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authorRobin Murphy <robin.murphy@arm.com>2017-10-02 13:53:31 +0300
committerJoerg Roedel <jroedel@suse.de>2017-10-02 16:45:24 +0300
commitabbb8a09384f69f7bb05936879e51933c146afba (patch)
tree87c6386f5fc66a308c55ccf8791ad4a2e5735106 /drivers/iommu/iova.c
parente8b198402745ed413ed8229b2eb45d34016eb5d8 (diff)
downloadlinux-abbb8a09384f69f7bb05936879e51933c146afba.tar.xz
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: bb68b2fbfbd6 ('iommu/iova: Add rbtree anchor node') Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu/iova.c')
-rw-r--r--drivers/iommu/iova.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/iommu/iova.c b/drivers/iommu/iova.c
index b0ca23682008..3aee64b99df1 100644
--- a/drivers/iommu/iova.c
+++ b/drivers/iommu/iova.c
@@ -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",