The return value of arm_smmu_iova_to_phys is directly passed to the
user of the IOMMU API via iommu_iova_to_phys; however the ARM SMMU
driver returns -EINVAL on error, which is not consistent with the
rest of the drivers implementing the IOMMU API. VFIO also relies on
the call returning NULL when a page has not been mapped already.
Signed-off-by: Antonios Motakis <a.mota...@virtualopensystems.com>
---
drivers/iommu/arm-smmu.c | 5 +----
1 file changed, 1 insertion(+), 4 deletions(-)
diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c
index 8b71332..fe81b20 100644
--- a/drivers/iommu/arm-smmu.c
+++ b/drivers/iommu/arm-smmu.c
@@ -1480,10 +1480,7 @@ static phys_addr_t arm_smmu_iova_to_phys(struct
iommu_domain *domain,
err_unlock:
spin_unlock(&smmu_domain->lock);
- dev_warn(smmu->dev,
- "invalid (corrupt?) page tables detected for iova 0x%llx\n",
- (unsigned long long)iova);
- return -EINVAL;
+ return NULL;
}
static int arm_smmu_domain_has_cap(struct iommu_domain *domain,
--
1.8.1.2
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