static int hdm_add_padding()

in most_usb.c [276:298]

• 20 lines of code
• 4 McCabe index (conditional complexity)

static int hdm_add_padding(struct most_dev *mdev, int channel, struct mbo *mbo)
{
	struct most_channel_config *conf = &mdev->conf[channel];
	unsigned int frame_size = get_stream_frame_size(&mdev->dev, conf);
	unsigned int j, num_frames;

	if (!frame_size)
		return -EINVAL;
	num_frames = mbo->buffer_length / frame_size;

	if (num_frames < 1) {
		dev_err(&mdev->usb_device->dev,
			"Missed minimal transfer unit.\n");
		return -EINVAL;
	}

	for (j = num_frames - 1; j > 0; j--)
		memmove(mbo->virt_address + j * USB_MTU,
			mbo->virt_address + j * frame_size,
			frame_size);
	mbo->buffer_length = num_frames * USB_MTU;
	return 0;
}