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(parent: f75d8e3) | patch
iommu/arm-smmu-v3: Don't issue CMD_SYNC for zero-length invalidations
authorWill Deacon <will@kernel.org>
Wed, 21 Aug 2019 11:38:15 +0000 (12:38 +0100)
committerWill Deacon <will@kernel.org>
Wed, 21 Aug 2019 16:58:41 +0000 (17:58 +0100)
commit7314ca8699e1defd6f2883f203c0e828a4f51f9f
tree5d4d8295400c34caec78e010ff4909431991049atree | snapshot
parentf75d8e33df91ee66fc12820d0da1454b76ebcff9commit | diff
iommu/arm-smmu-v3: Don't issue CMD_SYNC for zero-length invalidations

Calling arm_smmu_tlb_inv_range() with a size of zero, perhaps due to
an empty 'iommu_iotlb_gather' structure, should be a NOP. Elide the
CMD_SYNC when there is no invalidation to be performed.

Signed-off-by: Will Deacon <will@kernel.org>
drivers/iommu/arm-smmu-v3.c diff | blob | history
ep93xx device tree rework repo: git://git.maquefel.me/linux.git