iommu: Check for valid pgsize_bitmap in iommu_map/unmap
In case the page-size bitmap is zero the code path in iommu_map and iommu_unmap is undefined. Make it defined and return -ENODEV in this case. Signed-off-by: Joerg Roedel <joro@8bytes.org>
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@ -734,7 +734,8 @@ int iommu_map(struct iommu_domain *domain, unsigned long iova,
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size_t orig_size = size;
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int ret = 0;
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if (unlikely(domain->ops->map == NULL))
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if (unlikely(domain->ops->unmap == NULL ||
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domain->ops->pgsize_bitmap == 0UL))
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return -ENODEV;
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/* find out the minimum page size supported */
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@ -808,7 +809,8 @@ size_t iommu_unmap(struct iommu_domain *domain, unsigned long iova, size_t size)
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size_t unmapped_page, unmapped = 0;
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unsigned int min_pagesz;
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if (unlikely(domain->ops->unmap == NULL))
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if (unlikely(domain->ops->unmap == NULL ||
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domain->ops->pgsize_bitmap == 0UL))
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return -ENODEV;
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/* find out the minimum page size supported */
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