On Fri, Nov 11, 2022 at 02:54:17PM +0100, Thomas Gleixner wrote:
> PCI/Multi-MSI is MSI specific and not supported for MSI-X.
> 
> Signed-off-by: Thomas Gleixner <t...@linutronix.de>
> ---
>  drivers/iommu/intel/irq_remapping.c |    3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> --- a/drivers/iommu/intel/irq_remapping.c
> +++ b/drivers/iommu/intel/irq_remapping.c
> @@ -1334,8 +1334,7 @@ static int intel_irq_remapping_alloc(str
>  
>       if (!info || !iommu)
>               return -EINVAL;
> -     if (nr_irqs > 1 && info->type != X86_IRQ_ALLOC_TYPE_PCI_MSI &&
> -         info->type != X86_IRQ_ALLOC_TYPE_PCI_MSIX)
> +     if (nr_irqs > 1 && info->type != X86_IRQ_ALLOC_TYPE_PCI_MSI)
>               return -EINVAL;
>  
>       /*
> 

This check is only making sure that when multi-msi is requested that the
type has to be either MSI/MSIX. 

Wouldn't this change return -EINVAL when type = MSIX?

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