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-rw-r--r--drivers/iommu/amd_iommu.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index 9e8ea1907796..b531307a9360 100644
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -2472,6 +2472,9 @@ static struct protection_domain *get_domain(struct device *dev)
domain = to_pdomain(io_domain);
attach_device(dev, domain);
}
+ if (domain == NULL)
+ return ERR_PTR(-EBUSY);
+
if (!dma_ops_domain(domain))
return ERR_PTR(-EBUSY);