Messages in this thread | | | From | Greg Johnson <> | Subject | Interrupts not being raised. | Date | Fri, 12 Feb 1999 11:33:07 +1100 (EST) |
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Hello,
I am writting a Linux module device driver form some PCI hardware our company has made. The problem I am having concerns interrupt handling. I install the interrupt handler with
iRetCode = request_irq ( PCIIrqLine, &interrupt_handler, 0, "our device", &board_info_structure );
and call
enable_irq(PCIIrqLine);
I have been able to confirm that our PCI card thinks that it is raising an interrupt, but the interrupt routine never gets called. In addition, checking /proc/interrupts shows
0: 169002 timer 1: 2 keyboard 2: 0 cascade 8: 1 + rtc 9: 56601 eth0 10: 6136 aic7xxx 11: 0 out device 12: 4 PS/2 Mouse 13: 1 math error 15: 0 + ide1
a count of 0 which has never changed. That is, the kernel never receives an interrupt.
I have also replaced our PCI device with another to rule out the dodgy component possibility and behaviour stays the same.
I have been using "Linux Device Drivers" by Alessandro Rubini and have rechecked everything he says on Interrupt Handling and PCI devices, and as fare as I can tell, when it comes to PCI this is all there is.
If anyone has any words of wisdom they could share, it would be appreciated. Or is there a good example of handling interrupts on a PCI device somewhere in the kernel?
Regards
Greg.
-- +----------------------------------------------------+ | Do you want to know more? | | --== Greg Johnson ==-- | | HW/SW Engineer gjohnson@research.canon.com.au | | Canon Information Systems Research Australia | | 1 Thomas Holt Dr, North Ryde, NSW, 2113, Australia | | "I FLEXed my BISON and it went YACC!" - me. | +----------------------------------------------------+
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