diff options
| author | Hiroshi Doyu <hdoyu@nvidia.com> | 2012-11-27 09:47:35 +0200 |
|---|---|---|
| committer | Mrutyunjay Sawant <msawant@nvidia.com> | 2012-12-04 22:12:47 -0800 |
| commit | 19263dcaa5f45aaa917c105bde542f950bd11ce2 (patch) | |
| tree | ca01809e3b56daf36c21d04d8f301a49663ed673 /drivers/iommu | |
| parent | 664d80b50153e0e34bbd9010f5602b2e2e40f1f8 (diff) | |
iommu/tegra: smmu: Remove unnecessary PTC/TLB flush all
smmu_flush_regs() does TLB/PTC flush all for 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().
Change-Id: I45d6decefcd49ef6f02043ead1a46701ee6ed19e
Signed-off-by: Hiroshi Doyu <hdoyu@nvidia.com>
Reviewed-on: http://git-master/r/166477
Reviewed-by: Mrutyunjay Sawant <msawant@nvidia.com>
Tested-by: Mrutyunjay Sawant <msawant@nvidia.com>
Diffstat (limited to 'drivers/iommu')
| -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 af2b973e1bfd..2eb6cd05b5cc 100644 --- a/drivers/iommu/tegra-smmu.c +++ b/drivers/iommu/tegra-smmu.c @@ -714,10 +714,8 @@ static int __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); - } return 0; } |