diff --git a/drivers/gpu/drm/nouveau/core/subdev/vm/nv50.c b/drivers/gpu/drm/nouveau/core/subdev/vm/nv50.c
index 50c66122cc89bdcd73fd1b56a1acb8a5dde20fd8..486c813b9ea97d3f234c23a985d0817f8feb3612 100644
--- a/drivers/gpu/drm/nouveau/core/subdev/vm/nv50.c
+++ b/drivers/gpu/drm/nouveau/core/subdev/vm/nv50.c
@@ -27,6 +27,7 @@
 
 #include <subdev/timer.h>
 #include <subdev/fb.h>
+#include <subdev/bar.h>
 #include <subdev/vm.h>
 
 struct nv50_vmmgr_priv {
@@ -151,9 +152,12 @@ static void
 nv50_vm_flush(struct nouveau_vm *vm)
 {
 	struct nv50_vmmgr_priv *priv = (void *)vm->vmm;
+	struct nouveau_bar *bar = nouveau_bar(priv);
 	struct nouveau_engine *engine;
 	int i, vme;
 
+	bar->flush(bar);
+
 	mutex_lock(&nv_subdev(priv)->mutex);
 	for (i = 0; i < NVDEV_SUBDEV_NR; i++) {
 		if (!atomic_read(&vm->engref[i]))
diff --git a/drivers/gpu/drm/nouveau/core/subdev/vm/nvc0.c b/drivers/gpu/drm/nouveau/core/subdev/vm/nvc0.c
index 6c3aea55d50315d3e565e81b5593e649f5e21f22..668cf964e4a90af5e65681961f53400c7be3f96e 100644
--- a/drivers/gpu/drm/nouveau/core/subdev/vm/nvc0.c
+++ b/drivers/gpu/drm/nouveau/core/subdev/vm/nvc0.c
@@ -29,6 +29,7 @@
 #include <subdev/fb.h>
 #include <subdev/vm.h>
 #include <subdev/ltcg.h>
+#include <subdev/bar.h>
 
 struct nvc0_vmmgr_priv {
 	struct nouveau_vmmgr base;
@@ -163,9 +164,12 @@ static void
 nvc0_vm_flush(struct nouveau_vm *vm)
 {
 	struct nvc0_vmmgr_priv *priv = (void *)vm->vmm;
+	struct nouveau_bar *bar = nouveau_bar(priv);
 	struct nouveau_vm_pgd *vpgd;
 	u32 type;
 
+	bar->flush(bar);
+
 	type = 0x00000001; /* PAGE_ALL */
 	if (atomic_read(&vm->engref[NVDEV_SUBDEV_BAR]))
 		type |= 0x00000004; /* HUB_ONLY */