Commit 37683e45 authored Nov 28, 2012 by Hiroshi Doyu Committed by Joerg Roedel Nov 28, 2012

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>

parent 9489e9dc

drivers/iommu/tegra-smmu.c

+1 −3

Original line number	Diff line number	Diff line
		@@ -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,