I have a device driver that was working on a few computers. When I installed in on another computer I stopped getting interrupts. What I noticed was that the IRQ in /proc/pci and the IRQ in the configuration registers are not the same. (See below) And if I use the IRQ from the configurations registers it doesn't work, but when I hardcode the IRQ from /proc/pci it does work. I have a few questions. 1. Shouldn't the values be the same? 2. Who is responsible for assigning the IRQ, the BIOS or Linux? Or is what happened that the bios assigned it, and then Linux changed it, and the configurations registers were not updated? 3. Should I be taking the irq from /proc/pci instead of the configuration registers, and if so how do I do that? Thanks in advance, Linda /proc/pci: Bus 3, device 5, function 0: IRQ 29. Master Capable. Latency=64. Non-prefetchable 32 bit memory at 0xc6ff7c00 [0xc6ff7fff]. Non-prefetchable 32 bit memory at 0xc6f00000 [0xc6f7ffff]. Non-prefetchable 32 bit memory at 0xc6800000 [0xc6bfffff]. 03:05.0 Class 1080: 1222:0004 (rev 01) 00: a8 12 04 00 17 01 90 02 01 00 80 10 08 40 00 00 10: 00 7c ff c6 00 00 f0 c6 00 00 80 c6 00 00 00 00 20: 00 00 00 00 00 00 00 00 00 00 00 00 b5 10 80 04 30: 00 00 00 00 40 00 00 00 00 00 00 00 0f 01 00 00 __________________________________________________________ Information contained in this email message is intended only for use of the individual or entity named above. If the reader of this message is not the intended recipient, or the employee or agent responsible to deliver it to the intended recipient, you are hereby notified that any dissemination, distribution or copying of this communication is strictly prohibited. If you have received this communication in error, please immediately notify the postmaster@ndsisrael.com and destroy the original message. -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
