drm/amdgpu: Fix unmapping of aperture

When aperture size is zero, there is no mapping done.
Signed-off-by: Lijo Lazar <lijo.lazar@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_device.c

@@ -4121,7 +4121,7 @@ static void amdgpu_device_unmap_mmio(struct amdgpu_device *adev)
 	adev->mman.aper_base_kaddr = NULL;
 
 	/* Memory manager related */
-	if (!adev->gmc.xgmi.connected_to_cpu) {
+	if (!adev->gmc.xgmi.connected_to_cpu && !adev->gmc.is_app_apu) {
 		arch_phys_wc_del(adev->gmc.vram_mtrr);
 		arch_io_free_memtype_wc(adev->gmc.aper_base, adev->gmc.aper_size);
 	}

drivers/gpu/drm/amd/amdgpu/amdgpu_object.c

@@ -1080,8 +1080,7 @@ void amdgpu_bo_fini(struct amdgpu_device *adev)
 	amdgpu_ttm_fini(adev);
 
 	if (drm_dev_enter(adev_to_drm(adev), &idx)) {
-
-		if (!adev->gmc.xgmi.connected_to_cpu) {
+		if (!adev->gmc.xgmi.connected_to_cpu && !adev->gmc.is_app_apu) {
 			arch_phys_wc_del(adev->gmc.vram_mtrr);
 			arch_io_free_memtype_wc(adev->gmc.aper_base, adev->gmc.aper_size);
 		}

drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c

@@ -1844,12 +1844,13 @@ int amdgpu_ttm_init(struct amdgpu_device *adev)
 		adev->mman.aper_base_kaddr = ioremap_cache(adev->gmc.aper_base,
 				adev->gmc.visible_vram_size);
 
-	else if (!adev->gmc.is_app_apu)
+	else if (adev->gmc.is_app_apu)
+		DRM_DEBUG_DRIVER(
+			"No need to ioremap when real vram size is 0\n");
+	else
 #endif
 		adev->mman.aper_base_kaddr = ioremap_wc(adev->gmc.aper_base,
 				adev->gmc.visible_vram_size);
-	else
-		DRM_DEBUG_DRIVER("No need to ioremap when real vram size is 0\n");
 #endif
 
 	/*