drm/panfrost: Consider dma-buf imported objects as resident

A GEM object constructed from a dma-buf imported sgtable should be regarded
as being memory resident, because the dma-buf API mandates backing storage
to be allocated when attachment succeeds.
Signed-off-by: Adrián Larumbe <adrian.larumbe@collabora.com>
Fixes: 9ccdac7a ("drm/panfrost: Add fdinfo support for memory stats")
Reported-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Steven Price <steven.price@arm.com>
Signed-off-by: Steven Price <steven.price@arm.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231125205438.375407-2-adrian.larumbe@collabora.com

drivers/gpu/drm/panfrost/panfrost_gem.c

@@ -200,7 +200,7 @@ static enum drm_gem_object_status panfrost_gem_status(struct drm_gem_object *obj
 	struct panfrost_gem_object *bo = to_panfrost_bo(obj);
 	enum drm_gem_object_status res = 0;
 
-	if (bo->base.pages)
+	if (bo->base.base.import_attach || bo->base.pages)
 		res |= DRM_GEM_OBJECT_RESIDENT;
 
 	if (bo->base.madv == PANFROST_MADV_DONTNEED)