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diff --git a/sys/arm64/arm64/gicv3_its.c b/sys/arm64/arm64/gicv3_its.c
--- a/sys/arm64/arm64/gicv3_its.c
+++ b/sys/arm64/arm64/gicv3_its.c
@@ -1470,6 +1470,8 @@
sc = device_get_softc(dev);
ctx = iommu_get_dev_ctx(child);
+ if(ctx == NULL)
+ return ENXIO;
error = iommu_map_msi(ctx, PAGE_SIZE, GITS_TRANSLATER,
IOMMU_MAP_ENTRY_WRITE, IOMMU_MF_CANWAIT, &sc->ma);
*domain = iommu_get_ctx_domain(ctx);

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