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| author | Hiroshi Doyu <hdoyu@nvidia.com> | 2012-11-28 15:52:53 +0200 |
|---|---|---|
| committer | Joerg Roedel <joro@8bytes.org> | 2012-11-28 16:11:52 +0100 |
| commit | 37683e45623a0ccd34761c71aad618cc129fe35c (patch) | |
| tree | b02d6d8853a94c0c2af7623c83c36614b20b7b31 | |
| parent | 9489e9dcae718d5fde988e4a684a0f55b5f94d17 (diff) | |
| download | linux-37683e45623a0ccd34761c71aad618cc129fe35c.tar.gz linux-37683e45623a0ccd34761c71aad618cc129fe35c.tar.bz2 linux-37683e45623a0ccd34761c71aad618cc129fe35c.zip | |
iommu/tegra: smmu: Remove unnecessary PTC/TLB flush all
smmu_flush_regs() does TLB/PTC flush all when freeing a second level
page table. This isn't necessay at all since each pte entry has been
already maintained by address in the above flush_ptc_and_tlb().
Signed-off-by: Hiroshi Doyu <hdoyu@nvidia.com>
Signed-off-by: Joerg Roedel <joro@8bytes.org>
| -rw-r--r-- | drivers/iommu/tegra-smmu.c | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/drivers/iommu/tegra-smmu.c b/drivers/iommu/tegra-smmu.c index c0f7a4266263..48538a6d2198 100644 --- a/drivers/iommu/tegra-smmu.c +++ b/drivers/iommu/tegra-smmu.c @@ -696,10 +696,8 @@ static void __smmu_iommu_unmap(struct smmu_as *as, dma_addr_t iova) *pte = _PTE_VACANT(iova); FLUSH_CPU_DCACHE(pte, page, sizeof(*pte)); flush_ptc_and_tlb(as->smmu, as, iova, pte, page, 0); - if (!--(*count)) { + if (!--(*count)) free_ptbl(as, iova); - smmu_flush_regs(as->smmu, 0); - } } static void __smmu_iommu_map_pfn(struct smmu_as *as, dma_addr_t iova, |