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-rw-r--r--drivers/iommu/amd/init.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/iommu/amd/init.c b/drivers/iommu/amd/init.c
index 64bcf3df37..7f65f3ecb2 100644
--- a/drivers/iommu/amd/init.c
+++ b/drivers/iommu/amd/init.c
@@ -2068,6 +2068,9 @@ static int __init iommu_init_pci(struct amd_iommu *iommu)
/* Prevent binding other PCI device drivers to IOMMU devices */
iommu->dev->match_driver = false;
+ /* ACPI _PRT won't have an IRQ for IOMMU */
+ iommu->dev->irq_managed = 1;
+
pci_read_config_dword(iommu->dev, cap_ptr + MMIO_CAP_HDR_OFFSET,
&iommu->cap);