[PATCH] ACPI/IORT: Fix build without CONFIG_IOMMU_API

[Christoph Hellwig <hch@xxxxxx>]

IOMMU_FWSPEC_PCI_RC_ATS is only defined if CONFIG_IOMMU_API is
enabled.

Fixes: 5702ee24182f ("ACPI/IORT: Check ATS capability in root complex nodes")
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
---
 drivers/acpi/arm64/iort.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/acpi/arm64/iort.c b/drivers/acpi/arm64/iort.c
index 9058cb084b91..3e542b5d2a2d 100644
--- a/drivers/acpi/arm64/iort.c
+++ b/drivers/acpi/arm64/iort.c
@@ -1074,9 +1074,10 @@ const struct iommu_ops *iort_iommu_configure(struct device *dev)
 		info.node = node;
 		err = pci_for_each_dma_alias(to_pci_dev(dev),
 					     iort_pci_iommu_init, &info);
-
+#ifdef CONFIG_IOMMU_API
 		if (!err && iort_pci_rc_supports_ats(node))
 			dev->iommu_fwspec->flags |= IOMMU_FWSPEC_PCI_RC_ATS;
+#endif
 	} else {
 		int i = 0;
 
-- 
2.20.1