1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index 64d8942d6d14..e2d2cb3119b3 100644
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -3877,7 +3877,7 @@ static void vm_domain_remove_all_dev_info(struct dmar_domain *domain)
 }
 
 /* domain id for virtual machine, it won't be set in context */
-static unsigned long vm_domid;
+static atomic_t vm_domid = ATOMIC_INIT(0);
 
 static struct dmar_domain *iommu_alloc_vm_domain(void)
 {
@@ -3887,7 +3887,7 @@ static struct dmar_domain *iommu_alloc_vm_domain(void)
         if (!domain)
                 return NULL;
 
-        domain->id = vm_domid++;
+        domain->id = atomic_inc_return(&vm_domid);
         domain->nid = -1;
         memset(domain->iommu_bmp, 0, sizeof(domain->iommu_bmp));
         domain->flags = DOMAIN_FLAG_VIRTUAL_MACHINE;