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iommu/arm-smmu: Return 0 on unmap failure 

The IOMMU core expects the unmap operation to return the number of bytes
that have been unmapped or 0 on failure, a negative return value being
treated like a number of bytes.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
This commit is contained in:
Laurent Pinchart 2014-02-28 15:37:10 +00:00 committed by Will Deacon
parent c9eaa447e7
commit 16c50dcfc4
1 changed files with 1 additions and 1 deletions
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2
drivers/iommu/arm-smmu.c
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@ -1499,7 +1499,7 @@ static size_t arm_smmu_unmap(struct iommu_domain *domain, unsigned long iova,
ret = arm_smmu_handle_mapping(smmu_domain, iova, 0, size, 0);
arm_smmu_tlb_inv_context(&smmu_domain->root_cfg);
return ret ? ret : size;
return ret ? 0 : size;
}
static phys_addr_t arm_smmu_iova_to_phys(struct iommu_domain *domain,