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iommu/iova: Don't try to copy anchor nodes 

Anchor nodes are not reserved IOVAs in the way that copy_reserved_iova()
cares about - while the failure from reserve_iova() is benign since the
target domain will already have its own anchor, we still don't want to
be triggering spurious warnings.

Reported-by: kernel test robot <fengguang.wu@intel.com>
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Fixes: bb68b2fbfb ('iommu/iova: Add rbtree anchor node')
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Robin Murphy 2017-10-02 11:53:31 +01:00 committed by Joerg Roedel
parent e8b1984027
commit abbb8a0938
1 changed files with 3 additions and 0 deletions
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3
drivers/iommu/iova.c
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@ -704,6 +704,9 @@ copy_reserved_iova(struct iova_domain *from, struct iova_domain *to)
struct iova *iova = rb_entry(node, struct iova, node);
struct iova *new_iova;
if (iova->pfn_lo == IOVA_ANCHOR)
continue;
new_iova = reserve_iova(to, iova->pfn_lo, iova->pfn_hi);
if (!new_iova)
printk(KERN_ERR "Reserve iova range %lx@%lx failed\n",