You set nIEN and we need a whole new set of state diagrams for the driver.
nIEN = 0, interrupt driver
nIEN = 1, polling driver
You may not switch this in the middle of the execution of a command block.
If you want to try this, go for it, and leave me off the CC for the mess
you will make of your data.
On 9 Sep 2002, Alan Cox wrote:
> On Sun, 2002-09-08 at 11:57, Zwane Mwaikambo wrote:
> > iirc IDE is capable of doing its own masking per device(nIEN) and in fact
> > does even do unconditional sti's in its isr paths. So i would think it
> > would be one of the not so painful device drivers to take care of.
>
> If I remember rightly nIEN doesnt work everywhere. Also many IDE
> interfaces may be using legacy IRQ wiring rather than PCI irq lines.
>
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Andre Hedrick
LAD Storage Consulting Group
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