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SubjectRe: [PATCH 17/19] x86, msi: Introduce x86_msi.compose_msi_msg call-back
On Mon, Aug 20, 2012 at 03:56:03PM +0200, Joerg Roedel wrote:
> This call-back points to the right function for initializing
> the msi_msg structure.

So you pull out the compose_remapped_msi_msg() out of msi_compose_msg() and
put this in a callback. Such information is good since you don't see this in
diff and even --patience does not help here.

> --- a/drivers/iommu/irq_remapping.c
> +++ b/drivers/iommu/irq_remapping.c
> @@ -242,10 +243,12 @@ void compose_remapped_msi_msg(struct pci_dev *pdev,
> unsigned int irq, unsigned int dest,
> struct msi_msg *msg, u8 hpet_id)
> {
> - if (!remap_ops || !remap_ops->compose_msi_msg)
> - return;
> + struct irq_cfg *cfg = irq_get_chip_data(irq);
>
> - remap_ops->compose_msi_msg(pdev, irq, dest, msg, hpet_id);
> + if (cfg && !irq_remapped(cfg))
> + native_compose_msi_msg(pdev, irq, dest, msg, hpet_id);
> + else if (remap_ops && remap_ops->compose_msi_msg)
> + remap_ops->compose_msi_msg(pdev, irq, dest, msg, hpet_id);

cfg _has_ to be valid here and if it is not than you shouldn't assume that
this irq is remapped.
Also remap_ops has to be set here. And ->compose_msi_msg() should be set
here as well. Would it make sense if it is not set?

> }
>
> static int msi_alloc_remapped_irq(struct pci_dev *pdev, int irq, int nvec)

Sebastian


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