v1 --> v2:
1. change the type of nr_ats_masters from atomic_t to int, and move its
   ind/dec operation from arm_smmu_enable_ats()/arm_smmu_disable_ats() to
   arm_smmu_attach_dev()/arm_smmu_detach_dev(), and protected by
   "spin_lock_irqsave(&smmu_domain->devices_lock, flags);"

Zhen Lei (2):
  iommu/arm-smmu-v3: don't add a master into smmu_domain before it's
  iommu/arm-smmu-v3: add nr_ats_masters for quickly check

 drivers/iommu/arm-smmu-v3.c | 22 +++++++++++++++++-----
 1 file changed, 17 insertions(+), 5 deletions(-)


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