Hi all, I don't understand, how can i write to device. I do the next steps to read/write to device pci_resource_start (dev, BAR) a = ioremap_nocache (BAR,length) readb (a) write (0x10, a) Is it right? Thanks Kirill -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/