static int apb_get_cport_count()

in es2.c [1201:1236]

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

static int apb_get_cport_count(struct usb_device *udev)
{
	int retval;
	__le16 *cport_count;

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

	retval = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
				 GB_APB_REQUEST_CPORT_COUNT,
				 USB_DIR_IN | USB_TYPE_VENDOR |
				 USB_RECIP_INTERFACE, 0, 0, cport_count,
				 sizeof(*cport_count), ES2_USB_CTRL_TIMEOUT);
	if (retval != sizeof(*cport_count)) {
		dev_err(&udev->dev, "Cannot retrieve CPort count: %d\n",
			retval);

		if (retval >= 0)
			retval = -EIO;

		goto out;
	}

	retval = le16_to_cpu(*cport_count);

	/* We need to fit a CPort ID in one byte of a message header */
	if (retval > U8_MAX) {
		retval = U8_MAX;
		dev_warn(&udev->dev, "Limiting number of CPorts to U8_MAX\n");
	}

out:
	kfree(cport_count);
	return retval;
}