Paul,
do I understand correctly that the *only* difference between the working
setup is that you applied (by hand) the libata patch that Jeff sent out?
So plain 2.6.21-rc2 works fine, but with the patch applied, you get no
interrupts on the DVD drive?
On Sun, 11 Mar 2007, Paul Rolland wrote:
>
> > It seems like IRQ is not getting through. The first IRQ
> > driven command is failing for you.
>
> Hmmmm....
> > Extract is :
> > ata7: PATA max UDMA/100 cmd 0x0000000000019c00 ctl 0x0000000000019882 bmdma
> > 0x0000000000019400 irq 16
> > ata8: PATA max UDMA/100 cmd 0x0000000000019800 ctl 0x0000000000019482 bmdma
> > 0x0000000000019408 irq 16
>
> IRQ 16 is IO-APIC-fasteoi for libata, and is not shared... but all the
> others libata IRQ are IO-APIC-edge.
Ok, that's interesting, although IO-APIC-fasteoi certainly works for
others (eg me), but it's still useful.
> > * Does giving 'acpi=off' or 'irqpoll' make any difference?
> >
> > * Can you connect a harddisk to the channel and see whether
> > that works?
>
> Tried that.. Disk is identified as ATA-7: Mastor 6Y080L0, YAR41BW0, max
> UDMA/13 and then timeout again...
>
> Tried then with acpi=off, same result (identify is OK, but then timeout),
> and irqpoll and then it was OK !!!!
Whee... There were no changes that looked interrupt-related there..
Linus
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