Messages in this thread |  | | Date | Wed, 05 Feb 2003 09:19:28 -0800 | From | Ross Biro <> | Subject | Re: 2.4.21-pre4: PDC ide driver problems with shared interrupts |
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Benjamin Herrenschmidt wrote:
>While I agree with you here, I don't think it's what's happening. > /* clear INTR & ERROR flags */ > hwif->OUTB(dma_stat|6, hwif->dma_status); > > > You have way to much faith in the hardware. Promise is especially known for not keeping to the spec. I wouldn't trust the interrupt bit to be valid unless a dma is actually active, i.e. that
hwif->OUTB(hwif->INB(dma_base)|1, dma_base);
has actually been written.
I've actually had a manufacturer tell me that they don't worry about the spec, just making things work with Windows.
Ross
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