param param_cp;
		struct hci_cp_le_set_scan_enable enable_cp;

		memset(&param_cp, 0, sizeof(param_cp));
		param_cp.type = type;
		param_cp.interval = cpu_to_le16(interval);
		param_cp.window = cpu_to_le16(window);
		param_cp.own_address_type = own_addr_type;
		param_cp.filter_policy = filter_policy;
		hci_req_add(req, HCI_OP_LE_SET_SCAN_PARAM, sizeof(param_cp),
			    &param_cp);

		memset(&enable_cp, 0, sizeof(enable_cp));
		enable_cp.enable = LE_SCAN_ENABLE;
		enable_cp.filter_dup = LE_SCAN_FILTER_DUP_ENABLE;
		hci_req_add(req, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(enable_cp),
			    &enable_cp);
	}
}
static void hci_req_start_scan(struct hci_request *req, u8 type, u16 interval,
			       u16 window, u8 own_addr_type, u8 filter_policy,
			       bool addr_resolv)
{
	struct hci_dev *hdev = req->hdev;

	if (hdev->scanning_paused) {
		bt_dev_dbg(hdev, "Scanning is paused for suspend");
		return;
	}

	if (use_ll_privacy(hdev) &&
	    hci_dev_test_flag(hdev, HCI_ENABLE_LL_PRIVACY) &&
	    addr_resolv) {
		u8 enable = 0x01;

		hci_req_add(req, HCI_OP_LE_SET_ADDR_RESOLV_ENABLE, 1, &enable);
	}

	 
	if (use_ext_scan(hdev)) {
		struct hci_cp_le_set_ext_scan_params *ext_param_cp;
		struct hci_cp_le_set_ext_scan_enable ext_enable_cp;
		struct hci_cp_le_scan_phy_params *phy_params;
		u8 data[sizeof(*ext_param_cp) + sizeof(*phy_params) * 2];
		u32 plen;

		ext_param_cp = (void *)data;
		phy_params = (void *)ext_param_cp->data;

		memset(ext_param_cp, 0, sizeof(*ext_param_cp));
		ext_param_cp->own_addr_type = own_addr_type;
		ext_param_cp->filter_policy = filter_policy;

		plen = sizeof(*ext_param_cp);

		if (scan_1m(hdev) || scan_2m(hdev)) {
			ext_param_cp->scanning_phys |= LE_SCAN_PHY_1M;

			memset(phy_params, 0, sizeof(*phy_params));
			phy_params->type = type;
			phy_params->interval = cpu_to_le16(interval);
			phy_params->window = cpu_to_le16(window);

			plen += sizeof(*phy_params);
			phy_params++;
		}

		if (scan_coded(hdev)) {
			ext_param_cp->scanning_phys |= LE_SCAN_PHY_CODED;

			memset(phy_params, 0, sizeof(*phy_params));
			phy_params->type = type;
			phy_params->interval = cpu_to_le16(interval);
			phy_params->window = cpu_to_le16(window);

			plen += sizeof(*phy_params);
			phy_params++;
		}

		hci_req_add(req, HCI_OP_LE_SET_EXT_SCAN_PARAMS,
			    plen, ext_param_cp);

		memset(&ext_enable_cp, 0, sizeof(ext_enable_cp));
		ext_enable_cp.enable = LE_SCAN_ENABLE;
		ext_enable_cp.filter_dup = LE_SCAN_FILTER_DUP_ENABLE;

		hci_req_add(req, HCI_OP_LE_SET_EXT_SCAN_ENABLE,
			    sizeof(ext_enable_cp), &ext_enable_cp);
	} else {
		struct hci_cp_le_set_scan_param param_cp;
		struct hci_cp_le_set_scan_enable enable_cp;

		memset(&param_cp, 0, sizeof(param_cp));
		param_cp.type = type;
		param_cp.interval = cpu_to_le16(interval);
		param_cp.window = cpu_to_le16(window);
		param_cp.own_address_type = own_addr_type;
		param_cp.filter_policy = filter_policy;
		hci_req_add(req, HCI_OP_LE_SET_SCAN_PARAM, sizeof(param_cp),
			    &param_cp);

		memset(&enable_cp, 0, sizeof(enable_cp));
		enable_cp.enable = LE_SCAN_ENABLE;
		enable_cp.filter_dup = LE_SCAN_FILTER_DUP_ENABLE;
		hci_req_add(req, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(enable_cp),
			    &enable_cp);
	}
}