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Diffstat (limited to 'drivers/iommu/intel-iommu.c')
-rw-r--r--drivers/iommu/intel-iommu.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index db820d7dd0b..d4a4cd445ca 100644
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -589,7 +589,9 @@ static void domain_update_iommu_coherency(struct dmar_domain *domain)
{
int i;
- domain->iommu_coherency = 1;
+ i = find_first_bit(domain->iommu_bmp, g_num_of_iommus);
+
+ domain->iommu_coherency = i < g_num_of_iommus ? 1 : 0;
for_each_set_bit(i, domain->iommu_bmp, g_num_of_iommus) {
if (!ecap_coherent(g_iommus[i]->ecap)) {