[PATCH v2 08/23] iommu/io-pgtable-arm-v7s: Use ias to check the valid iova in unmap
From: Yong Wu <yong.wu@mediatek.com>
Date: 2020-09-05 08:12:44
Also in:
linux-devicetree, linux-iommu, linux-mediatek, lkml
Subsystem:
arm smmu drivers, iommu subsystem, the rest · Maintainers:
Will Deacon, Joerg Roedel, Linus Torvalds
As title. BTW, change the ias/oas checking format in v7s_map. Signed-off-by: Yong Wu <yong.wu@mediatek.com> --- drivers/iommu/io-pgtable-arm-v7s.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/drivers/iommu/io-pgtable-arm-v7s.c b/drivers/iommu/io-pgtable-arm-v7s.c
index a688f22cbe3b..4c9d8dccfc5a 100644
--- a/drivers/iommu/io-pgtable-arm-v7s.c
+++ b/drivers/iommu/io-pgtable-arm-v7s.c@@ -526,8 +526,7 @@ static int arm_v7s_map(struct io_pgtable_ops *ops, unsigned long iova, if (!(prot & (IOMMU_READ | IOMMU_WRITE))) return 0; - if (WARN_ON(iova >= (1ULL << data->iop.cfg.ias) || - paddr >= (1ULL << data->iop.cfg.oas))) + if (WARN_ON(iova >> data->iop.cfg.ias || paddr >> data->iop.cfg.oas)) return -ERANGE; ret = __arm_v7s_map(data, iova, paddr, size, prot, 1, data->pgd, gfp);
@@ -717,7 +716,7 @@ static size_t arm_v7s_unmap(struct io_pgtable_ops *ops, unsigned long iova, { struct arm_v7s_io_pgtable *data = io_pgtable_ops_to_data(ops); - if (WARN_ON(upper_32_bits(iova))) + if (WARN_ON(iova >> data->iop.cfg.ias)) return 0; return __arm_v7s_unmap(data, gather, iova, size, 1, data->pgd);
--
2.18.0
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