Hi, I'm trying to write a simple driver using some registers of my hardware. Is a call to request_mem_region() advisory ("recommended") or compulsory before I ioremap the memory? In other words, if I don't use request_mem_region() before I start using the memory; is my driver BOUND to fail, or it MAY fail? Thanks, Rick - To unsubscribe from this list: send the line "unsubscribe linux-newbie" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.linux-learn.org/faqs