diff --git a/drivers/pci/intel-iommu.c b/drivers/pci/intel-iommu.c
index 3dfecb2..2a1e7a2 100644
--- a/drivers/pci/intel-iommu.c
+++ b/drivers/pci/intel-iommu.c
@@ -453,8 +453,7 @@ static struct intel_iommu *device_to_iommu(u8 bus, u8 devfn)
 static void domain_flush_cache(struct dmar_domain *domain,
 			       void *addr, int size)
 {
-	if (!domain->iommu_coherency)
-		clflush_cache_range(addr, size);
+	clflush_cache_range(addr, size);
 }
 
 /* Gets context entry for a given bus and devfn */