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SubjectRe: More on the IDE multiwrite problem
> Then I would suggest to have the low level drivers register a function
> that does the chipset specific stuff. The generic IDE code really
> shouldn't know anything about disable_irq()/enable_irq() nor try to
> use them.

Not all chipsets have such a facility. That makes handling the early IRQ
case really nasty. But doable - suppose instead of multwrite_intr a seperate
multwrite_maybe_early_intr is registered , then we kick stuff off.

the maybe_early_intr can handle the quirk case

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