SAA7164_BUFFER_FREE
if (buf->flags != SAA7164_BUFFER_FREE)
BUG_ON(buf->flags != SAA7164_BUFFER_FREE);
buf->flags = SAA7164_BUFFER_FREE;
buf->flags = SAA7164_BUFFER_FREE;
buf->flags = SAA7164_BUFFER_FREE;
buf->flags = SAA7164_BUFFER_FREE;