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BACKPORT: FROMLIST: iommu/io-pgtable-arm-v7s: Use ias to check the valid iova in unmap

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Use the ias for the valid iova checking in _unmap.
It is a preparing patch for supporting iova 34bit for MediaTek.
BTW, change the ias/oas checking format in v7s_map.

Bug: 167939345
Link: https://lore.kernel.org/patchwork/patch/1301119/
Change-Id: I78a5399fb5f6555ba9aca916393ed62262853e34
Signed-off-by: Yong Wu <yong.wu@mediatek.com>
Signed-off-by: Chao Hao <chao.hao@mediatek.com>
Signed-off-by: Chun-Hung Wu <chun-hung.wu@mediatek.com>
This commit is contained in:
Chao Hao 2020-09-08 17:03:17 +08:00 • committed by Todd Kjos
commit ba7883760a
1 changed files with 1 additions and 1 deletions
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2
drivers/iommu/io-pgtable-arm-v7s.c
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@ -719,7 +719,7 @@ 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 >= (1ULL << data->iop.cfg.ias)))
return 0;
return __arm_v7s_unmap(data, gather, iova, size, 1, data->pgd);