drm/amdgpu: use the preferred pin domain after the check

For some reason we run into an use case where a BO is already pinned
into GTT, but should be pinned into VRAM|GTT again.

Handle that case gracefully as well.
Reviewed-by: NShashank Sharma <Shashank.sharma@amd.com>
Reviewed-by: NAlex Deucher <alexander.deucher@amd.com>
Signed-off-by: NChristian König <christian.koenig@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org

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

@@ -920,11 +920,6 @@ int amdgpu_bo_pin_restricted(struct amdgpu_bo *bo, u32 domain,
 			return -EINVAL;
 	}
 
-	/* This assumes only APU display buffers are pinned with (VRAM|GTT).
-	 * See function amdgpu_display_supported_domains()
-	 */
-	domain = amdgpu_bo_get_preferred_pin_domain(adev, domain);
-
 	if (bo->tbo.pin_count) {
 		uint32_t mem_type = bo->tbo.resource->mem_type;
 		uint32_t mem_flags = bo->tbo.resource->placement;
@@ -949,6 +944,11 @@ int amdgpu_bo_pin_restricted(struct amdgpu_bo *bo, u32 domain,
 		return 0;
 	}
 
+	/* This assumes only APU display buffers are pinned with (VRAM|GTT).
+	 * See function amdgpu_display_supported_domains()
+	 */
+	domain = amdgpu_bo_get_preferred_pin_domain(adev, domain);
+
 	if (bo->tbo.base.import_attach)
 		dma_buf_pin(bo->tbo.base.import_attach);