Hi there, I'm writing a PCI driver that should work for a multiple of PCI-cards in a system, for each card that is found, a character device file is generated. This all works now and I'm at the point to write the read/ write functions. I have a question about this situation: Suppose I have four cards in my system and they're all recognized etc., i.e. there is a character device file for each of the card called /dev/pcitest-0..3. Let's say I would like to read 5 bytes from card 2 (/dev/pcitest-1) as a test: $ dd if=/dev/pcitest-1 bs=5 count=1 The functions open, read and close of my pcitest driver are called in this order and all works fine but it makes no difference for all the /dev/pcitest-... files as there is only *one* open/ read/ close function...Hmmm? My point is, how can I 'see' in the read function which physical device is addressed? As far as I know the registration of the character devices in the kernel is not linked to specific devices but to the _module_ itself. So the module gets four character device files to which it 'listens'. Can someone fill me in here? Thanks in advance, Kris -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
