diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h
index cdcf5eaf6714..bed84b316bba 100644
--- a/drivers/gpu/drm/radeon/radeon.h
+++ b/drivers/gpu/drm/radeon/radeon.h
@@ -1024,6 +1024,7 @@ struct radeon_device {
 	struct work_struct hotplug_work;
 	int num_crtc; /* number of crtcs */
 	struct mutex dc_hw_i2c_mutex; /* display controller hw i2c mutex */
+	struct mutex vram_mutex;
 
 	/* audio stuff */
 	struct timer_list	audio_timer;
diff --git a/drivers/gpu/drm/radeon/radeon_device.c b/drivers/gpu/drm/radeon/radeon_device.c
index 53a2c27dd8fa..0372ec96020f 100644
--- a/drivers/gpu/drm/radeon/radeon_device.c
+++ b/drivers/gpu/drm/radeon/radeon_device.c
@@ -599,6 +599,7 @@ int radeon_device_init(struct radeon_device *rdev,
 		spin_lock_init(&rdev->ih.lock);
 	mutex_init(&rdev->gem.mutex);
 	mutex_init(&rdev->pm.mutex);
+	mutex_init(&rdev->vram_mutex);
 	rwlock_init(&rdev->fence_drv.lock);
 	INIT_LIST_HEAD(&rdev->gem.objects);
 	init_waitqueue_head(&rdev->irq.vblank_queue);
diff --git a/drivers/gpu/drm/radeon/radeon_object.c b/drivers/gpu/drm/radeon/radeon_object.c
index 6a8617bac142..06def708b014 100644
--- a/drivers/gpu/drm/radeon/radeon_object.c
+++ b/drivers/gpu/drm/radeon/radeon_object.c
@@ -112,9 +112,11 @@ int radeon_bo_create(struct radeon_device *rdev, struct drm_gem_object *gobj,
 
 	radeon_ttm_placement_from_domain(bo, domain);
 	/* Kernel allocation are uninterruptible */
+	mutex_lock(&rdev->vram_mutex);
 	r = ttm_bo_init(&rdev->mman.bdev, &bo->tbo, size, type,
 			&bo->placement, 0, 0, !kernel, NULL, size,
 			&radeon_ttm_bo_destroy);
+	mutex_unlock(&rdev->vram_mutex);
 	if (unlikely(r != 0)) {
 		if (r != -ERESTARTSYS)
 			dev_err(rdev->dev,
@@ -170,7 +172,9 @@ void radeon_bo_unref(struct radeon_bo **bo)
 	if ((*bo) == NULL)
 		return;
 	tbo = &((*bo)->tbo);
+	mutex_lock(&(*bo)->rdev->vram_mutex);
 	ttm_bo_unref(&tbo);
+	mutex_unlock(&(*bo)->rdev->vram_mutex);
 	if (tbo == NULL)
 		*bo = NULL;
 }
diff --git a/drivers/gpu/drm/radeon/radeon_pm.c b/drivers/gpu/drm/radeon/radeon_pm.c
index a61de1f9ff64..da35bd7f38dc 100644
--- a/drivers/gpu/drm/radeon/radeon_pm.c
+++ b/drivers/gpu/drm/radeon/radeon_pm.c
@@ -32,6 +32,28 @@
 static void radeon_pm_idle_work_handler(struct work_struct *work);
 static int radeon_debugfs_pm_init(struct radeon_device *rdev);
 
+static void radeon_unmap_vram_bos(struct radeon_device *rdev)
+{
+	struct radeon_bo *bo, *n;
+
+	if (list_empty(&rdev->gem.objects))
+		return;
+
+	list_for_each_entry_safe(bo, n, &rdev->gem.objects, list) {
+		if (bo->tbo.mem.mem_type == TTM_PL_VRAM)
+			ttm_bo_unmap_virtual(&bo->tbo);
+	}
+
+	if (rdev->gart.table.vram.robj)
+		ttm_bo_unmap_virtual(&rdev->gart.table.vram.robj->tbo);
+
+	if (rdev->stollen_vga_memory)
+		ttm_bo_unmap_virtual(&rdev->stollen_vga_memory->tbo);
+
+	if (rdev->r600_blit.shader_obj)
+		ttm_bo_unmap_virtual(&rdev->r600_blit.shader_obj->tbo);
+}
+
 static void radeon_pm_set_clocks(struct radeon_device *rdev, int static_switch)
 {
 	int i;
@@ -48,6 +70,10 @@ static void radeon_pm_set_clocks(struct radeon_device *rdev, int static_switch)
 	rdev->irq.gui_idle = false;
 	radeon_irq_set(rdev);
 
+	mutex_lock(&rdev->vram_mutex);
+
+	radeon_unmap_vram_bos(rdev);
+
 	if (!static_switch) {
 		for (i = 0; i < rdev->num_crtc; i++) {
 			if (rdev->pm.active_crtcs & (1 << i)) {
@@ -67,6 +93,8 @@ static void radeon_pm_set_clocks(struct radeon_device *rdev, int static_switch)
 			}
 		}
 	}
+
+	mutex_unlock(&rdev->vram_mutex);
 	
 	/* update display watermarks based on new power state */
 	radeon_update_bandwidth_info(rdev);
diff --git a/drivers/gpu/drm/radeon/radeon_ttm.c b/drivers/gpu/drm/radeon/radeon_ttm.c
index af98f45954b3..3aa3a65800ab 100644
--- a/drivers/gpu/drm/radeon/radeon_ttm.c
+++ b/drivers/gpu/drm/radeon/radeon_ttm.c
@@ -607,13 +607,17 @@ static const struct vm_operations_struct *ttm_vm_ops = NULL;
 static int radeon_ttm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
 {
 	struct ttm_buffer_object *bo;
+	struct radeon_device *rdev;
 	int r;
 
-	bo = (struct ttm_buffer_object *)vma->vm_private_data;
+	bo = (struct ttm_buffer_object *)vma->vm_private_data;	
 	if (bo == NULL) {
 		return VM_FAULT_NOPAGE;
 	}
+	rdev = radeon_get_rdev(bo->bdev);
+	mutex_lock(&rdev->vram_mutex);
 	r = ttm_vm_ops->fault(vma, vmf);
+	mutex_unlock(&rdev->vram_mutex);
 	return r;
 }