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Message-Id: <1359582228-21552-3-git-send-email-joro@8bytes.org> Date: Wed, 30 Jan 2013 22:43:46 +0100 From: Joerg Roedel <joro@...tes.org> To: Sethi Varun-B16395 <B16395@...escale.com> Cc: iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org, Joerg Roedel <joro@...tes.org> Subject: [PATCH 2/4] 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@...tes.org> --- drivers/iommu/iommu.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index ddbdaca..622360f 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -734,7 +734,8 @@ int iommu_map(struct iommu_domain *domain, unsigned long iova, size_t orig_size = size; int ret = 0; - if (unlikely(domain->ops->map == NULL)) + if (unlikely(domain->ops->unmap == NULL || + domain->ops->pgsize_bitmap == 0UL)) return -ENODEV; /* find out the minimum page size supported */ @@ -808,7 +809,8 @@ size_t iommu_unmap(struct iommu_domain *domain, unsigned long iova, size_t size) size_t unmapped_page, unmapped = 0; unsigned int min_pagesz; - if (unlikely(domain->ops->unmap == NULL)) + if (unlikely(domain->ops->unmap == NULL || + domain->ops->pgsize_bitmap == 0UL)) return -ENODEV; /* find out the minimum page size supported */ -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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