static int cport_enable()

in es2.c [541:581]

• 34 lines of code
• 5 McCabe index (conditional complexity)

static int cport_enable(struct gb_host_device *hd, u16 cport_id,
			unsigned long flags)
{
	struct es2_ap_dev *es2 = hd_to_es2(hd);
	struct usb_device *udev = es2->usb_dev;
	struct gb_apb_request_cport_flags *req;
	u32 connection_flags;
	int ret;

	req = kzalloc(sizeof(*req), GFP_KERNEL);
	if (!req)
		return -ENOMEM;

	connection_flags = 0;
	if (flags & GB_CONNECTION_FLAG_CONTROL)
		connection_flags |= GB_APB_CPORT_FLAG_CONTROL;
	if (flags & GB_CONNECTION_FLAG_HIGH_PRIO)
		connection_flags |= GB_APB_CPORT_FLAG_HIGH_PRIO;

	req->flags = cpu_to_le32(connection_flags);

	dev_dbg(&hd->dev, "%s - cport = %u, flags = %02x\n", __func__,
		cport_id, connection_flags);

	ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
			      GB_APB_REQUEST_CPORT_FLAGS,
			      USB_DIR_OUT | USB_TYPE_VENDOR |
			      USB_RECIP_INTERFACE, cport_id, 0,
			      req, sizeof(*req), ES2_USB_CTRL_TIMEOUT);
	if (ret < 0) {
		dev_err(&udev->dev, "failed to set cport flags for port %d\n",
			cport_id);
		goto out;
	}

	ret = 0;
out:
	kfree(req);

	return ret;
}