Re: [PATCH #upstream-fixes] libata: kill spurious NCQ completion detection

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Tejun Heo wrote:
Spurious NCQ completion detection implemented in ahci was incorrect.
On AHCI receving and processing FISes and raising interrupts are not
interlocked and spurious interrupts are expected.

For example, if an interrupt occurs while interrupt handler is running
and the running interrupt handler handles the event the new IRQ
indicated, after IRQ handler finishes, it will be executed again
because IRQ pending bit is set by the new interrupt but there won't be
anything to process.
...

Great job tracking that one down, Tejun!

Cheers
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