MPC5200b external interrupt registration problem

Scott Wood scottwood at
Sat May 10 05:02:20 EST 2008

On Fri, May 09, 2008 at 02:49:04PM -0400, Nick wrote:
> I am writing a driver to service an interrupt from our fpga.  I am calling request_irq in the open
> function of my driver.  The fpga is connected to external interrupt 1.  I am using interrupt
> number 65 in the request_irq but the function is failing.

request_irq takes a virtual IRQ number, not a hardware IRQ number.  You
need to get the virtual IRQ number from irq_of_parse_and_map(), or from

This would probably confuse far fewer people if we used pointers in the
API rather than virtual IRQ numbers...


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