Unable to capture device interrupts on ppc440gx?

[Sanjay Bajaj]

In the device driver open function, I call request_irq() to register my interrupt handler function to a specified IRQ number. It succeeds. But when I enable the interrupt (and we can detect the hardware line is active) on the hardware, the interrupt handler in NOT invoked. Is there something I am missing? Any help or pointers are appreciated.

Sanjay