D35458.1793535164.diff
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	diff --git a/sys/dev/iommu/iommu_gas.c b/sys/dev/iommu/iommu_gas.c
	--- a/sys/dev/iommu/iommu_gas.c
	+++ b/sys/dev/iommu/iommu_gas.c
	@@ -387,18 +387,18 @@
	return (ENOMEM);
	if (entry->first >= a->common->lowaddr)
	return (ENOMEM);
	- child = RB_RIGHT(entry, rb_entry);
	+ child = RB_LEFT(entry, rb_entry);
	if (child != NULL && 0 == iommu_gas_lowermatch(a, child))
	return (0);
	- if (child != NULL && entry->end < a->common->lowaddr &&
	- iommu_gas_match_one(a, entry->end, child->first,
	+ if (child != NULL && child->last < a->common->lowaddr &&
	+ iommu_gas_match_one(a, child->last, entry->start,
	a->common->lowaddr)) {
	iommu_gas_match_insert(a);
	return (0);
	}
	- child = RB_LEFT(entry, rb_entry);
	- if (child != NULL && child->last < a->common->lowaddr &&
	- iommu_gas_match_one(a, child->last, entry->start,
	+ child = RB_RIGHT(entry, rb_entry);
	+ if (child != NULL && entry->end < a->common->lowaddr &&
	+ iommu_gas_match_one(a, entry->end, child->first,
	a->common->lowaddr)) {
	iommu_gas_match_insert(a);
	return (0);