iommu/amd: Enforce alignment for MSI IRQs

Make use of the new alignment capability of
alloc_irq_index() to enforce IRQ index alignment
for MSI.

Reported-by: Thomas Gleixner <[email protected]>
Fixes: 2b324506341cb ('iommu/amd: Add routines to manage irq remapping tables')
Reviewed-by: Thomas Gleixner <[email protected]>
Signed-off-by: Joerg Roedel <[email protected]>

diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index 2d4ee2555a0de4465caa20e6357bc2dc598084d2..cb7c531542dab5f2fda134fce6c8f8c8a7e4022a 100644 (file)
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -4102,7 +4102,9 @@ static int irq_remapping_alloc(struct irq_domain *domain, unsigned int virq,
                else
                        ret = -ENOMEM;
        } else {
-               index = alloc_irq_index(devid, nr_irqs, false);
+               bool align = (info->type == X86_IRQ_ALLOC_TYPE_MSI);
+
+               index = alloc_irq_index(devid, nr_irqs, align);
        }
        if (index < 0) {
                pr_warn("Failed to allocate IRTE\n");