From: Clemens Ladisch on 1 Apr 2010 14:00
Linus Torvalds wrote:
> On Thu, 1 Apr 2010, Alex Deucher wrote:
> > Clemems' "PCI quirk: RS780/RS880: disable MSI completely" patch is the
> > right approach I think. Note that it's only devices hung off the int
> > gfx pci to pci bridge that have broken MSI (gfx and audio). MSI works
> > fine on the PCIE slots. I have a similar patch for rs400 chips on bug
> > 15626:
> > https://bugzilla.kernel.org/show_bug.cgi?id=15626
> Hmm. Does 'pci_msi_enable' only cover regular PCI devices? Or will that
> pci_no_msi() quirk disable MSI for PCIE too?
A quirk that used pci_no_msi() would disable all MSI for all devices.
However, these patches (and that in bug 15626) use PCI_BUS_FLAGS_NO_MSI
so that only the internal GPU devices are affected.
That "completely" in my patch title should better read "unconditionally".
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