static int __init amdtee_driver_init()

in amdtee/core.c [452:515]

• 50 lines of code
• 7 McCabe index (conditional complexity)

static int __init amdtee_driver_init(void)
{
	struct tee_device *teedev;
	struct tee_shm_pool *pool;
	struct amdtee *amdtee;
	int rc;

	rc = psp_check_tee_status();
	if (rc) {
		pr_err("amd-tee driver: tee not present\n");
		return rc;
	}

	drv_data = kzalloc(sizeof(*drv_data), GFP_KERNEL);
	if (!drv_data)
		return -ENOMEM;

	amdtee = kzalloc(sizeof(*amdtee), GFP_KERNEL);
	if (!amdtee) {
		rc = -ENOMEM;
		goto err_kfree_drv_data;
	}

	pool = amdtee_config_shm();
	if (IS_ERR(pool)) {
		pr_err("shared pool configuration error\n");
		rc = PTR_ERR(pool);
		goto err_kfree_amdtee;
	}

	teedev = tee_device_alloc(&amdtee_desc, NULL, pool, amdtee);
	if (IS_ERR(teedev)) {
		rc = PTR_ERR(teedev);
		goto err_free_pool;
	}
	amdtee->teedev = teedev;

	rc = tee_device_register(amdtee->teedev);
	if (rc)
		goto err_device_unregister;

	amdtee->pool = pool;

	drv_data->amdtee = amdtee;

	pr_info("amd-tee driver initialization successful\n");
	return 0;

err_device_unregister:
	tee_device_unregister(amdtee->teedev);

err_free_pool:
	tee_shm_pool_free(pool);

err_kfree_amdtee:
	kfree(amdtee);

err_kfree_drv_data:
	kfree(drv_data);
	drv_data = NULL;

	pr_err("amd-tee driver initialization failed\n");
	return rc;
}