On Thu, May 24, 2007 at 02:53:08PM -0600, Eric W. Biederman wrote:
>
>
> Could you please try the patch below. Unless I have misread something
> this should fix your problem....
>
> diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
> index 000c9ae..2e1d4af 100644
> --- a/drivers/pci/msi.c
> +++ b/drivers/pci/msi.c
> @@ -404,7 +404,7 @@ static int msix_capability_init(struct pci_dev *dev,
> entry->dev = dev;
> entry->mask_base = base;
>
> - list_add(&entry->list, &dev->msi_list);
> + list_add_tail(&entry->list, &dev->msi_list);
> }
Yes, this is what we found. But we made 2 changes to list_add. Just sent the
patch.
>
> ret = arch_setup_msi_irqs(dev, nvec, PCI_CAP_ID_MSIX);
>
> > Michael or Eric, would you please review this patch and see if it's OK?
> > Adding
> > an else
> > between the the if (list_is....) and the writel resolved the Oops. I'm not
> > sure
> > how this
> > is supposed to work but using entry->mask_base after iounmap'ing seems
> > wrong.
>
> I think I would rather just swap those two lines of code.
> We are manually setting the mask bit to make certain the irq doesn't
> fire after we free it, and we clearly want to set the mask bit for
> all the irq entries.
OK, new patch on the way.
mikem
>
> > diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
> > index d9cbd58..0e67723 100644
> > --- a/drivers/pci/msi.c
> > +++ b/drivers/pci/msi.c
> > @@ -560,10 +560,11 @@ static int msi_free_irqs(struct pci_dev* dev)
> > if (entry->msi_attrib.type == PCI_CAP_ID_MSIX) {
> > if (list_is_last(&entry->list, &dev->msi_list))
> > iounmap(entry->mask_base);
> > -
> > - writel(1, entry->mask_base + entry->msi_attrib.entry_nr
> > - * PCI_MSIX_ENTRY_SIZE
> > - + PCI_MSIX_ENTRY_VECTOR_CTRL_OFFSET);
> > + else
> > + writel(1, entry->mask_base
> > + + entry->msi_attrib.entry_nr
> > + * PCI_MSIX_ENTRY_SIZE
> > + + PCI_MSIX_ENTRY_VECTOR_CTRL_OFFSET);
> > }
> > list_del(&entry->list);
> > kfree(entry);
> > -----------------------------------------------------------------------------------------
> >
> > I hope this clears up a little of the fog.
>
> Yes it does thanks.
>
> Eric
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