> Yes, it is true the PHY and SERDES enables in Global 2 should be
> cleared before the interrupt handler is installed for device
> interrupts.  That's what is done for the interrupts enables in
> Global 1.  I'm not seeing that these enables are initialized.
> 
> Which switch?

6390X.

> The device interrupts are not be cleared properly on that board.

I added in code to mask all interrupts. It did not help. I need to go
deeper and see if it is a PHY problem.

> I suspect the same would happen if level interrupts were used.

I've not seen it loop. Which is why i want to understand it fully.

     Andrew

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