[parisc-linux] Dino PCI and I/O spaces

[Alan Cox]

> > On a uniprocessor we might take an interrupt between the two cycles. So we
> > have to suffer anyway
> 
> Then we ought to disable interrupts, surely?  Otherwise we can have:
> 
> Grab lock
> interrupt taken
> driver attempts to perform IO, tries to take lock, machine hangs solid.
> 
> Or what sort of locking scheme did you have in mind?

Im already using spinlock_irqsave, for the obvious reason you enumerate above