drm/nouveau/mmu/r535: uninitialized variable in r535_bar_new_()

If gf100_bar_new_() fails then "bar" is not initialized.

Fixes: 5bf0257 ("drm/nouveau/mmu/r535: initial support")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Signed-off-by: Danilo Krummrich <dakr@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/dab21df7-4d90-4479-97d8-97e5d228c714@moroto.mountain

drivers/gpu/drm/nouveau/nvkm/subdev/bar/r535.c

@@ -168,12 +168,11 @@ r535_bar_new_(const struct nvkm_bar_func *hw, struct nvkm_device *device,
 	rm->flush = r535_bar_flush;
 
 	ret = gf100_bar_new_(rm, device, type, inst, &bar);
-	*pbar = bar;
 	if (ret) {
-		if (!bar)
-			kfree(rm);
+		kfree(rm);
 		return ret;
 	}
+	*pbar = bar;
 
 	bar->flushBAR2PhysMode = ioremap(device->func->resource_addr(device, 3), PAGE_SIZE);
 	if (!bar->flushBAR2PhysMode)