Commit 6cc7e5a9 authored by Xiang Chen's avatar Xiang Chen Committed by Will Deacon
Browse files

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



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: default avatarXiang Chen <chenxiang66@hisilicon.com>
Link: https://lore.kernel.org/r/1617109106-121844-1-git-send-email-chenxiang66@hisilicon.com


Signed-off-by: default avatarWill Deacon <will@kernel.org>
parent 655c447c

drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c

+3 −0
Original line number Diff line number Diff line
@@ -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);