diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c
index b4c8655c70f4..f90e53bd918b 100644
--- a/drivers/iommu/arm-smmu.c
+++ b/drivers/iommu/arm-smmu.c
@@ -1143,6 +1143,10 @@ static int arm_smmu_domain_add_master(struct arm_smmu_domain *smmu_domain,
 		if (type == s2cr[idx].type && cbndx == s2cr[idx].cbndx)
 			continue;
 
+		/* Don't bypasss pinned streams; leave them as they are */
+		if (type == S2CR_TYPE_BYPASS && s2cr[idx].pinned)
+			continue;
+
 		s2cr[idx].type = type;
 		s2cr[idx].privcfg = S2CR_PRIVCFG_DEFAULT;
 		s2cr[idx].cbndx = cbndx;