Bug#452841: zaptel-source: occasionally fails to initialize with error -5 and never accepts calls

[Folkert van Heusden]

> > Package: zaptel-source
> > Version: 1:1.4.5.1~dfsg-2
> > Severity: normal
> > 
> > occasionally fails to initialize with error -5 and never accepts calls
> > from dmesg:
> > Zapata Telephony Interface Registered on major 196
> > Zaptel Version: 1.4.5.1
> > Zaptel Echo Canceller: MG2
> > ACPI: PCI Interrupt 0000:06:02.0[A] -> GSI 18 (level, low) -> IRQ 18
> > FXO PCI Master abort
> > wcfxo: probe of 0000:06:02.0 failed with error -5
> 
> (error -5: -EIO - I/O error)
> I have noticed that those cards sometimes needed some PCI-level tweaks.
> e.g: on older kernels with some systems you sometimes needed to use the
> kernel parameter 'pci=noacpi' .

Ah yes. Some major googling tells me that the driver cannot handle IRQ
sharing. Unfortunately pci=noacpi doesn't fix this, things are still
sharing with some other device (an on-board device, usb etc). Also
swapping cards won't help as, well, the slots seem to share with
on-board devices. The bios on the motherboard (an Intel DG965WH) won't
let me set irqs per slot.
So my guess is that the driver should be altered to also support irq
sharing.


Folkert van Heusden

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