Roland> What would pci_irq_sync() do exactly?

    Greg> Consolidate common code like this?  :)

I don't see how one can do that.  As I pointed out in my reply to
Jeff, it actually requires understanding how the driver uses the
different MSI-X vectors to know which vector we need to synchronize
against.  So it seems pci_irq_sync() would have to be psychic.

If we can figure out how to do that, maybe we can consolidate a lot
more code into an API like

        void do_what_i_mean(void);

;)

 - R.
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