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SubjectRe: [PATCH] Disable INTx when enabling MSI in forcedeth
On Tue, 21 Nov 2006, Linus Torvalds wrote:

> On Tue, 21 Nov 2006, Daniel Barkalow wrote:
> >
> > My nVidia ethernet card doesn't disable its own INTx when MSI is
> > enabled. This causes a steady stream of spurious interrupts that
> > eventually kills my SATA IRQ if MSI is used with forcedeth, which is
> > true by default. Simply disabling the INTx interrupt takes care of it.
> >
> > This is against -stable, and would be suitable once someone who knows the
> > code verifies that it's correct.
>
> I _really_ think that we should do this in pci_msi_enable().
>
> Screw cards that are not PCI-2.3 compliant - just make the rule be that if
> you use MSI, you _have_ to allow us to set the disable-INTx bit. It's then
> up to the drivers to decide if they can use MSI or not.
>
> (Even a number of cards that are not PCI-2.3 may simply not _implement_
> the disable-INTx bit, and in that case, they can use MSI if they disable
> INTx automatically - the ).
>
> Comments?

I think that's the right thing to do, but I bet it'll break systems until
the drivers are up to date. So I'd wait until 2.6.20 to do it that way,
but definitely do it that way then.

-Daniel
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