drm/nouveau/core/memory: add reference counting

We need to be able to prevent memory from being freed while it's still
mapped in a GPU's address-space.

Will be used by upcoming MMU changes.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

1 files changed, 3 insertions, 3 deletions

diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/bar/gf100.c b/drivers/gpu/drm/nouveau/nvkm/subdev/bar/gf100.c
index b155a7f76ca7..9f7b4e7532b7 100644
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/bar/gf100.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/bar/gf100.c
@@ -166,14 +166,14 @@ gf100_bar_dtor(struct nvkm_bar *base)
 
 	nvkm_vm_ref(NULL, &bar->bar[1].vm, bar->bar[1].pgd);
 	nvkm_gpuobj_del(&bar->bar[1].pgd);
-	nvkm_memory_del(&bar->bar[1].mem);
+	nvkm_memory_unref(&bar->bar[1].mem);
 
 	if (bar->bar[0].vm) {
-		nvkm_memory_del(&bar->bar[0].vm->pgt[0].mem[0]);
+		nvkm_memory_unref(&bar->bar[0].vm->pgt[0].mem[0]);
 		nvkm_vm_ref(NULL, &bar->bar[0].vm, bar->bar[0].pgd);
 	}
 	nvkm_gpuobj_del(&bar->bar[0].pgd);
-	nvkm_memory_del(&bar->bar[0].mem);
+	nvkm_memory_unref(&bar->bar[0].mem);
 	return bar;
 }