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iommu/arm-smmu-v3: Add a check to avoid invalid iotlb sync

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It may send a invalid tlb sync for smmuv3 if iotlb_gather is not valid
(iotlb_gather->pgsize = 0). So add a check to avoid invalid iotlb sync
for it.

Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com>
Link: https://lore.kernel.org/r/1617109106-121844-1-git-send-email-chenxiang66@hisilicon.com
Signed-off-by: Will Deacon <will@kernel.org>
This commit is contained in:
Xiang Chen 2021-03-30 20:58:26 +08:00 • committed by Will Deacon
parent 655c447c97
commit 6cc7e5a9c6
1 changed files with 3 additions and 0 deletions

3
drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
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@ -2305,6 +2305,9 @@ static void arm_smmu_iotlb_sync(struct iommu_domain *domain,
{
struct arm_smmu_domain *smmu_domain = to_smmu_domain(domain);
if (!gather->pgsize)
return;
arm_smmu_tlb_inv_range_domain(gather->start,
gather->end - gather->start + 1,
gather->pgsize, true, smmu_domain);